diff options
Diffstat (limited to 'third_party/git/builtin/am.c')
| -rw-r--r-- | third_party/git/builtin/am.c | 2437 |
1 files changed, 0 insertions, 2437 deletions
diff --git a/third_party/git/builtin/am.c b/third_party/git/builtin/am.c deleted file mode 100644 index 4949535a7f1f..000000000000 --- a/third_party/git/builtin/am.c +++ /dev/null @@ -1,2437 +0,0 @@ -/* - * Builtin "git am" - * - * Based on git-am.sh by Junio C Hamano. - */ -#define USE_THE_INDEX_COMPATIBILITY_MACROS -#include "cache.h" -#include "config.h" -#include "builtin.h" -#include "exec-cmd.h" -#include "parse-options.h" -#include "dir.h" -#include "run-command.h" -#include "quote.h" -#include "tempfile.h" -#include "lockfile.h" -#include "cache-tree.h" -#include "refs.h" -#include "commit.h" -#include "diff.h" -#include "diffcore.h" -#include "unpack-trees.h" -#include "branch.h" -#include "sequencer.h" -#include "revision.h" -#include "merge-recursive.h" -#include "log-tree.h" -#include "notes-utils.h" -#include "rerere.h" -#include "prompt.h" -#include "mailinfo.h" -#include "apply.h" -#include "string-list.h" -#include "packfile.h" -#include "repository.h" - -/** - * Returns the length of the first line of msg. - */ -static int linelen(const char *msg) -{ - return strchrnul(msg, '\n') - msg; -} - -/** - * Returns true if `str` consists of only whitespace, false otherwise. - */ -static int str_isspace(const char *str) -{ - for (; *str; str++) - if (!isspace(*str)) - return 0; - - return 1; -} - -enum patch_format { - PATCH_FORMAT_UNKNOWN = 0, - PATCH_FORMAT_MBOX, - PATCH_FORMAT_STGIT, - PATCH_FORMAT_STGIT_SERIES, - PATCH_FORMAT_HG, - PATCH_FORMAT_MBOXRD -}; - -enum keep_type { - KEEP_FALSE = 0, - KEEP_TRUE, /* pass -k flag to git-mailinfo */ - KEEP_NON_PATCH /* pass -b flag to git-mailinfo */ -}; - -enum scissors_type { - SCISSORS_UNSET = -1, - SCISSORS_FALSE = 0, /* pass --no-scissors to git-mailinfo */ - SCISSORS_TRUE /* pass --scissors to git-mailinfo */ -}; - -enum signoff_type { - SIGNOFF_FALSE = 0, - SIGNOFF_TRUE = 1, - SIGNOFF_EXPLICIT /* --signoff was set on the command-line */ -}; - -enum show_patch_type { - SHOW_PATCH_RAW = 0, - SHOW_PATCH_DIFF = 1, -}; - -struct am_state { - /* state directory path */ - char *dir; - - /* current and last patch numbers, 1-indexed */ - int cur; - int last; - - /* commit metadata and message */ - char *author_name; - char *author_email; - char *author_date; - char *committer_name; - char *committer_email; - char *msg; - size_t msg_len; - - /* when --rebasing, records the original commit the patch came from */ - struct object_id orig_commit; - - /* number of digits in patch filename */ - int prec; - - /* various operating modes and command line options */ - int interactive; - int threeway; - int quiet; - int signoff; /* enum signoff_type */ - int utf8; - int keep; /* enum keep_type */ - int message_id; - int scissors; /* enum scissors_type */ - struct strvec git_apply_opts; - const char *resolvemsg; - int committer_date_is_author_date; - int ignore_date; - int allow_rerere_autoupdate; - const char *sign_commit; - int rebasing; -}; - -/** - * Initializes am_state with the default values. - */ -static void am_state_init(struct am_state *state) -{ - const char *committer; - struct ident_split id; - int gpgsign; - - memset(state, 0, sizeof(*state)); - - state->dir = git_pathdup("rebase-apply"); - - state->prec = 4; - - git_config_get_bool("am.threeway", &state->threeway); - - state->utf8 = 1; - - git_config_get_bool("am.messageid", &state->message_id); - - state->scissors = SCISSORS_UNSET; - - strvec_init(&state->git_apply_opts); - - if (!git_config_get_bool("commit.gpgsign", &gpgsign)) - state->sign_commit = gpgsign ? "" : NULL; - - committer = git_committer_info(IDENT_STRICT); - if (split_ident_line(&id, committer, strlen(committer)) < 0) - die(_("invalid committer: %s"), committer); - state->committer_name = - xmemdupz(id.name_begin, id.name_end - id.name_begin); - state->committer_email = - xmemdupz(id.mail_begin, id.mail_end - id.mail_begin); -} - -/** - * Releases memory allocated by an am_state. - */ -static void am_state_release(struct am_state *state) -{ - free(state->dir); - free(state->author_name); - free(state->author_email); - free(state->author_date); - free(state->committer_name); - free(state->committer_email); - free(state->msg); - strvec_clear(&state->git_apply_opts); -} - -/** - * Returns path relative to the am_state directory. - */ -static inline const char *am_path(const struct am_state *state, const char *path) -{ - return mkpath("%s/%s", state->dir, path); -} - -/** - * For convenience to call write_file() - */ -static void write_state_text(const struct am_state *state, - const char *name, const char *string) -{ - write_file(am_path(state, name), "%s", string); -} - -static void write_state_count(const struct am_state *state, - const char *name, int value) -{ - write_file(am_path(state, name), "%d", value); -} - -static void write_state_bool(const struct am_state *state, - const char *name, int value) -{ - write_state_text(state, name, value ? "t" : "f"); -} - -/** - * If state->quiet is false, calls fprintf(fp, fmt, ...), and appends a newline - * at the end. - */ -static void say(const struct am_state *state, FILE *fp, const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - if (!state->quiet) { - vfprintf(fp, fmt, ap); - putc('\n', fp); - } - va_end(ap); -} - -/** - * Returns 1 if there is an am session in progress, 0 otherwise. - */ -static int am_in_progress(const struct am_state *state) -{ - struct stat st; - - if (lstat(state->dir, &st) < 0 || !S_ISDIR(st.st_mode)) - return 0; - if (lstat(am_path(state, "last"), &st) || !S_ISREG(st.st_mode)) - return 0; - if (lstat(am_path(state, "next"), &st) || !S_ISREG(st.st_mode)) - return 0; - return 1; -} - -/** - * Reads the contents of `file` in the `state` directory into `sb`. Returns the - * number of bytes read on success, -1 if the file does not exist. If `trim` is - * set, trailing whitespace will be removed. - */ -static int read_state_file(struct strbuf *sb, const struct am_state *state, - const char *file, int trim) -{ - strbuf_reset(sb); - - if (strbuf_read_file(sb, am_path(state, file), 0) >= 0) { - if (trim) - strbuf_trim(sb); - - return sb->len; - } - - if (errno == ENOENT) - return -1; - - die_errno(_("could not read '%s'"), am_path(state, file)); -} - -/** - * Reads and parses the state directory's "author-script" file, and sets - * state->author_name, state->author_email and state->author_date accordingly. - * Returns 0 on success, -1 if the file could not be parsed. - * - * The author script is of the format: - * - * GIT_AUTHOR_NAME='$author_name' - * GIT_AUTHOR_EMAIL='$author_email' - * GIT_AUTHOR_DATE='$author_date' - * - * where $author_name, $author_email and $author_date are quoted. We are strict - * with our parsing, as the file was meant to be eval'd in the old git-am.sh - * script, and thus if the file differs from what this function expects, it is - * better to bail out than to do something that the user does not expect. - */ -static int read_am_author_script(struct am_state *state) -{ - const char *filename = am_path(state, "author-script"); - - assert(!state->author_name); - assert(!state->author_email); - assert(!state->author_date); - - return read_author_script(filename, &state->author_name, - &state->author_email, &state->author_date, 1); -} - -/** - * Saves state->author_name, state->author_email and state->author_date in the - * state directory's "author-script" file. - */ -static void write_author_script(const struct am_state *state) -{ - struct strbuf sb = STRBUF_INIT; - - strbuf_addstr(&sb, "GIT_AUTHOR_NAME="); - sq_quote_buf(&sb, state->author_name); - strbuf_addch(&sb, '\n'); - - strbuf_addstr(&sb, "GIT_AUTHOR_EMAIL="); - sq_quote_buf(&sb, state->author_email); - strbuf_addch(&sb, '\n'); - - strbuf_addstr(&sb, "GIT_AUTHOR_DATE="); - sq_quote_buf(&sb, state->author_date); - strbuf_addch(&sb, '\n'); - - write_state_text(state, "author-script", sb.buf); - - strbuf_release(&sb); -} - -/** - * Reads