chore(3p/git): Unvendor git and track patches instead r/2903

This was vendored a long time ago under the expectation that keeping
it in sync with cgit would be easier this way, but it has proven not
to be a big issue.

On the other hand, a vendored copy of git is an annoying maintenance
burden. It is much easier to rebase the single (dottime) patch that we
have.

This removes the vendored copy of git and instead passes the git
source code to cgit via `pkgs.srcOnly`, which includes the applied
patch so that cgit can continue rendering dottime.

Change-Id: If31f62dea7ce688fd1b9050204e9378019775f2b

1 files changed, 0 insertions, 321 deletions

diff --git a/third_party/git/tempfile.c b/third_party/git/tempfile.c
deleted file mode 100644
index 94aa18f3f7db..000000000000
--- a/third_party/git/tempfile.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * State diagram and cleanup
- * -------------------------
- *
- * If the program exits while a temporary file is active, we want to
- * make sure that we remove it. This is done by remembering the active
- * temporary files in a linked list, `tempfile_list`. An `atexit(3)`
- * handler and a signal handler are registered, to clean up any active
- * temporary files.
- *
- * Because the signal handler can run at any time, `tempfile_list` and
- * the `tempfile` objects that comprise it must be kept in
- * self-consistent states at all times.
- *
- * The possible states of a `tempfile` object are as follows:
- *
- * - Uninitialized. In this state the object's `on_list` field must be
- *   zero but the rest of its contents need not be initialized. As
- *   soon as the object is used in any way, it is irrevocably
- *   registered in `tempfile_list`, and `on_list` is set.
- *
- * - Active, file open (after `create_tempfile()` or
- *   `reopen_tempfile()`). In this state:
- *
- *   - the temporary file exists
- *   - `active` is set
- *   - `filename` holds the filename of the temporary file
- *   - `fd` holds a file descriptor open for writing to it
- *   - `fp` holds a pointer to an open `FILE` object if and only if
- *     `fdopen_tempfile()` has been called on the object
- *   - `owner` holds the PID of the process that created the file
- *
- * - Active, file closed (after `close_tempfile_gently()`). Same
- *   as the previous state, except that the temporary file is closed,
- *   `fd` is -1, and `fp` is `NULL`.
- *
- * - Inactive (after `delete_tempfile()`, `rename_tempfile()`, or a
- *   failed attempt to create a temporary file). In this state:
- *
- *   - `active` is unset
- *   - `filename` is empty (usually, though there are transitory
- *     states in which this condition doesn't hold). Client code should
- *     *not* rely on the filename being empty in this state.
- *   - `fd` is -1 and `fp` is `NULL`
- *   - the object is removed from `tempfile_list` (but could be used again)
- *
- * A temporary file is owned by the process that created it. The
- * `tempfile` has an `owner` field that records the owner's PID. This
- * field is used to prevent a forked process from deleting a temporary
- * file created by its parent.
- */
-
-#include "cache.h"
-#include "tempfile.h"
-#include "sigchain.h"
-
-static VOLATILE_LIST_HEAD(tempfile_list);
-
-static void remove_tempfiles(int in_signal_handler)
-{
-	pid_t me = getpid();
-	volatile struct volatile_list_head *pos;
-
-	list_for_each(pos, &tempfile_list) {
-		struct tempfile *p = list_entry(pos, struct tempfile, list);
-
-		if (!is_tempfile_active(p) || p->owner != me)
-			continue;
-
-		if (p->fd >= 0)
-			close(p->fd);
-
-		if (in_signal_handler)
-			unlink(p->filename.buf);
-		else
-			unlink_or_warn(p->filename.buf);
-
-		p->active = 0;
-	}
-}
-
-static void remove_tempfiles_on_exit(void)
-{
-	remove_tempfiles(0);
-}
-
-static void remove_tempfiles_on_signal(int signo)
-{
-	remove_tempfiles(1);
-	sigchain_pop(signo);
-	raise(signo);
-}
-
-static struct tempfile *new_tempfile(void)
-{
-	struct tempfile *tempfile = xmalloc(sizeof(*tempfile));
-	tempfile->fd = -1;
-	tempfile->fp = NULL;
-	tempfile->active = 0;
-	tempfile->owner = 0;
-	INIT_LIST_HEAD(&tempfile->list);
-	strbuf_init(&tempfile->filename, 0);
-	return tempfile;
-}
-
-static void activate_tempfile(struct tempfile *tempfile)
-{
-	static int initialized;
-
-	if (is_tempfile_active(tempfile))
-		BUG("activate_tempfile called for active object");
-
-	if (!initialized) {
-		sigchain_push_common(remove_tempfiles_on_signal);
-		atexit(remove_tempfiles_on_exit);
-		initialized = 1;
-	}
-
-	volatile_list_add(&tempfile->list, &tempfile_list);
-	tempfile->owner = getpid();
-	tempfile->active = 1;
-}
-
-static void deactivate_tempfile(struct tempfile *tempfile)
-{
-	tempfile->active = 0;
-	strbuf_release(&tempfile->filename);
-	volatile_list_del(&tempfile->list);
-	free(tempfile);
-}
-
-/* Make sure errno contains a meaningful value on error */
