On 12/19/2018 3:33 AM, issac.tro...@gmail.com wrote:
From: Issac Trotts <issac.tro...@gmail.com>
Make it possible to write for example
git log --format="%H,%S"
where the %S at the end is a new placeholder that prints out the ref
(tag/branch) for each commit.
Using %d might seem like an alternative but it only shows the ref for the last
commit in the branch.
Signed-off-by: Issac Trotts <issactro...@google.com>
---
This change is based on a question from Stack Overflow:
https://stackoverflow.com/questions/12712775/git-get-source-information-in-format
---
Documentation/pretty-formats.txt | 2 ++
builtin/log.c | 2 +-
log-tree.c | 1 +
pretty.c | 15 ++++++++++
pretty.h | 1 +
t/t4205-log-pretty-formats.sh | 50 ++++++++++++++++++++++++++++++++
6 files changed, 70 insertions(+), 1 deletion(-)
diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index 417b638cd..de6953108 100644
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -134,6 +134,8 @@ The placeholders are:
- '%cI': committer date, strict ISO 8601 format
- '%d': ref names, like the --decorate option of linkgit:git-log[1]
- '%D': ref names without the " (", ")" wrapping.
+- '%S': ref name given on the command line by which the commit was reached
+ (like `git log --source`), only works with `git log`
This "only works with `git log`" made me think about what would happen
with `git rev-list --pretty=format:"%h %S"` and the answer (on my
machine) was a segfault.
- '%e': encoding
- '%s': subject
- '%f': sanitized subject line, suitable for a filename
diff --git a/builtin/log.c b/builtin/log.c
index e8e51068b..be3025657 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -203,7 +203,7 @@ static void cmd_log_init_finish(int argc, const char
**argv, const char *prefix,
rev->diffopt.filter || rev->diffopt.flags.follow_renames)
rev->always_show_header = 0;
- if (source) {
+ if (source || (rev->pretty_given && (rev->commit_format == CMIT_FMT_USERFORMAT)
&& w.source)) {
init_revision_sources(&revision_sources);
rev->sources = &revision_sources;
}
Likely, you'll want to duplicate this initialization in the revision
machinery. Keep this one in builtin/log.c as it was before, but add
something like this initialization to setup_revisions(). Add a test for
rev-list.
[snip]
@@ -1194,6 +1195,17 @@ static size_t format_commit_one(struct strbuf *sb, /* in
UTF-8 */
load_ref_decorations(NULL, DECORATE_SHORT_REFS);
format_decorations_extended(sb, commit, c->auto_color, "", ", ",
"");
return 1;
+ case 'S': /* tag/branch like --source */
+ if (c->pretty_ctx->rev->sources == NULL) {
Use "if (!c->pretty_ctx->rev->sources".
+ return 0;
+ }
+ slot = revision_sources_at(c->pretty_ctx->rev->sources, commit);
+ if (slot && *slot) {
I'm not sure this check for 'slot' being non-null is necessary, as we
would already get a failure in the commit-slab code (for
revision_sources_at()) if the slab is not initialized.
+ strbuf_addstr(sb, *slot);
+ return 1;
+ } else {
+ die(_("failed to get info for %%S"));
Here, you die() when you fail to get a slot but above you return 0 when
the sources are not initialized.
I don't see another use of die() in this method. Is that the right way
to handle failure here? (I'm legitimately asking because I have
over-used 'die()' in the past and am still unclear on when it is
appropriate.)
'
+test_expect_success 'set up %S tests' '
+ git checkout --orphan source-a &&
+ test_commit one &&
+ test_commit two &&
+ git checkout -b source-b HEAD^ &&
+ test_commit three
+'
+
+test_expect_success 'log --format=%S paints branch names' '
+ cat >expect <<-\EOF &&
+ source-b
+ source-a
+ source-b
+ EOF
+ git log --format=%S source-a source-b >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'log --format=%S paints tag names' '
+ git tag -m tagged source-tag &&
+ cat >expect <<-\EOF &&
+ source-tag
+ source-a
+ source-tag
+ EOF
+ git log --format=%S source-tag source-a >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'log --format=%S paints symmetric ranges' '
+ cat >expect <<-\EOF &&
+ source-b
+ source-a
+ EOF
+ git log --format=%S source-a...source-b >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '%S in git log --format works with other placeholders
(part 1)' '
+ git log --format="source-b %h" source-b >expect &&
+ git log --format="%S %h" source-b >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '%S in git log --format works with other placeholders
(part 2)' '
+ git log --format="%h source-b" source-b >expect &&
+ git log --format="%h %S" source-b >actual &&
+ test_cmp expect actual
+'
+
test_done
Please also add a simple test to t6006-rev-list-format.sh.
Thanks,
-Stolee