the commit message from the state directory's "final-commit" file, - * setting state->msg to its contents and state->msg_len to the length of its - * contents in bytes. - * - * Returns 0 on success, -1 if the file does not exist. - */ -static int read_commit_msg(struct am_state *state) -{ - struct strbuf sb = STRBUF_INIT; - - assert(!state->msg); - - if (read_state_file(&sb, state, "final-commit", 0) < 0) { - strbuf_release(&sb); - return -1; - } - - state->msg = strbuf_detach(&sb, &state->msg_len); - return 0; -} - -/** - * Saves state->msg in the state directory's "final-commit" file. - */ -static void write_commit_msg(const struct am_state *state) -{ - const char *filename = am_path(state, "final-commit"); - write_file_buf(filename, state->msg, state->msg_len); -} - -/** - * Loads state from disk. - */ -static void am_load(struct am_state *state) -{ - struct strbuf sb = STRBUF_INIT; - - if (read_state_file(&sb, state, "next", 1) < 0) - BUG("state file 'next' does not exist"); - state->cur = strtol(sb.buf, NULL, 10); - - if (read_state_file(&sb, state, "last", 1) < 0) - BUG("state file 'last' does not exist"); - state->last = strtol(sb.buf, NULL, 10); - - if (read_am_author_script(state) < 0) - die(_("could not parse author script")); - - read_commit_msg(state); - - if (read_state_file(&sb, state, "original-commit", 1) < 0) - oidclr(&state->orig_commit); - else if (get_oid_hex(sb.buf, &state->orig_commit) < 0) - die(_("could not parse %s"), am_path(state, "original-commit")); - - read_state_file(&sb, state, "threeway", 1); - state->threeway = !strcmp(sb.buf, "t"); - - read_state_file(&sb, state, "quiet", 1); - state->quiet = !strcmp(sb.buf, "t"); - - read_state_file(&sb, state, "sign", 1); - state->signoff = !strcmp(sb.buf, "t"); - - read_state_file(&sb, state, "utf8", 1); - state->utf8 = !strcmp(sb.buf, "t"); - - if (file_exists(am_path(state, "rerere-autoupdate"))) { - read_state_file(&sb, state, "rerere-autoupdate", 1); - state->allow_rerere_autoupdate = strcmp(sb.buf, "t") ? - RERERE_NOAUTOUPDATE : RERERE_AUTOUPDATE; - } else { - state->allow_rerere_autoupdate = 0; - } - - read_state_file(&sb, state, "keep", 1); - if (!strcmp(sb.buf, "t")) - state->keep = KEEP_TRUE; - else if (!strcmp(sb.buf, "b")) - state->keep = KEEP_NON_PATCH; - else - state->keep = KEEP_FALSE; - - read_state_file(&sb, state, "messageid", 1); - state->message_id = !strcmp(sb.buf, "t"); - - read_state_file(&sb, state, "scissors", 1); - if (!strcmp(sb.buf, "t")) - state->scissors = SCISSORS_TRUE; - else if (!strcmp(sb.buf, "f")) - state->scissors = SCISSORS_FALSE; - else - state->scissors = SCISSORS_UNSET; - - read_state_file(&sb, state, "apply-opt", 1); - strvec_clear(&state->git_apply_opts); - if (sq_dequote_to_strvec(sb.buf, &state->git_apply_opts) < 0) - die(_("could not parse %s"), am_path(state, "apply-opt")); - - state->rebasing = !!file_exists(am_path(state, "rebasing")); - - strbuf_release(&sb); -} - -/** - * Removes the am_state directory, forcefully terminating the current am - * session. - */ -static void am_destroy(const struct am_state *state) -{ - struct strbuf sb = STRBUF_INIT; - - strbuf_addstr(&sb, state->dir); - remove_dir_recursively(&sb, 0); - strbuf_release(&sb); -} - -/** - * Runs applypatch-msg hook. Returns its exit code. - */ -static int run_applypatch_msg_hook(struct am_state *state) -{ - int ret; - - assert(state->msg); - ret = run_hook_le(NULL, "applypatch-msg", am_path(state, "final-commit"), NULL); - - if (!ret) { - FREE_AND_NULL(state->msg); - if (read_commit_msg(state) < 0) - die(_("'%s' was deleted by the applypatch-msg hook"), - am_path(state, "final-commit")); - } - - return ret; -} - -/** - * Runs post-rewrite hook. Returns it exit code. - */ -static int run_post_rewrite_hook(const struct am_state *state) -{ - struct child_process cp = CHILD_PROCESS_INIT; - const char *hook = find_hook("post-rewrite"); - int ret; - - if (!hook) - return 0; - - strvec_push(&cp.args, hook); - strvec_push(&cp.args, "rebase"); - - cp.in = xopen(am_path(state, "rewritten"), O_RDONLY); - cp.stdout_to_stderr = 1; - cp.trace2_hook_name = "post-rewrite"; - - ret = run_command(&cp); - - close(cp.in); - return ret; -} - -/** - * Reads the state directory's "rewritten" file, and copies notes from the old - * commits listed in the file to their rewritten commits. - * - * Returns 0 on success, -1 on failure. - */ -static int copy_notes_for_rebase(const struct am_state *state) -{ - struct notes_rewrite_cfg *c; - struct strbuf sb = STRBUF_INIT; - const char *invalid_line = _("Malformed input line: '%s'."); - const char *msg = "Notes added by 'git rebase'"; - FILE *fp; - int ret = 0; - - assert(state->rebasing); - - c = init_copy_notes_for_rewrite("rebase"); - if (!c) - return 0; - - fp = xfopen(am_path(state, "rewritten"), "r"); - - while (!strbuf_getline_lf(&sb, fp)) { - struct object_id from_obj, to_obj; - const char *p; - - if (sb.len != the_hash_algo->hexsz * 2 + 1) { - ret = error(invalid_line, sb.buf); - goto finish; - } - - if (parse_oid_hex(sb.buf, &from_obj, &p)) { - ret = error(invalid_line, sb.buf); - goto finish; - } - - if (*p != ' ') { - ret = error(invalid_line, sb.buf); - goto finish; - } - - if (get_oid_hex(p + 1, &to_obj)) { - ret = error(invalid_line, sb.buf); - goto finish; - } - - if (copy_note_for_rewrite(c, &from_obj, &to_obj)) - ret = error(_("Failed to copy notes from '%s' to '%s'"), - oid_to_hex(&from_obj), oid_to_hex(&to_obj)); - } - -finish: - finish_copy_notes_for_rewrite(the_repository, c, msg); - fclose(fp); - strbuf_release(&sb); - return ret; -} - -/** - * Determines if the file looks like a piece of RFC2822 mail by grabbing all - * non-indented lines and checking if they look like they begin with valid - * header field names. - * - * Returns 1 if the file looks like a piece of mail, 0 otherwise. - */ -static int is_mail(FILE *fp) -{ - const char *header_regex = "^[!-9;-~]+:"; - struct strbuf sb = STRBUF_INIT; - regex_t regex; - int ret = 1; - - if (fseek(fp, 0L, SEEK_SET)) - die_errno(_("fseek failed")); - - if (regcomp(®ex, header_regex, REG_NOSUB | REG_EXTENDED)) - die("invalid pattern: %s", header_regex); - - while (!strbuf_getline(&sb, fp)) { - if (!sb.len) - break; /* End of header */ - - /* Ignore indented folded lines */ - if (*sb.buf == '\t' || *sb.buf == ' ') - continue; - - /* It's a header if it matches header_regex */ - if (regexec(®ex, sb.buf, 0, NULL, 0)) { - ret = 0; - goto done; - } - } - -done: - regfree(®ex); - strbuf_release(&sb); - return ret; -} - -/** - * Attempts to detect the patch_format of the patches contained in `paths`, - * returning the PATCH_FORMAT_* enum value. Returns PATCH_FORMAT_UNKNOWN if - * detection fails. - */ -static int detect_patch_format(const char **paths) -{ - enum patch_format ret = PATCH_FORMAT_UNKNOWN; - struct strbuf l1 = STRBUF_INIT; - struct strbuf l2 = STRBUF_INIT; - struct strbuf l3 = STRBUF_INIT; - FILE *fp; - - /* - * We default to mbox format if input is from stdin and for directories - */ - if (!