From d04520e3446acdcbdf1d30c812aa31d6a003c171 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 22 Jul 2011 10:12:23 -0600 Subject: [PATCH] reset: give better reflog messages The reset command creates its reflog entry from argv. However, it does so after having run parse_options, which means the only thing left in argv is any non-option arguments. Thus you would end up with confusing reflog entries like: $ git reset --hard HEAD^ $ git reset --soft HEAD@{1} $ git log -2 -g --oneline 8e46cad HEAD@{0}: HEAD@{1}: updating HEAD 1eb9486 HEAD@{1}: HEAD^: updating HEAD However, we must also consider that some scripts may set GIT_REFLOG_ACTION before calling reset, and we need to show their reflog action (with our text appended). For example: rebase -i (squash): updating HEAD On top of that, we also set the ORIG_HEAD reflog action (even though it doesn't generally exist). In that case, the reset argument is somewhat meaningless, as it has nothing to do with what's in ORIG_HEAD. This patch changes the reset reflog code to show: $GIT_REFLOG_ACTION: updating {HEAD,ORIG_HEAD} as before, but only if GIT_REFLOG_ACTION is set. Otherwise, show: reset: moving to $rev for HEAD, and: reset: updating ORIG_HEAD for ORIG_HEAD (this is still somewhat superfluous, since we are in the ORIG_HEAD reflog, obviously, but at least we now mention which command was used to update it). While we're at it, we can clean up the code a bit: - Use strbufs to make the message. - Use the "rev" parameter instead of showing all options. This makes more sense, since it is the only thing impacting the writing of the ref. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- builtin/reset.c | 49 ++++++++++++++++--------------------------------- t/t1412-reflog-loop.sh | 8 ++++---- 2 files changed, 20 insertions(+), 37 deletions(-) diff --git a/builtin/reset.c b/builtin/reset.c index 98bca044c1..27b342661d 100644 --- a/builtin/reset.c +++ b/builtin/reset.c @@ -33,25 +33,6 @@ static const char *reset_type_names[] = { N_("mixed"), N_("soft"), N_("hard"), N_("merge"), N_("keep"), NULL }; -static char *args_to_str(const char **argv) -{ - char *buf = NULL; - unsigned long len, space = 0, nr = 0; - - for (; *argv; argv++) { - len = strlen(*argv); - ALLOC_GROW(buf, nr + 1 + len, space); - if (nr) - buf[nr++] = ' '; - memcpy(buf + nr, *argv, len); - nr += len; - } - ALLOC_GROW(buf, nr + 1, space); - buf[nr] = '\0'; - - return buf; -} - static inline int is_merge(void) { return !access(git_path("MERGE_HEAD"), F_OK); @@ -215,14 +196,18 @@ static int read_from_tree(const char *prefix, const char **argv, return update_index_refresh(index_fd, lock, refresh_flags); } -static void prepend_reflog_action(const char *action, char *buf, size_t size) +static void set_reflog_message(struct strbuf *sb, const char *action, + const char *rev) { - const char *sep = ": "; const char *rla = getenv("GIT_REFLOG_ACTION"); - if (!rla) - rla = sep = ""; - if (snprintf(buf, size, "%s%s%s", rla, sep, action) >= size) - warning(_("Reflog action message too long: %.*s..."), 50, buf); + + strbuf_reset(sb); + if (rla) + strbuf_addf(sb, "%s: %s", rla, action); + else if (rev) + strbuf_addf(sb, "reset: moving to %s", rev); + else + strbuf_addf(sb, "reset: %s", action); } static void die_if_unmerged_cache(int reset_type) @@ -241,7 +226,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix) unsigned char sha1[20], *orig = NULL, sha1_orig[20], *old_orig = NULL, sha1_old_orig[20]; struct commit *commit; - char *reflog_action, msg[1024]; + struct strbuf msg = STRBUF_INIT; const struct option options[] = { OPT__QUIET(&quiet, "be quiet, only report errors"), OPT_SET_INT(0, "mixed", &reset_type, @@ -261,8 +246,6 @@ int cmd_reset(int argc, const char **argv, const char *prefix) argc = parse_options(argc, argv, prefix, options, git_reset_usage, PARSE_OPT_KEEP_DASHDASH); - reflog_action = args_to_str(argv); - setenv("GIT_REFLOG_ACTION", reflog_action, 0); /* * Possible arguments are: @@ -357,13 +340,13 @@ int cmd_reset(int argc, const char **argv, const char *prefix) old_orig = sha1_old_orig; if (!get_sha1("HEAD", sha1_orig)) { orig = sha1_orig; - prepend_reflog_action("updating ORIG_HEAD", msg, sizeof(msg)); - update_ref(msg, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR); + set_reflog_message(&msg, "updating ORIG_HEAD", NULL); + update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR); } else if (old_orig) delete_ref("ORIG_HEAD", old_orig, 0); - prepend_reflog_action("updating HEAD", msg, sizeof(msg)); - update_ref_status = update_ref(msg, "HEAD", sha1, orig, 0, MSG_ON_ERR); + set_reflog_message(&msg, "updating HEAD", rev); + update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, MSG_ON_ERR); switch (reset_type) { case HARD: @@ -380,7 +363,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix) remove_branch_state(); - free(reflog_action); + strbuf_release(&msg); return update_ref_status; } diff --git a/t/t1412-reflog-loop.sh b/t/t1412-reflog-loop.sh index 7f519e5ebe..647d888507 100755 --- a/t/t1412-reflog-loop.sh +++ b/t/t1412-reflog-loop.sh @@ -21,10 +21,10 @@ test_expect_success 'setup reflog with alternating commits' ' test_expect_success 'reflog shows all entries' ' cat >expect <<-\EOF - topic@{0} two: updating HEAD - topic@{1} one: updating HEAD - topic@{2} two: updating HEAD - topic@{3} one: updating HEAD + topic@{0} reset: moving to two + topic@{1} reset: moving to one + topic@{2} reset: moving to two + topic@{3} reset: moving to one topic@{4} branch: Created from HEAD EOF git log -g --format="%gd %gs" topic >actual && -- 2.11.4.GIT