This option makes it convenient to construct commit messages for use
with 'rebase --autosquash'. The resulting commit message will be
"squash! ..." where "..." is the subject line of the specified commit
message. This option can be used with other commit message options
such as -m, -c, -C and -F.
If an editor is invoked (as with -c or -eF or no message options) the
commit message is seeded with the correctly formatted subject line.
Example usage:
$ git commit --squash HEAD~2
$ git commit --squash HEAD~2 -m "clever comment"
$ git commit --squash HEAD~2 -F msgfile
$ git commit --squash HEAD~2 -C deadbeef
Signed-off-by: Pat Notz <patnotz@xxxxxxxxx>
---
Documentation/git-commit.txt | 8 +++++++-
builtin/commit.c | 37 +++++++++++++++++++++++++++++++++++--
2 files changed, 42 insertions(+), 3 deletions(-)
diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 3367f8f..b621dc4 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -9,7 +9,7 @@ SYNOPSIS
--------
[verse]
'git commit' [-a | --interactive] [-s] [-v] [-u<mode>] [--amend] [--dry-run]
- [(-c | -C | --fixup) <commit>] [-F <file> | -m <msg>]
+ [(-c | -C | --fixup | --squash) <commit>] [-F <file> | -m <msg>]
[--reset-author] [--allow-empty] [--allow-empty-message] [--no-verify]
[-e] [--author=<author>] [--date=<date>] [--cleanup=<mode>]
[--status | --no-status] [--] [[-i | -o ]<file>...]
@@ -75,6 +75,12 @@ OPTIONS
The commit message will be the subject line from the specified
commit with a prefix of "fixup! ".
+--squash=<commit>::
+ Construct a commit message for use with `rebase --autosquash`.
+ The commit message subject line is taken from the specified
+ commit with a prefix of "squash! ". Can be used with additional
+ commit message options (`-m`/`-c`/`-C`/`-F`).
+
--reset-author::
When used with -C/-c/--amend options, declare that the
authorship of the resulting commit now belongs of the committer.
diff --git a/builtin/commit.c b/builtin/commit.c
index 0901616..d28b2ff 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -69,7 +69,7 @@ static enum {
static const char *logfile, *force_author;
static const char *template_file;
static char *edit_message, *use_message;
-static char *fixup_message;
+static char *fixup_message, *squash_message;
static char *author_name, *author_email, *author_date;
static int all, edit_flag, also, interactive, only, amend, signoff;
static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
@@ -126,6 +126,7 @@ static struct option builtin_commit_options[] = {
OPT_STRING('c', "reedit-message", &edit_message, "COMMIT", "reuse and edit message from specified commit"),
OPT_STRING('C', "reuse-message", &use_message, "COMMIT", "reuse message from specified commit"),
OPT_STRING(0, "fixup", &fixup_message, "COMMIT", "use autosquash formatted message to fixup specified commit"),
+ OPT_STRING(0, "squash", &squash_message, "COMMIT", "use autosquash formatted message to squash specified commit"),
OPT_BOOLEAN(0, "reset-author", &renew_authorship, "the commit is authored by me now (used with -C-c/--amend)"),
OPT_BOOLEAN('s', "signoff", &signoff, "add Signed-off-by:"),
OPT_FILENAME('t', "template", &template_file, "use specified template file"),
@@ -567,6 +568,27 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
if (!no_verify && run_hook(index_file, "pre-commit", NULL))
return 0;
+ if (squash_message) {
+ /*
+ * Insert the proper subject line before other commit
+ * message options add their content.
+ */
+ unsigned char sha1[20];
+ struct commit *commit;
+ struct pretty_print_context ctx = {0};
+
+ if (get_sha1(squash_message, sha1))
+ die("could not lookup commit %s", squash_message);
+ commit = lookup_commit_reference(sha1);
+ if (!commit || parse_commit(commit))
+ die("could not parse commit %s", squash_message);
+
+ if(use_message && strcmp(use_message, squash_message) == 0)
+ strbuf_addstr(&sb,"squash! ");
+ else
+ format_commit_message(commit, "squash! %s\n\n", &sb, &ctx);
+ }
+
if (message.len) {
strbuf_addbuf(&sb, &message);
hook_arg1 = "message";
@@ -620,6 +642,16 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
else if (in_merge)
hook_arg1 = "merge";
+ if (squash_message) {
+ /*
+ * If squash_commit was used for the commit subject,
+ * then we're possibly hijacking other commit log options.
+ * Reset the hook args to tell the real story.
+ */
+ hook_arg1 = "message";
+ hook_arg2 = "";
+ }
+
fp = fopen(git_path(commit_editmsg), "w");
if (fp == NULL)
die_errno("could not open '%s'", git_path(commit_editmsg));
@@ -891,7 +923,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
die("You have nothing to amend.");
if (amend && in_merge)
die("You are in the middle of a merge -- cannot amend.");
-
+ if (fixup_message && squash_message)
+ die("Options --squash and --fixup cannot be used together");
if (use_message)
f++;
if (edit_message)
--
1.7.3
--
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