*paths || !strcmp(*paths, "-") || is_directory(*paths)) - return PATCH_FORMAT_MBOX; - - /* - * Otherwise, check the first few lines of the first patch, starting - * from the first non-blank line, to try to detect its format. - */ - - fp = xfopen(*paths, "r"); - - while (!strbuf_getline(&l1, fp)) { - if (l1.len) - break; - } - - if (starts_with(l1.buf, "From ") || starts_with(l1.buf, "From: ")) { - ret = PATCH_FORMAT_MBOX; - goto done; - } - - if (starts_with(l1.buf, "# This series applies on GIT commit")) { - ret = PATCH_FORMAT_STGIT_SERIES; - goto done; - } - - if (!strcmp(l1.buf, "# HG changeset patch")) { - ret = PATCH_FORMAT_HG; - goto done; - } - - strbuf_getline(&l2, fp); - strbuf_getline(&l3, fp); - - /* - * If the second line is empty and the third is a From, Author or Date - * entry, this is likely an StGit patch. - */ - if (l1.len && !l2.len && - (starts_with(l3.buf, "From:") || - starts_with(l3.buf, "Author:") || - starts_with(l3.buf, "Date:"))) { - ret = PATCH_FORMAT_STGIT; - goto done; - } - - if (l1.len && is_mail(fp)) { - ret = PATCH_FORMAT_MBOX; - goto done; - } - -done: - fclose(fp); - strbuf_release(&l1); - strbuf_release(&l2); - strbuf_release(&l3); - return ret; -} - -/** - * Splits out individual email patches from `paths`, where each path is either - * a mbox file or a Maildir. Returns 0 on success, -1 on failure. - */ -static int split_mail_mbox(struct am_state *state, const char **paths, - int keep_cr, int mboxrd) -{ - struct child_process cp = CHILD_PROCESS_INIT; - struct strbuf last = STRBUF_INIT; - int ret; - - cp.git_cmd = 1; - strvec_push(&cp.args, "mailsplit"); - strvec_pushf(&cp.args, "-d%d", state->prec); - strvec_pushf(&cp.args, "-o%s", state->dir); - strvec_push(&cp.args, "-b"); - if (keep_cr) - strvec_push(&cp.args, "--keep-cr"); - if (mboxrd) - strvec_push(&cp.args, "--mboxrd"); - strvec_push(&cp.args, "--"); - strvec_pushv(&cp.args, paths); - - ret = capture_command(&cp, &last, 8); - if (ret) - goto exit; - - state->cur = 1; - state->last = strtol(last.buf, NULL, 10); - -exit: - strbuf_release(&last); - return ret ? -1 : 0; -} - -/** - * Callback signature for split_mail_conv(). The foreign patch should be - * read from `in`, and the converted patch (in RFC2822 mail format) should be - * written to `out`. Return 0 on success, or -1 on failure. - */ -typedef int (*mail_conv_fn)(FILE *out, FILE *in, int keep_cr); - -/** - * Calls `fn` for each file in `paths` to convert the foreign patch to the - * RFC2822 mail format suitable for parsing with git-mailinfo. - * - * Returns 0 on success, -1 on failure. - */ -static int split_mail_conv(mail_conv_fn fn, struct am_state *state, - const char **paths, int keep_cr) -{ - static const char *stdin_only[] = {"-", NULL}; - int i; - - if (!*paths) - paths = stdin_only; - - for (i = 0; *paths; paths++, i++) { - FILE *in, *out; - const char *mail; - int ret; - - if (!strcmp(*paths, "-")) - in = stdin; - else - in = fopen(*paths, "r"); - - if (!in) - return error_errno(_("could not open '%s' for reading"), - *paths); - - mail = mkpath("%s/%0*d", state->dir, state->prec, i + 1); - - out = fopen(mail, "w"); - if (!out) { - if (in != stdin) - fclose(in); - return error_errno(_("could not open '%s' for writing"), - mail); - } - - ret = fn(out, in, keep_cr); - - fclose(out); - if (in != stdin) - fclose(in); - - if (ret) - return error(_("could not parse patch '%s'"), *paths); - } - - state->cur = 1; - state->last = i; - return 0; -} - -/** - * A split_mail_conv() callback that converts an StGit patch to an RFC2822 - * message suitable for parsing with git-mailinfo. - */ -static int stgit_patch_to_mail(FILE *out, FILE *in, int keep_cr) -{ - struct strbuf sb = STRBUF_INIT; - int subject_printed = 0; - - while (!strbuf_getline_lf(&sb, in)) { - const char *str; - - if (str_isspace(sb.buf)) - continue; - else if (skip_prefix(sb.buf, "Author:", &str)) - fprintf(out, "From:%s\n", str); - else if (starts_with(sb.buf, "From") || starts_with(sb.buf, "Date")) - fprintf(out, "%s\n", sb.buf); - else if (!subject_printed) { - fprintf(out, "Subject: %s\n", sb.buf); - subject_printed = 1; - } else { - fprintf(out, "\n%s\n", sb.buf); - break; - } - } - - strbuf_reset(&sb); - while (strbuf_fread(&sb, 8192, in) > 0) { - fwrite(sb.buf, 1, sb.len, out); - strbuf_reset(&sb); - } - - strbuf_release(&sb); - return 0; -} - -/** - * This function only supports a single StGit series file in `paths`. - * - * Given an StGit series file, converts the StGit patches in the series into - * RFC2822 messages suitable for parsing with git-mailinfo, and queues them in - * the state directory. - * - * Returns 0 on success, -1 on failure. - */ -static int split_mail_stgit_series(struct am_state *state, const char **paths, - int keep_cr) -{ - const char *series_dir; - char *series_dir_buf; - FILE *fp; - struct strvec patches = STRVEC_INIT; - struct strbuf sb = STRBUF_INIT; - int ret; - - if (!paths[0] || paths[1]) - return error(_("Only one StGIT patch series can be applied at once")); - - series_dir_buf = xstrdup(*paths); - series_dir = dirname(series_dir_buf); - - fp = fopen(*paths, "r"); - if (!fp) - return error_errno(_("could not open '%s' for reading"), *paths); - - while (!strbuf_getline_lf(&sb, fp)) { - if (*sb.buf == '#') - continue; /* skip comment lines */ - - strvec_push(&patches, mkpath("%s/%s", series_dir, sb.buf)); - } - - fclose(fp); - strbuf_release(&sb); - free(series_dir_buf); - - ret = split_mail_conv(stgit_patch_to_mail, state, patches.v, keep_cr); - - strvec_clear(&patches); - return ret; -} - -/** - * A split_patches_conv() callback that converts a mercurial patch to a RFC2822 - * message suitable for parsing with git-mailinfo. - */ -static int hg_patch_to_mail(FILE *out, FILE *in, int keep_cr) -{ - struct strbuf sb = STRBUF_INIT; - int rc = 0; - - while (!strbuf_getline_lf(&sb, in)) { - const char *str; - - if (skip_prefix(sb.buf, "# User ", &str)) - fprintf(out, "From: %s\n", str); - else if (skip_prefix(sb.buf, "# Date ", &str)) { - timestamp_t timestamp; - long tz, tz2; - char *end; - - errno = 0; - timestamp = parse_timestamp(str, &end, 10); - if (errno) { - rc = error(_("invalid timestamp")); - goto exit; - } - - if (!skip_prefix(end, " ", &str)) { - rc = error(_("invalid Date line")); - goto exit; - } - - errno = 0; - tz = strtol(str, &end, 10); - if (errno) { - rc = error(_("invalid timezone offset")); - goto exit; - } - - if (*end) { - rc = error(_("invalid Date line")); - goto exit; - } - - /* - * mercurial's timezone is in seconds west of UTC, - * however git's timezone is in hours + minutes east of - * UTC. Convert it. - */ - tz2 = labs(tz) / 3600 * 100 + labs(tz) % 3600 / 60; - if (tz > 0) - tz2 = -tz2; - - fprintf(out, "Date: %s\n", show_date(timestamp, tz2, DATE_MODE(RFC2822))); - } else if (starts_with(sb.buf, "# ")) { - continue; - } else { - fprintf(out, "\n%s\n", sb.buf); - break; - } - } - - strbuf_reset(&sb); - while (strbuf_fread(&sb, 8192, in) > 0) { - fwrite(sb.buf, 1, sb.len, out); - strbuf_reset(&sb); - } -exit: - strbuf_release(&sb); - return rc; -} - -/** - * Splits a list of files/directories into individual email patches. Each path - * in `paths` must be a file/directory that is formatted according to - * `patch_format`. - * - * Once split out, the individual email patches will be stored in the state - * directory, with each patch's filename being its index, padded to state->prec - * digits. - * - * state->cur will be set to the index of the first mail, and state->last will - * be set to the index of the last mail. - * - * Set keep_cr to 0 to convert all lines ending with \r\n to end with \n, 1 - * to disable this behavior, -1 to use the default configured setting. - * - * Returns 0 on success, -1 on failure. - */ -static int split_mail(struct am_state *state, enum patch_format patch_format, - const char **paths, int keep_cr) -{ - if (keep_cr < 0) { - keep_cr = 0; - git_config_get_bool("am.keepcr", &keep_cr); - } - - switch (patch_format) { - case PATCH_FORMAT_MBOX: - return split_mail_mbox(state, paths, keep_cr, 0); - case PATCH_FORMAT_STGIT: - return split_mail_conv(stgit_patch_to_mail, state, paths, keep_cr); - case PATCH_FORMAT_STGIT_SERIES: - return split_mail_stgit_series(state, paths, keep_cr); - case PATCH_FORMAT_HG: - return split_mail_conv(hg_patch_to_mail, state, paths, keep_cr); - case PATCH_FORMAT_MBOXRD: - return split_mail_mbox(state, paths, keep_cr, 1); - default: - BUG("invalid patch_format"); - } - return -1; -} - -/** - * Setup a new am session for applying patches - */ -static void am_setup(struct am_state *state, enum patch_format patch_format, - const char **paths, int keep_cr) -{ - struct object_id curr_head; - const char *str; - struct strbuf sb = STRBUF_INIT; - - if (!patch_format) - patch_format = detect_patch_format(paths); - - if (!patch_format) { - fprintf_ln(stderr, _("Patch format detection failed.")); - exit(128); - } - - if (mkdir(state->dir, 0777) < 0 && errno != EEXIST) - die_errno(_("failed to