-struct tempfile *create_tempfile_mode(const char *path, int mode)
-{
-	struct tempfile *tempfile = new_tempfile();
-
-	strbuf_add_absolute_path(&tempfile->filename, path);
-	tempfile->fd = open(tempfile->filename.buf,
-			    O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, mode);
-	if (O_CLOEXEC && tempfile->fd < 0 && errno == EINVAL)
-		/* Try again w/o O_CLOEXEC: the kernel might not support it */
-		tempfile->fd = open(tempfile->filename.buf,
-				    O_RDWR | O_CREAT | O_EXCL, mode);
-	if (tempfile->fd < 0) {
-		deactivate_tempfile(tempfile);
-		return NULL;
-	}
-	activate_tempfile(tempfile);
-	if (adjust_shared_perm(tempfile->filename.buf)) {
-		int save_errno = errno;
-		error("cannot fix permission bits on %s", tempfile->filename.buf);
-		delete_tempfile(&tempfile);
-		errno = save_errno;
-		return NULL;
-	}
-
-	return tempfile;
-}
-
-struct tempfile *register_tempfile(const char *path)
-{
-	struct tempfile *tempfile = new_tempfile();
-	strbuf_add_absolute_path(&tempfile->filename, path);
-	activate_tempfile(tempfile);
-	return tempfile;
-}
-
-struct tempfile *mks_tempfile_sm(const char *filename_template, int suffixlen, int mode)
-{
-	struct tempfile *tempfile = new_tempfile();
-
-	strbuf_add_absolute_path(&tempfile->filename, filename_template);
-	tempfile->fd = git_mkstemps_mode(tempfile->filename.buf, suffixlen, mode);
-	if (tempfile->fd < 0) {
-		deactivate_tempfile(tempfile);
-		return NULL;
-	}
-	activate_tempfile(tempfile);
-	return tempfile;
-}
-
-struct tempfile *mks_tempfile_tsm(const char *filename_template, int suffixlen, int mode)
-{
-	struct tempfile *tempfile = new_tempfile();
-	const char *tmpdir;
-
-	tmpdir = getenv("TMPDIR");
-	if (!tmpdir)
-		tmpdir = "/tmp";
-
-	strbuf_addf(&tempfile->filename, "%s/%s", tmpdir, filename_template);
-	tempfile->fd = git_mkstemps_mode(tempfile->filename.buf, suffixlen, mode);
-	if (tempfile->fd < 0) {
-		deactivate_tempfile(tempfile);
-		return NULL;
-	}
-	activate_tempfile(tempfile);
-	return tempfile;
-}
-
-struct tempfile *xmks_tempfile_m(const char *filename_template, int mode)
-{
-	struct tempfile *tempfile;
-	struct strbuf full_template = STRBUF_INIT;
-
-	strbuf_add_absolute_path(&full_template, filename_template);
-	tempfile = mks_tempfile_m(full_template.buf, mode);
-	if (!tempfile)
-		die_errno("Unable to create temporary file '%s'",
-			  full_template.buf);
-
-	strbuf_release(&full_template);
-	return tempfile;
-}
-
-FILE *fdopen_tempfile(struct tempfile *tempfile, const char *mode)
-{
-	if (!is_tempfile_active(tempfile))
-		BUG("fdopen_tempfile() called for inactive object");
-	if (tempfile->fp)
-		BUG("fdopen_tempfile() called for open object");
-
-	tempfile->fp = fdopen(tempfile->fd, mode);
-	return tempfile->fp;
-}
-
-const char *get_tempfile_path(struct tempfile *tempfile)
-{
-	if (!is_tempfile_active(tempfile))
-		BUG("get_tempfile_path() called for inactive object");
-	return tempfile->filename.buf;
-}
-
-int get_tempfile_fd(struct tempfile *tempfile)
-{
-	if (!is_tempfile_active(tempfile))
-		BUG("get_tempfile_fd() called for inactive object");
-	return tempfile->fd;
-}
-
-FILE *get_tempfile_fp(struct tempfile *tempfile)
-{
-	if (!is_tempfile_active(tempfile))
-		BUG("get_tempfile_fp() called for inactive object");
-	return tempfile->fp;
-}
-
-int close_tempfile_gently(struct tempfile *tempfile)
-{
-	int fd;
-	FILE *fp;
-	int err;
-
-	if (!is_tempfile_active(tempfile) || tempfile->fd < 0)
-		return 0;
-
-	fd = tempfile->fd;
-	fp = tempfile->fp;
-	tempfile->fd = -1;
-	if (fp) {
-		tempfile->fp = NULL;
-		if (ferror(fp)) {
-			err = -1;
-			if (!fclose(fp))
-				errno = EIO;
-		} else {
-			err = fclose(fp);
-		}
-	} else {
-		err = close(fd);
-	}
-
-	return err ? -1 : 0;
-}
-
-int reopen_tempfile(struct tempfile *tempfile)
-{
-	if (!is_tempfile_active(tempfile))
-		BUG("reopen_tempfile called for an inactive object");
-	if (0 <= tempfile->fd)
-		BUG("reopen_tempfile called for an open object");
-	tempfile->fd = open(tempfile->filename.buf, O_WRONLY|O_TRUNC);
-	return tempfile->fd;
-}
-
-int rename_tempfile(struct tempfile **tempfile_p, const char *path)
-{
-	struct tempfile *tempfile = *tempfile_p;
-
-	if (!is_tempfile_active(tempfile))
-		BUG("rename_tempfile called for inactive object");
-
-	if (close_tempfile_gently(tempfile)) {
-		delete_tempfile(tempfile_p);
-		return -1;
-	}
-
-	if (rename(tempfile->filename.buf, path)) {
-		int save_errno = errno;
-		delete_tempfile(tempfile_p);
-		errno = save_errno;
-		return -1;
-	}
-
-	deactivate_tempfile(tempfile);
-	*tempfile_p = NULL;
-	return 0;
-}
-
-void delete_tempfile(struct tempfile **tempfile_p)
-{
-	struct tempfile *tempfile = *tempfile_p;
-
-	if (!is_tempfile_active(tempfile))
-		return;
-
-	close_tempfile_gently(tempfile);
-	unlink_or_warn(tempfile->filename.buf);
-	deactivate_tempfile(tempfile);
-	*tempfile_p = NULL;
-}