git-am.sh supports mbox, stgit and mercurial patches. Re-implement
support for splitting out mbox/maildirs using git-mailsplit, while also
implementing the framework required to support other patch formats in
the future.
Re-implement support for the --patch-format option (since a5a6755
(git-am foreign patch support: introduce patch_format, 2009-05-27)) to
allow the user to choose between the different patch formats.
Signed-off-by: Paul Tan
---
builtin/am.c | 104 ---
1 file changed, 100 insertions(+), 4 deletions(-)
diff --git a/builtin/am.c b/builtin/am.c
index 6c9..9c7b058 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -6,11 +6,18 @@
#include "cache.h"
#include "parse-options.h"
#include "dir.h"
+#include "run-command.h"
+
+enum patch_format {
+ PATCH_FORMAT_UNKNOWN = 0,
+ PATCH_FORMAT_MBOX
+};
struct am_state {
struct strbuf dir;/* state directory path */
int cur; /* current patch number */
int last; /* last patch number */
+ int prec; /* number of digits in patch filename */
};
/**
@@ -21,6 +28,7 @@ static void am_state_init(struct am_state *state)
memset(state, 0, sizeof(*state));
strbuf_init(&state->dir, 0);
+ state->prec = 4;
}
/**
@@ -101,13 +109,67 @@ static void am_destroy(const struct am_state *state)
}
/**
+ * Splits out individual patches from `paths`, where each path is either a mbox
+ * file or a Maildir. Return 0 on success, -1 on failure.
+ */
+static int split_patches_mbox(struct am_state *state, struct string_list
*paths)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+ struct string_list_item *item;
+ struct strbuf last = STRBUF_INIT;
+
+ cp.git_cmd = 1;
+ argv_array_push(&cp.args, "mailsplit");
+ argv_array_pushf(&cp.args, "-d%d", state->prec);
+ argv_array_pushf(&cp.args, "-o%s", state->dir.buf);
+ argv_array_push(&cp.args, "-b");
+ argv_array_push(&cp.args, "--");
+
+ for_each_string_list_item(item, paths)
+ argv_array_push(&cp.args, item->string);
+
+ if (capture_command(&cp, &last, 8))
+ return -1;
+
+ state->cur = 1;
+ state->last = strtol(last.buf, NULL, 10);
+
+ return 0;
+}
+
+/**
+ * Splits out individual patches, of patch_format, contained within paths.
+ * These 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 patch, and state->last will be set to the
+ * index of the last patch. Returns 0 on success, -1 on failure.
+ */
+static int split_patches(struct am_state *state, enum patch_format
patch_format,
+ struct string_list *paths)
+{
+ switch (patch_format) {
+ case PATCH_FORMAT_MBOX:
+ return split_patches_mbox(state, paths);
+ default:
+ die("BUG: invalid patch_format");
+ }
+ return -1;
+}
+
+/**
* Setup a new am session for applying patches
*/
-static void am_setup(struct am_state *state)
+static void am_setup(struct am_state *state, enum patch_format patch_format,
+ struct string_list *paths)
{
if (mkdir(state->dir.buf, 0777) < 0 && errno != EEXIST)
die_errno(_("failed to create directory '%s'"), state->dir.buf);
+ if (split_patches(state, patch_format, paths) < 0) {
+ am_destroy(state);
+ die(_("Failed to split patches."));
+ }
+
write_file(am_path(state, "next"), 1, "%d", state->cur);
write_file(am_path(state, "last"), 1, "%d", state->last);
@@ -128,13 +190,32 @@ static void am_next(struct am_state *state)
*/
static void am_run(struct am_state *state)
{
- while (state->cur <= state->last)
+ while (state->cur <= state->last) {
+ /* patch application not implemented yet */
+
am_next(state);
+ }
am_destroy(state);
}
+/**
+ * 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 (!strcmp(arg, "mbox"))
+ *opt_value = PATCH_FORMAT_MBOX;
+ else
+ return -1;
+ return 0;
+}
+
struct am_state state;
+int opt_patch_format;
static const char * const am_usage[] = {
N_("git am [options] [(|)...]"),
@@ -142,6 +223,8 @@ static const char * const am_usage[] = {
};
static struct option am_options[] = {
+ OPT_CALLBACK(0, "patch-format", &opt_patch_format, N_("format"),
+ N_("format the patch(es) are in"), parse_opt_patchformat),
OPT_END()
};
@@ -156,8 +239,21 @@ in