create directory '%s'"), state->dir); - delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF); - - if (split_mail(state, patch_format, paths, keep_cr) < 0) { - am_destroy(state); - die(_("Failed to split patches.")); - } - - if (state->rebasing) - state->threeway = 1; - - write_state_bool(state, "threeway", state->threeway); - write_state_bool(state, "quiet", state->quiet); - write_state_bool(state, "sign", state->signoff); - write_state_bool(state, "utf8", state->utf8); - - if (state->allow_rerere_autoupdate) - write_state_bool(state, "rerere-autoupdate", - state->allow_rerere_autoupdate == RERERE_AUTOUPDATE); - - switch (state->keep) { - case KEEP_FALSE: - str = "f"; - break; - case KEEP_TRUE: - str = "t"; - break; - case KEEP_NON_PATCH: - str = "b"; - break; - default: - BUG("invalid value for state->keep"); - } - - write_state_text(state, "keep", str); - write_state_bool(state, "messageid", state->message_id); - - switch (state->scissors) { - case SCISSORS_UNSET: - str = ""; - break; - case SCISSORS_FALSE: - str = "f"; - break; - case SCISSORS_TRUE: - str = "t"; - break; - default: - BUG("invalid value for state->scissors"); - } - write_state_text(state, "scissors", str); - - sq_quote_argv(&sb, state->git_apply_opts.v); - write_state_text(state, "apply-opt", sb.buf); - - if (state->rebasing) - write_state_text(state, "rebasing", ""); - else - write_state_text(state, "applying", ""); - - if (!get_oid("HEAD", &curr_head)) { - write_state_text(state, "abort-safety", oid_to_hex(&curr_head)); - if (!state->rebasing) - update_ref("am", "ORIG_HEAD", &curr_head, NULL, 0, - UPDATE_REFS_DIE_ON_ERR); - } else { - write_state_text(state, "abort-safety", ""); - if (!state->rebasing) - delete_ref(NULL, "ORIG_HEAD", NULL, 0); - } - - /* - * NOTE: Since the "next" and "last" files determine if an am_state - * session is in progress, they should be written last. - */ - - write_state_count(state, "next", state->cur); - write_state_count(state, "last", state->last); - - strbuf_release(&sb); -} - -/** - * Increments the patch pointer, and cleans am_state for the application of the - * next patch. - */ -static void am_next(struct am_state *state) -{ - struct object_id head; - - FREE_AND_NULL(state->author_name); - FREE_AND_NULL(state->author_email); - FREE_AND_NULL(state->author_date); - FREE_AND_NULL(state->msg); - state->msg_len = 0; - - unlink(am_path(state, "author-script")); - unlink(am_path(state, "final-commit")); - - oidclr(&state->orig_commit); - unlink(am_path(state, "original-commit")); - delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF); - - if (!get_oid("HEAD", &head)) - write_state_text(state, "abort-safety", oid_to_hex(&head)); - else - write_state_text(state, "abort-safety", ""); - - state->cur++; - write_state_count(state, "next", state->cur); -} - -/** - * Returns the filename of the current patch email. - */ -static const char *msgnum(const struct am_state *state) -{ - static struct strbuf sb = STRBUF_INIT; - - strbuf_reset(&sb); - strbuf_addf(&sb, "%0*d", state->prec, state->cur); - - return sb.buf; -} - -/** - * Dies with a user-friendly message on how to proceed after resolving the - * problem. This message can be overridden with state->resolvemsg. - */ -static void NORETURN die_user_resolve(const struct am_state *state) -{ - if (state->resolvemsg) { - printf_ln("%s", state->resolvemsg); - } else { - const char *cmdline = state->interactive ? "git am -i" : "git am"; - - printf_ln(_("When you have resolved this problem, run \"%s --continue\"."), cmdline); - printf_ln(_("If you prefer to skip this patch, run \"%s --skip\" instead."), cmdline); - printf_ln(_("To restore the original branch and stop patching, run \"%s --abort\"."), cmdline); - } - - exit(128); -} - -/** - * Appends signoff to the "msg" field of the am_state. - */ -static void am_append_signoff(struct am_state *state) -{ - struct strbuf sb = STRBUF_INIT; - - strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len); - append_signoff(&sb, 0, 0); - state->msg = strbuf_detach(&sb, &state->msg_len); -} - -/** - * Parses `mail` using git-mailinfo, extracting its patch and authorship info. - * state->msg will be set to the patch message. state->author_name, - * state->author_email and state->author_date will be set to the patch author's - * name, email and date respectively. The patch body will be written to the - * state directory's "patch" file. - * - * Returns 1 if the patch should be skipped, 0 otherwise. - */ -static int parse_mail(struct am_state *state, const char *mail) -{ - FILE *fp; - struct strbuf sb = STRBUF_INIT; - struct strbuf msg = STRBUF_INIT; - struct strbuf author_name = STRBUF_INIT; - struct strbuf author_date = STRBUF_INIT; - struct strbuf author_email = STRBUF_INIT; - int ret = 0; - struct mailinfo mi; - - setup_mailinfo(&mi); - - if (state->utf8) - mi.metainfo_charset = get_commit_output_encoding(); - else - mi.metainfo_charset = NULL; - - switch (state->keep) { - case KEEP_FALSE: - break; - case KEEP_TRUE: - mi.keep_subject = 1; - break; - case KEEP_NON_PATCH: - mi.keep_non_patch_brackets_in_subject = 1; - break; - default: - BUG("invalid value for state->keep"); - } - - if (state->message_id) - mi.add_message_id = 1; - - switch (state->scissors) { - case SCISSORS_UNSET: - break; - case SCISSORS_FALSE: - mi.use_scissors = 0; - break; - case SCISSORS_TRUE: - mi.use_scissors = 1; - break; - default: - BUG("invalid value for state->scissors"); - } - - mi.input = xfopen(mail, "r"); - mi.output = xfopen(am_path(state, "info"), "w"); - if (mailinfo(&mi, am_path(state, "msg"), am_path(state, "patch"))) - die("could not parse patch"); - - fclose(mi.input); - fclose(mi.output); - - if (mi.format_flowed) - warning(_("Patch sent with format=flowed; " - "space at the end of lines might be lost.")); - - /* Extract message and author information */ - fp = xfopen(am_path(state, "info"), "r"); - while (!strbuf_getline_lf(&sb, fp)) { - const char *x; - - if (skip_prefix(sb.buf, "Subject: ", &x)) { - if (msg.len) - strbuf_addch(&msg, '\n'); - strbuf_addstr(&msg, x); - } else if (skip_prefix(sb.buf, "Author: ", &x)) - strbuf_addstr(&author_name, x); - else if (skip_prefix(sb.buf, "Email: ", &x)) - strbuf_addstr(&author_email, x); - else if (skip_prefix(sb.buf, "Date: ", &x)) - strbuf_addstr(&author_date, x); - } - fclose(fp); - - /* Skip pine's internal folder data */ - if (!strcmp(author_name.buf, "Mail System Internal Data")) { - ret = 1; - goto finish; - } - - if (is_empty_or_missing_file(am_path(state, "patch"))) { - printf_ln(_("Patch is empty.")); - die_user_resolve(state); - } - - strbuf_addstr(&msg, "\n\n"); - strbuf_addbuf(&msg, &mi.log_message); - strbuf_stripspace(&msg, 0); - - assert(!state->author_name); - state->author_name = strbuf_detach(&author_name, NULL); - - assert(!state->author_email); - state->author_email = strbuf_detach(&author_email, NULL); - - assert(!state->author_date); - state->author_date = strbuf_detach(&author_date, NULL); - - assert(!state->msg); - state->msg = strbuf_detach(&msg, &state->msg_len); - -finish: - strbuf_release(&msg); - strbuf_release(&author_date); - strbuf_release(&author_email); - strbuf_release(&author_name); - strbuf_release(&sb); - clear_mailinfo(&mi); - return ret; -} - -/** - * Sets commit_id to the commit hash where the mail was generated from. - * Returns 0 on success, -1 on failure. - */ -static int get_mail_commit_oid(struct object_id *commit_id, const char *mail) -{ - struct strbuf sb = STRBUF_INIT; - FILE *fp = xfopen(mail, "r"); - const char *x; - int ret = 0; - - if (strbuf_getline_lf(&sb, fp) || - !skip_prefix(sb.buf, "From ", &x) || - get_oid_hex(x, commit_id) < 0) - ret = -1; - - strbuf_release(&sb); - fclose(fp); - return ret; -} - -/** - * Sets state->msg, state->author_name, state->author_email, state->author_date - * to the commit's respective info. - */ -static void get_commit_info(struct am_state *state, struct commit *commit) -{ - const char *buffer, *ident_line, *msg; - size_t ident_len; - struct ident_split id; - - buffer = logmsg_reencode(commit, NULL, get_commit_output_encoding()); - - ident_line = find_commit_header(buffer, "author", &ident_len); - if (!ident_line) - die(_("missing author line in commit %s"), - oid_to_hex(&commit->object.oid)); - if (split_ident_line(&id, ident_line, ident_len) < 0) - die(_("invalid ident line: %.