This function generates an informational patch file.
The "make_patch" and the "get_commit" functions are copied from the
GSoC sequencer project:
git://repo.or.cz/git/sbeyer.git
(commit e7b8dab0c2a73ade92017a52bb1405ea1534ef20)
Mentored-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Mentored-by: Daniel Barkalow <barkalow@xxxxxxxxxxxx>
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
---
builtin-sequencer--helper.c | 75 ++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 74 insertions(+), 1 deletions(-)
diff --git a/builtin-sequencer--helper.c b/builtin-sequencer--helper.c
index 721c0d8..8d32480 100644
--- a/builtin-sequencer--helper.c
+++ b/builtin-sequencer--helper.c
@@ -1,15 +1,83 @@
#include "builtin.h"
#include "cache.h"
#include "parse-options.h"
+#include "run-command.h"
+
+#define SEQ_DIR "rebase-merge"
+
+#define PATCH_FILE git_path(SEQ_DIR "/patch")
static const char * const git_sequencer_helper_usage[] = {
"git sequencer--helper --make-patch <commit>",
NULL
};
+/* Generate purely informational patch file */
+static void make_patch(struct commit *commit)
+{
+ struct commit_list *parents = commit->parents;
+ const char **args;
+ struct child_process chld;
+ int fd = open(PATCH_FILE, O_WRONLY | O_CREAT, 0666);
+ if (fd < 0)
+ return;
+
+ memset(&chld, 0, sizeof(chld));
+ if (!parents) {
+ write(fd, "Root commit\n", 12);
+ close(fd);
+ return;
+ } else if (!parents->next) {
+ args = xcalloc(5, sizeof(char *));
+ args[0] = "diff-tree";
+ args[1] = "-p";
+ args[2] = xstrdup(sha1_to_hex(parents->item->object.sha1));
+ args[3] = xstrdup(sha1_to_hex(((struct object *)commit)->sha1));
+ } else {
+ int i = 0;
+ int count = 1;
+
+ for (; parents; parents = parents->next)
+ ++count;
+ args = xcalloc(count + 3, sizeof(char *));
+ args[i++] = "diff";
+ args[i++] = "--cc";
+ args[i++] = xstrdup(sha1_to_hex(commit->object.sha1));
+
+ for (parents = commit->parents; parents;
+ parents = parents->next)
+ args[i++] = xstrdup(sha1_to_hex(
+ parents->item->object.sha1));
+ }
+
+ chld.argv = args;
+ chld.git_cmd = 1;
+ chld.out = fd;
+
+ /* Run, ignore errors. */
+ if (start_command(&chld))
+ return;
+ finish_command(&chld);
+
+ /* TODO: free dup'ed SHAs in argument list */
+}
+
+/* Return a commit object of "arg" */
+static struct commit *get_commit(const char *arg)
+{
+ unsigned char sha1[20];
+
+ if (get_sha1(arg, sha1)) {
+ error("Could not find '%s'", arg);
+ return NULL;
+ }
+ return lookup_commit_reference(sha1);
+}
+
int cmd_sequencer__helper(int argc, const char **argv, const char *prefix)
{
char *commit = NULL;
+ struct commit *c;
struct option options[] = {
OPT_STRING(0, "make-patch", &commit, "commit",
"create a patch from commit"),
@@ -22,6 +90,11 @@ int cmd_sequencer__helper(int argc, const char **argv, const char *prefix)
if (!commit)
usage_with_options(git_sequencer_helper_usage, options);
- /* Nothing to do yet */
+ c = get_commit(commit);
+ if (!c)
+ return 1;
+
+ make_patch(c);
+
return 0;
}
--
1.6.3.GIT
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