Implement applying the patch to the index using git-apply.
If a file is unchanged but stat-dirty, git-apply may erroneously fail to
apply patches, thinking that they conflict with a dirty working tree.
As such, since 2a6f08a (am: refresh the index at start and --resolved,
2011-08-15), git-am will refresh the index before applying patches.
Re-implement this behavior.
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: Paul Tan <pyokagan@xxxxxxxxx>
---
builtin/am.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 72 insertions(+), 1 deletion(-)
diff --git a/builtin/am.c b/builtin/am.c
index 4897857..9c7a6c8 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -10,6 +10,7 @@
#include "dir.h"
#include "run-command.h"
#include "quote.h"
+#include "lockfile.h"
/**
* Returns 1 if the file is empty or does not exist, 0 otherwise.
@@ -42,6 +43,14 @@ static int strbuf_getline_crlf(struct strbuf *sb, FILE *fp)
return 0;
}
+/**
+ * Returns the length of the first line of msg.
+ */
+static int linelen(const char *msg)
+{
+ return strchrnul(msg, '\n') - msg;
+}
+
enum patch_format {
PATCH_FORMAT_UNKNOWN = 0,
PATCH_FORMAT_MBOX
@@ -561,6 +570,20 @@ static const char *msgnum(const struct am_state *state)
}
/**
+ * Refresh and write index.
+ */
+static void refresh_and_write_cache(void)
+{
+ static struct lock_file lock_file;
+
+ hold_locked_index(&lock_file, 1);
+ refresh_cache(REFRESH_QUIET);
+ if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+ die(_("unable to write index file"));
+ rollback_lock_file(&lock_file);
+}
+
+/**
* 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
@@ -650,10 +673,35 @@ finish:
}
/**
+ * Applies current patch with git-apply. Returns 0 on success, -1 otherwise.
+ */
+static int run_apply(const struct am_state *state)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+
+ cp.git_cmd = 1;
+
+ argv_array_push(&cp.args, "apply");
+ argv_array_push(&cp.args, "--index");
+ argv_array_push(&cp.args, am_path(state, "patch"));
+
+ if (run_command(&cp))
+ return -1;
+
+ /* Reload index as git-apply will have modified it. */
+ discard_cache();
+ read_cache();
+
+ return 0;
+}
+
+/**
* Applies all queued mail.
*/
static void am_run(struct am_state *state)
{
+ refresh_and_write_cache();
+
while (state->cur <= state->last) {
const char *mail = am_path(state, msgnum(state));
@@ -666,7 +714,27 @@ static void am_run(struct am_state *state)
write_author_script(state);
write_commit_msg(state);
- /* NEEDSWORK: Patch application not implemented yet */
+ printf_ln(_("Applying: %.*s"), linelen(state->msg), state->msg);
+
+ if (run_apply(state) < 0) {
+ int advice_amworkdir = 1;
+
+ printf_ln(_("Patch failed at %s %.*s"), msgnum(state),
+ linelen(state->msg), state->msg);
+
+ git_config_get_bool("advice.amworkdir", &advice_amworkdir);
+
+ if (advice_amworkdir)
+ printf_ln(_("The copy of the patch that failed is found in: %s"),
+ am_path(state, "patch"));
+
+ exit(128);
+ }
+
+ /*
+ * NEEDSWORK: After the patch has been applied to the index
+ * with git-apply, we need to make commit as well.
+ */
next:
am_next(state);
@@ -728,6 +796,9 @@ int cmd_am(int argc, const char **argv, const char *prefix)
argc = parse_options(argc, argv, prefix, options, usage, 0);
+ if (read_index_preload(&the_index, NULL) < 0)
+ die(_("failed to read the index"));
+
if (am_in_progress(&state))
am_load(&state);
else {
--
2.5.0.rc1.76.gf60a929
--
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