*s"), (int)ident_len, ident_line); - - assert(!state->author_name); - if (id.name_begin) - state->author_name = - xmemdupz(id.name_begin, id.name_end - id.name_begin); - else - state->author_name = xstrdup(""); - - assert(!state->author_email); - if (id.mail_begin) - state->author_email = - xmemdupz(id.mail_begin, id.mail_end - id.mail_begin); - else - state->author_email = xstrdup(""); - - assert(!state->author_date); - state->author_date = xstrdup(show_ident_date(&id, DATE_MODE(NORMAL))); - - assert(!state->msg); - msg = strstr(buffer, "\n\n"); - if (!msg) - die(_("unable to parse commit %s"), oid_to_hex(&commit->object.oid)); - state->msg = xstrdup(msg + 2); - state->msg_len = strlen(state->msg); - unuse_commit_buffer(commit, buffer); -} - -/** - * Writes `commit` as a patch to the state directory's "patch" file. - */ -static void write_commit_patch(const struct am_state *state, struct commit *commit) -{ - struct rev_info rev_info; - FILE *fp; - - fp = xfopen(am_path(state, "patch"), "w"); - repo_init_revisions(the_repository, &rev_info, NULL); - rev_info.diff = 1; - rev_info.abbrev = 0; - rev_info.disable_stdin = 1; - rev_info.show_root_diff = 1; - rev_info.diffopt.output_format = DIFF_FORMAT_PATCH; - rev_info.no_commit_id = 1; - rev_info.diffopt.flags.binary = 1; - rev_info.diffopt.flags.full_index = 1; - rev_info.diffopt.use_color = 0; - rev_info.diffopt.file = fp; - rev_info.diffopt.close_file = 1; - add_pending_object(&rev_info, &commit->object, ""); - diff_setup_done(&rev_info.diffopt); - log_tree_commit(&rev_info, commit); -} - -/** - * Writes the diff of the index against HEAD as a patch to the state - * directory's "patch" file. - */ -static void write_index_patch(const struct am_state *state) -{ - struct tree *tree; - struct object_id head; - struct rev_info rev_info; - FILE *fp; - - if (!get_oid("HEAD", &head)) { - struct commit *commit = lookup_commit_or_die(&head, "HEAD"); - tree = get_commit_tree(commit); - } else - tree = lookup_tree(the_repository, - the_repository->hash_algo->empty_tree); - - fp = xfopen(am_path(state, "patch"), "w"); - repo_init_revisions(the_repository, &rev_info, NULL); - rev_info.diff = 1; - rev_info.disable_stdin = 1; - rev_info.no_commit_id = 1; - rev_info.diffopt.output_format = DIFF_FORMAT_PATCH; - rev_info.diffopt.use_color = 0; - rev_info.diffopt.file = fp; - rev_info.diffopt.close_file = 1; - add_pending_object(&rev_info, &tree->object, ""); - diff_setup_done(&rev_info.diffopt); - run_diff_index(&rev_info, 1); -} - -/** - * Like parse_mail(), but parses the mail by looking up its commit ID - * directly. This is used in --rebasing mode to bypass git-mailinfo's munging - * of patches. - * - * state->orig_commit will be set to the original commit ID. - * - * Will always return 0 as the patch should never be skipped. - */ -static int parse_mail_rebase(struct am_state *state, const char *mail) -{ - struct commit *commit; - struct object_id commit_oid; - - if (get_mail_commit_oid(&commit_oid, mail) < 0) - die(_("could not parse %s"), mail); - - commit = lookup_commit_or_die(&commit_oid, mail); - - get_commit_info(state, commit); - - write_commit_patch(state, commit); - - oidcpy(&state->orig_commit, &commit_oid); - write_state_text(state, "original-commit", oid_to_hex(&commit_oid)); - update_ref("am", "REBASE_HEAD", &commit_oid, - NULL, REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR); - - return 0; -} - -/** - * Applies current patch with git-apply. Returns 0 on success, -1 otherwise. If - * `index_file` is not NULL, the patch will be applied to that index. - */ -static int run_apply(const struct am_state *state, const char *index_file) -{ - struct strvec apply_paths = STRVEC_INIT; - struct strvec apply_opts = STRVEC_INIT; - struct apply_state apply_state; - int res, opts_left; - int force_apply = 0; - int options = 0; - - if (init_apply_state(&apply_state, the_repository, NULL)) - BUG("init_apply_state() failed"); - - strvec_push(&apply_opts, "apply"); - strvec_pushv(&apply_opts, state->git_apply_opts.v); - - opts_left = apply_parse_options(apply_opts.nr, apply_opts.v, - &apply_state, &force_apply, &options, - NULL); - - if (opts_left != 0) - die("unknown option passed through to git apply"); - - if (index_file) { - apply_state.index_file = index_file; - apply_state.cached = 1; - } else - apply_state.check_index = 1; - - /* - * If we are allowed to fall back on 3-way merge, don't give false - * errors during the initial attempt. - */ - if (state->threeway && !index_file) - apply_state.apply_verbosity = verbosity_silent; - - if (check_apply_state(&apply_state, force_apply)) - BUG("check_apply_state() failed"); - - strvec_push(&apply_paths, am_path(state, "patch")); - - res = apply_all_patches(&apply_state, apply_paths.nr, apply_paths.v, options); - - strvec_clear(&apply_paths); - strvec_clear(&apply_opts); - clear_apply_state(&apply_state); - - if (res) - return res; - - if (index_file) { - /* Reload index as apply_all_patches() will have modified it. */ - discard_cache(); - read_cache_from(index_file); - } - - return 0; -} - -/** - * Builds an index that contains just the blobs needed for a 3way merge. - */ -static int build_fake_ancestor(const struct am_state *state, const char *index_file) -{ - struct child_process cp = CHILD_PROCESS_INIT; - - cp.git_cmd = 1; - strvec_push(&cp.args, "apply"); - strvec_pushv(&cp.args, state->git_apply_opts.v); - strvec_pushf(&cp.args, "--build-fake-ancestor=%s", index_file); - strvec_push(&cp.args, am_path(state, "patch")); - - if (run_command(&cp)) - return -1; - - return 0; -} - -/** - * Attempt a threeway merge, using index_path as the temporary index. - */ -static int fall_back_threeway(const struct am_state *state, const char *index_path) -{ - struct object_id orig_tree, their_tree, our_tree; - const struct object_id *bases[1] = { &orig_tree }; - struct merge_options o; - struct commit *result; - char *their_tree_name; - - if (get_oid("HEAD", &our_tree) < 0) - oidcpy(&our_tree, the_hash_algo->empty_tree); - - if (build_fake_ancestor(state, index_path)) - return error("could not build fake ancestor"); - - discard_cache(); - read_cache_from(index_path); - - if (write_index_as_tree(&orig_tree, &the_index, index_path, 0, NULL)) - return error(_("Repository lacks necessary blobs to fall back on 3-way merge.")); - - say(state, stdout, _("Using index info to reconstruct a base tree...")); - - if (!state->quiet) { - /* - * List paths that needed 3-way fallback, so that the user can - * review them with extra care to spot mismerges. - */ - struct rev_info rev_info; - - repo_init_revisions(the_repository, &rev_info, NULL); - rev_info.diffopt.output_format = DIFF_FORMAT_NAME_STATUS; - rev_info.diffopt.filter |= diff_filter_bit('A'); - rev_info.diffopt.filter |= diff_filter_bit('M'); - add_pending_oid(&rev_info, "HEAD", &our_tree, 0); - diff_setup_done(&rev_info.diffopt); - run_diff_index(&rev_info, 1); - } - - if (run_apply(state, index_path)) - return error(_("Did you hand edit your patch?\n" - "It does not apply to blobs recorded in its index.")); - - if (write_index_as_tree(&their_tree, &the_index, index_path, 0, NULL)) - return error("could not write tree"); - - say(state, stdout, _("Falling back to patching base and 3-way merge...")); - - discard_cache(); - read_cache(); - - /* - * This is not so wrong. Depending on which base we picked, orig_tree - * may be wildly different from ours, but their_tree has the same set of - * wildly different changes in parts the patch did not touch, so - * recursive ends up canceling them, saying that we reverted all those - * changes. - */ - - init_merge_options(&o, the_repository); - - o.branch1 = "HEAD"; - their_tree_name = xstrfmt("%.