diff options
Diffstat (limited to 'third_party/git/apply.h')
| -rw-r--r-- | third_party/git/apply.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/third_party/git/apply.h b/third_party/git/apply.h new file mode 100644 index 000000000000..da3d95fa5098 --- /dev/null +++ b/third_party/git/apply.h @@ -0,0 +1,190 @@ +#ifndef APPLY_H +#define APPLY_H + +#include "hash.h" +#include "lockfile.h" +#include "string-list.h" + +struct repository; + +enum apply_ws_error_action { + nowarn_ws_error, + warn_on_ws_error, + die_on_ws_error, + correct_ws_error +}; + +enum apply_ws_ignore { + ignore_ws_none, + ignore_ws_change +}; + +enum apply_verbosity { + verbosity_silent = -1, + verbosity_normal = 0, + verbosity_verbose = 1 +}; + +/* + * We need to keep track of how symlinks in the preimage are + * manipulated by the patches. A patch to add a/b/c where a/b + * is a symlink should not be allowed to affect the directory + * the symlink points at, but if the same patch removes a/b, + * it is perfectly fine, as the patch removes a/b to make room + * to create a directory a/b so that a/b/c can be created. + * + * See also "struct string_list symlink_changes" in "struct + * apply_state". + */ +#define APPLY_SYMLINK_GOES_AWAY 01 +#define APPLY_SYMLINK_IN_RESULT 02 + +struct apply_state { + const char *prefix; + + /* Lock file */ + struct lock_file lock_file; + + /* These control what gets looked at and modified */ + int apply; /* this is not a dry-run */ + int cached; /* apply to the index only */ + int check; /* preimage must match working tree, don't actually apply */ + int check_index; /* preimage must match the indexed version */ + int update_index; /* check_index && apply */ + int ita_only; /* add intent-to-add entries to the index */ + + /* These control cosmetic aspect of the output */ + int diffstat; /* just show a diffstat, and don't actually apply */ + int numstat; /* just show a numeric diffstat, and don't actually apply */ + int summary; /* just report creation, deletion, etc, and don't actually apply */ + + /* These boolean parameters control how the apply is done */ + int allow_overlap; + int apply_in_reverse; + int apply_with_reject; + int no_add; + int threeway; + int unidiff_zero; + int unsafe_paths; + + /* Other non boolean parameters */ + struct repository *repo; + const char *index_file; + enum apply_verbosity apply_verbosity; + const char *fake_ancestor; + const char *patch_input_file; + int line_termination; + struct strbuf root; + int p_value; + int p_value_known; + unsigned int p_context; + + /* Exclude and include path parameters */ + struct string_list limit_by_name; + int has_include; + + /* Various "current state" */ + int linenr; /* current line number */ + struct string_list symlink_changes; /* we have to track symlinks */ + + /* + * For "diff-stat" like behaviour, we keep track of the biggest change + * we've seen, and the longest filename. That allows us to do simple + * scaling. + */ + int max_change; + int max_len; + + /* + * Records filenames that have been touched, in order to handle + * the case where more than one patches touch the same file. + */ + struct string_list fn_table; + + /* + * This is to save reporting routines before using + * set_error_routine() or set_warn_routine() to install muting + * routines when in verbosity_silent mode. + */ + void (*saved_error_routine)(const char *err, va_list params); + void (*saved_warn_routine)(const char *warn, va_list params); + + /* These control whitespace errors */ + enum apply_ws_error_action ws_error_action; + enum apply_ws_ignore ws_ignore_action; + const char *whitespace_option; + int whitespace_error; + int squelch_whitespace_errors; + int applied_after_fixing_ws; +}; + +/* + * This represents a "patch" to a file, both metainfo changes + * such as creation/deletion, filemode and content changes represented + * as a series of fragments. + */ +struct patch { + char *new_name, *old_name, *def_name; + unsigned int old_mode, new_mode; + int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */ + int rejected; + unsigned ws_rule; + int lines_added, lines_deleted; + int score; + int extension_linenr; /* first line specifying delete/new/rename/copy */ + unsigned int is_toplevel_relative:1; + unsigned int inaccurate_eof:1; + unsigned int is_binary:1; + unsigned int is_copy:1; + unsigned int is_rename:1; + unsigned int recount:1; + unsigned int conflicted_threeway:1; + unsigned int direct_to_threeway:1; + unsigned int crlf_in_old:1; + struct fragment *fragments; + char *result; + size_t resultsize; + char old_oid_prefix[GIT_MAX_HEXSZ + 1]; + char new_oid_prefix[GIT_MAX_HEXSZ + 1]; + struct patch *next; + + /* three-way fallback result */ + struct object_id threeway_stage[3]; +}; + +int apply_parse_options(int argc, const char **argv, + struct apply_state *state, + int *force_apply, int *options, + const char * const *apply_usage); +int init_apply_state(struct apply_state *state, + struct repository *repo, + const char *prefix); +void clear_apply_state(struct apply_state *state); +int check_apply_state(struct apply_state *state, int force_apply); + +/* + * Parse a git diff header, starting at line. Fills the relevant + * metadata information in 'struct patch'. + * + * Returns -1 on failure, the length of the parsed header otherwise. + */ +int parse_git_diff_header(struct strbuf *root, + int *linenr, + int p_value, + const char *line, + int len, + unsigned int size, + struct patch *patch); + +/* + * Some aspects of the apply behavior are controlled by the following + * bits in the "options" parameter passed to apply_all_patches(). + */ +#define APPLY_OPT_INACCURATE_EOF (1<<0) /* accept inaccurate eof */ +#define APPLY_OPT_RECOUNT (1<<1) /* accept inaccurate line count */ + +int apply_all_patches(struct apply_state *state, + int argc, const char **argv, + int options); + +#endif |