*s", linelen(state->msg), state->msg); - o.branch2 = their_tree_name; - o.detect_directory_renames = MERGE_DIRECTORY_RENAMES_NONE; - - if (state->quiet) - o.verbosity = 0; - - if (merge_recursive_generic(&o, &our_tree, &their_tree, 1, bases, &result)) { - repo_rerere(the_repository, state->allow_rerere_autoupdate); - free(their_tree_name); - return error(_("Failed to merge in the changes.")); - } - - free(their_tree_name); - return 0; -} - -/** - * Commits the current index with state->msg as the commit message and - * state->author_name, state->author_email and state->author_date as the author - * information. - */ -static void do_commit(const struct am_state *state) -{ - struct object_id tree, parent, commit; - const struct object_id *old_oid; - struct commit_list *parents = NULL; - const char *reflog_msg, *author, *committer = NULL; - struct strbuf sb = STRBUF_INIT; - - if (run_hook_le(NULL, "pre-applypatch", NULL)) - exit(1); - - if (write_cache_as_tree(&tree, 0, NULL)) - die(_("git write-tree failed to write a tree")); - - if (!get_oid_commit("HEAD", &parent)) { - old_oid = &parent; - commit_list_insert(lookup_commit(the_repository, &parent), - &parents); - } else { - old_oid = NULL; - say(state, stderr, _("applying to an empty history")); - } - - author = fmt_ident(state->author_name, state->author_email, - WANT_AUTHOR_IDENT, - state->ignore_date ? NULL : state->author_date, - IDENT_STRICT); - - if (state->committer_date_is_author_date) - committer = fmt_ident(state->committer_name, - state->committer_email, WANT_COMMITTER_IDENT, - state->ignore_date ? NULL - : state->author_date, - IDENT_STRICT); - - if (commit_tree_extended(state->msg, state->msg_len, &tree, parents, - &commit, author, committer, state->sign_commit, - NULL)) - die(_("failed to write commit object")); - - reflog_msg = getenv("GIT_REFLOG_ACTION"); - if (!reflog_msg) - reflog_msg = "am"; - - strbuf_addf(&sb, "%s: %.*s", reflog_msg, linelen(state->msg), - state->msg); - - update_ref(sb.buf, "HEAD", &commit, old_oid, 0, - UPDATE_REFS_DIE_ON_ERR); - - if (state->rebasing) { - FILE *fp = xfopen(am_path(state, "rewritten"), "a"); - - assert(!is_null_oid(&state->orig_commit)); - fprintf(fp, "%s ", oid_to_hex(&state->orig_commit)); - fprintf(fp, "%s\n", oid_to_hex(&commit)); - fclose(fp); - } - - run_hook_le(NULL, "post-applypatch", NULL); - - strbuf_release(&sb); -} - -/** - * Validates the am_state for resuming -- the "msg" and authorship fields must - * be filled up. - */ -static void validate_resume_state(const struct am_state *state) -{ - if (!state->msg) - die(_("cannot resume: %s does not exist."), - am_path(state, "final-commit")); - - if (!state->author_name || !state->author_email || !state->author_date) - die(_("cannot resume: %s does not exist."), - am_path(state, "author-script")); -} - -/** - * Interactively prompt the user on whether the current patch should be - * applied. - * - * Returns 0 if the user chooses to apply the patch, 1 if the user chooses to - * skip it. - */ -static int do_interactive(struct am_state *state) -{ - assert(state->msg); - - for (;;) { - char reply[64]; - - puts(_("Commit Body is:")); - puts("--------------------------"); - printf("%s", state->msg); - puts("--------------------------"); - - /* - * TRANSLATORS: Make sure to include [y], [n], [e], [v] and [a] - * in your translation. The program will only accept English - * input at this point. - */ - printf(_("Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all: ")); - if (!fgets(reply, sizeof(reply), stdin)) - die("unable to read from stdin; aborting"); - - if (*reply == 'y' || *reply == 'Y') { - return 0; - } else if (*reply == 'a' || *reply == 'A') { - state->interactive = 0; - return 0; - } else if (*reply == 'n' || *reply == 'N') { - return 1; - } else if (*reply == 'e' || *reply == 'E') { - struct strbuf msg = STRBUF_INIT; - - if (!launch_editor(am_path(state, "final-commit"), &msg, NULL)) { - free(state->msg); - state->msg = strbuf_detach(&msg, &state->msg_len); - } - strbuf_release(&msg); - } else if (*reply == 'v' || *reply == 'V') { - const char *pager = git_pager(1); - struct child_process cp = CHILD_PROCESS_INIT; - - if (!pager) - pager = "cat"; - prepare_pager_args(&cp, pager); - strvec_push(&cp.args, am_path(state, "patch")); - run_command(&cp); - } - } -} - -/** - * Applies all queued mail. - * - * If `resume` is true, we are "resuming". The "msg" and authorship fields, as - * well as the state directory's "patch" file is used as-is for applying the - * patch and committing it. - */ -static void am_run(struct am_state *state, int resume) -{ - struct strbuf sb = STRBUF_INIT; - - unlink(am_path(state, "dirtyindex")); - - if (refresh_and_write_cache(REFRESH_QUIET, 0, 0) < 0) - die(_("unable to write index file")); - - if (repo_index_has_changes(the_repository, NULL, &sb)) { - write_state_bool(state, "dirtyindex", 1); - die(_("Dirty index: cannot apply patches (dirty: %s)"), sb.buf); - } - - strbuf_release(&sb); - - while (state->cur <= state->last) { - const char *mail = am_path(state, msgnum(state)); - int apply_status; - - reset_ident_date(); - - if (!file_exists(mail)) - goto next; - - if (resume) { - validate_resume_state(state); - } else { - int skip; - - if (state->rebasing) - skip = parse_mail_rebase(state, mail); - else - skip = parse_mail(state, mail); - - if (skip) - goto next; /* mail should be skipped */ - - if (state->signoff) - am_append_signoff(state); - - write_author_script(state); - write_commit_msg(state); - } - - if (state->interactive && do_interactive(state)) - goto next; - - if (run_applypatch_msg_hook(state)) - exit(1); - - say(state, stdout, _("Applying: %.*s"), linelen(state->msg), state->msg); - - apply_status = run_apply(state, NULL); - - if (apply_status && state->threeway) { - struct strbuf sb = STRBUF_INIT; - - strbuf_addstr(&sb, am_path(state, "patch-merge-index")); - apply_status = fall_back_threeway(state, sb.buf); - strbuf_release(&sb); - - /* - * Applying the patch to an earlier tree and merging - * the result may have produced the same tree as ours. - */ - if (!apply_status && - !repo_index_has_changes(the_repository, NULL, NULL)) { - say(state, stdout, _("No changes -- Patch already applied.")); - goto next; - } - } - - if (apply_status) { - printf_ln(_("Patch failed at %s %.*s"), msgnum(state), - linelen(state->msg), state->msg); - - if (advice_amworkdir) - advise(_("Use 'git am --show-current-patch=diff' to see the failed patch")); - - die_user_resolve(state); - } - - do_commit(state); - -next: - am_next(state); - - if (resume) - am_load(state); - resume = 0; - } - - if (!is_empty_or_missing_file(am_path(state, "rewritten"))) { - assert(state->rebasing); - copy_notes_for_rebase(state); - run_post_rewrite_hook(state); - } - - /* - * In rebasing mode, it's up to the caller to take care of - * housekeeping. - */ - if (!state->rebasing) { - am_destroy(state); - close_object_store(the_repository->objects); - run_auto_maintenance(state->quiet); - } -} - -/** - * Resume the current am session after patch application failure. The user did - * all the hard work, and we do not have to do any patch application. Just - * trust and commit what the user has in the index and working tree. - */ -static void am_resolve(struct am_state *state) -{ - validate_resume_state(state); - - say(state, stdout, _("Applying: %.*s"), linelen(state->msg), state->msg); - - if (!repo_index_has_changes(the_repository, NULL, NULL)) { - printf_ln(_("No changes - did you forget to use 'git add'?\n" - "If there is nothing left to stage, chances are that something else\n" - "already introduced the same changes; you might want to skip this patch.")); - die_user_resolve(state); - } - - if (unmerged_cache()) { - printf_ln(_("You still have unmerged paths in your index.\n" - "You should 'git add' each file with resolved conflicts to mark them as such.\n" - "You might run `git rm` on a file to accept \"deleted by them\" for it.")); - die_user_resolve(state); - } - - if (state->interactive) { - write_index_patch(state); - if (do_interactive(state)) - goto next; - } - - repo_rerere(the_repository, 0); - - do_commit(state); - -next: - am_next(state); - am_load(state); - am_run(state, 0); -} - -/** - * Performs a checkout fast-forward from `head` to `remote`. If `reset` is - * true, any unmerged entries will be discarded. Returns 0 on success, -1 on - * failure. - */ -static int fast_forward_to(struct tree *head, struct tree *remote, int reset) -{ - struct lock_file lock_file = LOCK_INIT; - struct unpack_trees_options opts; - struct tree_desc t[2]; - - if (parse_tree(head) || parse_tree(remote)) - return -1; - - hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR); - - refresh_cache(REFRESH_QUIET); - - memset(&opts, 0, sizeof(opts)); - opts.head_idx = 1; - opts.src_index = &the_index; - opts.dst_index = &the_index; - opts.update = 1; - opts.merge = 1; - opts.reset = reset; - opts.fn = twoway_merge; - init_tree_desc(&t[0], head->buffer, head->size); - init_tree_desc(&t[1], remote->buffer, remote->size); - - if (unpack_trees(2, t, &opts)) { - rollback_lock_file(&lock_file); - return -1; - } - - if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) - die(_("unable to write new index file")); - - return 0; -} - -/** - * Merges a tree into the index. The index's stat info will take precedence - * over the merged tree's. Returns 0 on success, -1 on failure. - */ -static int merge_tree(struct tree *tree) -{ - struct lock_file lock_file = LOCK_INIT; - struct unpack_trees_options opts; - struct tree_desc t[1]; - - if (parse_tree(tree)) - return -1; - - hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR); - - memset(&opts, 0, sizeof(opts)); - opts.head_idx = 1; - opts.src_index = &the_index; - opts.dst_index = &the_index; - opts.merge = 1; - opts.fn = oneway_merge; - init_tree_desc(&t[0], tree->buffer, tree->size); - - if (unpack_trees(1, t, &opts)) { - rollback_lock_file(&lock_file); - return -1; - } - - if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) - die(_("unable to write new index file")); - - return 0; -} - -/** - * Clean the index without touching entries that are not modified between - * `head` and `remote`. - */ -static int clean_index(const struct object_id *head, const struct object_id *remote) -{ - struct tree *head_tree, *remote_tree, *index_tree; - struct object_id index; - - head_tree = parse_tree_indirect(head); - if (!head_tree) - return error(_("Could not parse object '%s'."), oid_to_hex(head)); - - remote_tree = parse_tree_indirect(remote); - if (!remote_tree) - return error(_("Could not parse object '%s'."), oid_to_hex(remote)); - - read_cache_unmerged(); - - if (fast_forward_to(head_tree, head_tree, 1)) - return -1; - - if (write_cache_as_tree(&index, 0, NULL)) - return -1; - - index_tree = parse_tree_indirect(&index); - if (!index_tree) - return error(_("Could not parse object '%s'."), oid_to_hex(&index)); - - if (fast_forward_to(index_tree, remote_tree, 0)) - return -1; - - if (merge_tree(remote_tree)) - return -1; - - remove_branch_state(the_repository, 0); - - return 0; -} - -/** - * Resets rerere's merge resolution metadata. - */ -static void am_rerere_clear(void) -{ - struct string_list merge_rr = STRING_LIST_INIT_DUP; - rerere_clear(the_repository, &merge_rr); - string_list_clear(&merge_rr, 1); -} - -/** - * Resume the current am session by skipping the current patch. - */ -static void am_skip(struct am_state *state) -{ - struct object_id head; - - am_rerere_clear(); - - if (get_oid("HEAD", &head)) - oidcpy(&head, the_hash_algo->empty_tree); - - if (clean_index(&head, &head)) - die(_("failed to clean index")); - - if (state->rebasing) { - FILE *fp = xfopen(am_path(state, "rewritten"), "a"); - - assert(!is_null_oid(&state->orig_commit)); - fprintf(fp, "%s ", oid_to_hex(&state->orig_commit)); - fprintf(fp, "%s\n", oid_to_hex(&head)); - fclose(fp); - } - - am_next(state); - am_load(state); - am_run(state, 0); -} - -/** - * Returns true if it is safe to reset HEAD to the ORIG_HEAD, false otherwise. - * - * It is not safe to reset HEAD when: - * 1. git-am previously failed because the index was dirty. - * 2. HEAD has moved since git-am previously failed. - */ -static int safe_to_abort(const struct am_state *state) -{ - struct strbuf sb = STRBUF_INIT; - struct object_id abort_safety, head; - - if (file_exists(am_path(state, "dirtyindex"))) - return 0; - - if (read_state_file(&sb, state, "abort-safety", 1) > 0) { - if (get_oid_hex(sb.buf, &abort_safety)) - die(_("could not parse %s"), am_path(state, "abort-safety")); - } else - oidclr(&abort_safety); - strbuf_release(&sb); - - if (get_oid("HEAD", &head)) - oidclr(&head); - - if (oideq(&head, &abort_safety)) - return 1; - - warning(_("You seem to have moved HEAD since the last 'am' failure.\n" - "Not rewinding to ORIG_HEAD")); - - return 0; -} - -/** - * Aborts the current am session if it is safe to do so. - */ -static void am_abort(struct am_state *state) -{ - struct object_id curr_head, orig_head; - int has_curr_head, has_orig_head; - char *curr_branch; - - if (!safe_to_abort(state)) { - am_destroy(state); - return; - } - - am_rerere_clear(); - - curr_branch = resolve_refdup("HEAD", 0, &curr_head, NULL); - has_curr_head = curr_branch && !is_null_oid(&curr_head); - if (!has_curr_head) - oidcpy(&curr_head, the_hash_algo->empty_tree); - - has_orig_head = !get_oid("ORIG_HEAD", &orig_head); - if (!has_orig_head) - oidcpy(&orig_head, the_hash_algo->empty_tree); - - clean_index(&curr_head, &orig_head); - - if (has_orig_head) - update_ref("am --abort", "HEAD", &orig_head, - has_curr_head ? &curr_head : NULL, 0, - UPDATE_REFS_DIE_ON_ERR); - else if (curr_branch) - delete_ref(NULL, curr_branch, NULL, REF_NO_DEREF); - - free(curr_branch); - am_destroy(state); -} - -static int show_patch(struct am_state *state, enum show_patch_type sub_mode) -{ - struct strbuf sb = STRBUF_INIT; - const char *patch_path; - int len; - - if (!is_null_oid(&state->orig_commit)) { - const char *av[4] = { "show", NULL, "--", NULL }; - char *new_oid_str; - int ret; - - av[1] = new_oid_str = xstrdup(oid_to_hex(&state->orig_commit)); - ret = run_command_v_opt(av, RUN_GIT_CMD); - free(new_oid_str); - return ret; - } - - switch (sub_mode) { - case SHOW_PATCH_RAW: - patch_path = am_path(state, msgnum(state)); - break; - case SHOW_PATCH_DIFF: - patch_path = am_path(state, "patch"); - break; - default: - BUG("invalid mode for --show-current-patch"); - } - - len = strbuf_read_file(&sb, patch_path, 0); - if (len < 0) - die_errno(_("failed to read '%s'"), patch_path); - - setup_pager(); - write_in_full(1, sb.buf, sb.len); - strbuf_release(&sb); - return 0; -} - -/** - * parse_options() callback that validates and sets opt->value to the - * PATCH_FORMAT_* enum value corresponding to `arg`. - */ -static int parse_opt_patchformat(const struct option *opt, const char *arg, int unset) -{ - int *opt_value = opt->value; - - if (unset) - *opt_value = PATCH_FORMAT_UNKNOWN; - else if (!strcmp(arg, "mbox")) - *opt_value = PATCH_FORMAT_MBOX; - else if (!strcmp(arg, "stgit")) - *opt_value = PATCH_FORMAT_STGIT; - else if (!strcmp(arg, "stgit-series")) - *opt_value = PATCH_FORMAT_STGIT_SERIES; - else if (!strcmp(arg, "hg")) - *opt_value = PATCH_FORMAT_HG; - else if (!strcmp(arg, "mboxrd")) - *opt_value = PATCH_FORMAT_MBOXRD; - /* - * Please update $__git_patchformat in git-completion.bash - * when you add new options - */ - else - return error(_("Invalid value for --patch-format: %s"), arg); - return 0; -} - -enum resume_type { - RESUME_FALSE = 0, - RESUME_APPLY, - RESUME_RESOLVED, - RESUME_SKIP, - RESUME_ABORT, - RESUME_QUIT, - RESUME_SHOW_PATCH -}; - -struct resume_mode { - enum resume_type mode; - enum show_patch_type sub_mode; -}; - -static int parse_opt_show_current_patch(const struct option *opt, const char *arg, int unset) -{ - int *opt_value = opt->value; - struct resume_mode *resume = container_of(opt_value, struct resume_mode, mode); - - /* - * Please update $__git_showcurrentpatch in git-completion.bash - * when you add new options - */ - const char *valid_modes[] = { - [SHOW_PATCH_DIFF] = "diff", - [SHOW_PATCH_RAW] = "raw" - }; - int new_value = SHOW_PATCH_RAW; - - BUG_ON_OPT_NEG(unset); - - if (arg) { - for (new_value = 0; new_value < ARRAY_SIZE(valid_modes); new_value++) { - if (!strcmp(arg, valid_modes[new_value])) - break; - } - if (new_value >= ARRAY_SIZE(valid_modes)) - return error(_("Invalid value for --show-current-patch: %s"), arg); - } - - if (resume->mode == RESUME_SHOW_PATCH && new_value != resume->sub_mode) - return error(_("--show-current-patch=%s is incompatible with " - "--show-current-patch=%s"), - arg, valid_modes[resume->sub_mode]); - - resume->mode = RESUME_SHOW_PATCH; - resume->sub_mode = new_value; - return 0; -} - -static int git_am_config(const char *k, const char *v, void *cb) -{ - int status; - - status = git_gpg_config(k, v, NULL); - if (status) - return status; - - return git_default_config(k, v, NULL); -} - -int cmd_am(int argc, const char **argv, const char *prefix) -{ - struct am_state state; - int binary = -1; - int keep_cr = -1; - int patch_format = PATCH_FORMAT_UNKNOWN; - struct resume_mode resume = { .mode = RESUME_FALSE }; - int in_progress; - int ret = 0; - - const char * const usage[] = { - N_("git am [<options>] [(<mbox> | <Maildir>)...]"), - N_("git am [<options>] (--continue | --skip | --abort)"), - NULL - }; - - struct option options[] = { - OPT_BOOL('i', "interactive", &state.interactive, - N_("run interactively")), - OPT_HIDDEN_BOOL('b', "binary", &binary, - N_("historical option -- no-op")), - OPT_BOOL('3', "3way", &state.threeway, - N_("allow fall back on 3way merging if needed")), - OPT__QUIET(&state.quiet, N_("be quiet")), - OPT_SET_INT('s', "signoff", &state.signoff, - N_("add a Signed-off-by line to the commit message"), - SIGNOFF_EXPLICIT), - OPT_BOOL('u', "utf8", &state.utf8, - N_("recode into utf8 (default)")), - OPT_SET_INT('k', "keep", &state.keep, - N_("pass -k flag to git-mailinfo"), KEEP_TRUE), - OPT_SET_INT(0, "keep-non-patch", &state.keep, - N_("pass -b flag to git-mailinfo"), KEEP_NON_PATCH), - OPT_BOOL('m', "message-id", &state.message_id, - N_("pass -m flag to git-mailinfo")), - OPT_SET_INT_F(0, "keep-cr", &keep_cr, - N_("pass --keep-cr flag to git-mailsplit for mbox format"), - 1, PARSE_OPT_NONEG), - OPT_SET_INT_F(0, "no-keep-cr", &keep_cr, - N_("do not pass --keep-cr flag to git-mailsplit independent of am.keepcr"), - 0, PARSE_OPT_NONEG), - OPT_BOOL('c', "scissors", &state.scissors, - N_("strip everything before a scissors line")), - OPT_PASSTHRU_ARGV(0, "whitespace", &state.git_apply_opts, N_("action"), - N_("pass it through git-apply"), - 0), - OPT_PASSTHRU_ARGV(0, "ignore-space-change", &state.git_apply_opts, NULL, - N_("pass it through git-apply"), - PARSE_OPT_NOARG), - OPT_PASSTHRU_ARGV(0, "ignore-whitespace", &state.git_apply_opts, NULL, - N_("pass it through git-apply"), - PARSE_OPT_NOARG), - OPT_PASSTHRU_ARGV(0, "directory", &state.git_apply_opts, N_("root"), - N_("pass it through git-apply"), - 0), - OPT_PASSTHRU_ARGV(0, "exclude", &state.git_apply_opts, N_("path"), - N_("pass it through git-apply"), - 0), - OPT_PASSTHRU_ARGV(0, "include", &state.git_apply_opts, N_("path"), - N_("pass it through git-apply"), - 0), - OPT_PASSTHRU_ARGV('C', NULL, &state.git_apply_opts, N_("n"), - N_("pass it through git-apply"), - 0), - OPT_PASSTHRU_ARGV('p', NULL, &state.git_apply_opts, N_("num"), - N_("pass it through git-apply"), - 0), - OPT_CALLBACK(0, "patch-format", &patch_format, N_("format"), - N_("format the patch(es) are in"), - parse_opt_patchformat), - OPT_PASSTHRU_ARGV(0, "reject", &state.git_apply_opts, NULL, - N_("pass it through git-apply"), - PARSE_OPT_NOARG), - OPT_STRING(0, "resolvemsg", &state.resolvemsg, NULL, - N_("override error message when patch failure occurs")), - OPT_CMDMODE(0, "continue", &resume.mode, - N_("continue applying patches after resolving a conflict"), - RESUME_RESOLVED), - OPT_CMDMODE('r', "resolved", &resume.mode, - N_("synonyms for --continue"), - RESUME_RESOLVED), - OPT_CMDMODE(0, "skip", &resume.mode, - N_("skip the current patch"), - RESUME_SKIP), - OPT_CMDMODE(0, "abort", &resume.mode, - N_("restore the original branch and abort the patching operation."), - RESUME_ABORT), - OPT_CMDMODE(0, "quit", &resume.mode, - N_("abort the patching operation but keep HEAD where it is."), - RESUME_QUIT), - { OPTION_CALLBACK, 0, "show-current-patch", &resume.mode, - "(diff|raw)", - N_("show the patch being applied"), - PARSE_OPT_CMDMODE | PARSE_OPT_OPTARG | PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP, - parse_opt_show_current_patch, RESUME_SHOW_PATCH }, - OPT_BOOL(0, "committer-date-is-author-date", - &state.committer_date_is_author_date, - N_("lie about committer date")), - OPT_BOOL(0, "ignore-date", &state.ignore_date, - N_("use current timestamp for author date")), - OPT_RERERE_AUTOUPDATE(&state.allow_rerere_autoupdate), - { OPTION_STRING, 'S', "gpg-sign", &state.sign_commit, N_("key-id"), - N_("GPG-sign commits"), - PARSE_OPT_OPTARG, NULL, (intptr_t) "" }, - OPT_HIDDEN_BOOL(0, "rebasing", &state.rebasing, - N_("(internal use for git-rebase)")), - OPT_END() - }; - - if (argc == 2 && !strcmp(argv[1], "-h")) - usage_with_options(usage, options); - - git_config(git_am_config, NULL); - - am_state_init(&state); - - in_progress = am_in_progress(&state); - if (in_progress) - am_load(&state); - - argc = parse_options(argc, argv, prefix, options, usage, 0); - - if (binary >= 0) - fprintf_ln(stderr, _("The -b/--binary option has been a no-op for long time, and\n" - "it will be removed. Please do not use it anymore.")); - - /* Ensure a valid committer ident can be constructed */ - git_committer_info(IDENT_STRICT); - - if (repo_read_index_preload(the_repository, NULL, 0) < 0) - die(_("failed to read the index")); - - if (in_progress) { - /* - * Catch user error to feed us patches when there is a session - * in progress: - * - * 1. mbox path(s) are provided on the command-line. - * 2. stdin is not a tty: the user is trying to feed us a patch - * from standard input. This is somewhat unreliable -- stdin - * could be /dev/null for example and the caller did not - * intend to feed us a patch but wanted to continue - * unattended. - */ - if (argc || (resume.mode == RESUME_FALSE && !isatty(0))) - die(_("previous rebase directory %s still exists but mbox given."), - state.dir); - - if (resume.mode == RESUME_FALSE) - resume.mode = RESUME_APPLY; - - if (state.signoff == SIGNOFF_EXPLICIT) - am_append_signoff(&state); - } else { - struct strvec paths = STRVEC_INIT; - int i; - - /* - * Handle stray state directory in the independent-run case. In - * the --rebasing case, it is up to the caller to take care of - * stray directories. - */ - if (file_exists(state.dir) && !state.rebasing) { - if (resume.mode == RESUME_ABORT || resume.mode == RESUME_QUIT) { - am_destroy(&state); - am_state_release(&state); - return 0; - } - - die(_("Stray %s directory found.\n" - "Use \"git am --abort\" to remove it."), - state.dir); - } - - if (resume.mode) - die(_("Resolve operation not in progress, we are not resuming.")); - - for (i = 0; i < argc; i++) { - if (is_absolute_path(argv[i]) || !prefix) - strvec_push(&paths, argv[i]); - else - strvec_push(&paths, mkpath("%s/%s", prefix, argv[i])); - } - - if (state.interactive && !paths.nr) - die(_("interactive mode requires patches on the command line")); - - am_setup(&state, patch_format, paths.v, keep_cr); - - strvec_clear(&paths); - } - - switch (resume.mode) { - case RESUME_FALSE: - am_run(&state, 0); - break; - case RESUME_APPLY: - am_run(&state, 1); - break; - case RESUME_RESOLVED: - am_resolve(&state); - break; - case RESUME_SKIP: - am_skip(&state); - break; - case RESUME_ABORT: - am_abort(&state); - break; - case RESUME_QUIT: - am_rerere_clear(); - am_destroy(&state); - break; - case RESUME_SHOW_PATCH: - ret = show_patch(&state, resume.sub_mode); - break; - default: - BUG("invalid resume value"); - } - - am_state_release(&state); - - return ret; -} |