[PATCH] [GSOC] ref-filter: add %(notes) format atom

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From: ZheNing Hu <adlternative@xxxxxxxxx>

Note that `--pretty="%N"` can view notes related
to the commit. So add `%(notes)` to ref-filter
seem is a good choice. This atom `%(notes)` view
the notes associated with the ref, and support
dereference.

Signed-off-by: ZheNing Hu <adlternative@xxxxxxxxx>
---
    [GSOC] ref-filter: add %(notes) format atom
    
    An important step in the GSOC project Use ref-filter formats in git
    cat-file is to integrate different format atoms into the ref-filter.
    Olga and Hariom have also made a lot of efforts in this area.
    
    Currently, I noticed that there may be some format atoms in "pretty.c"
    that have not been migrated to ref-filter, such as --pretty="%N",
    --pretty="%(describe)".
    
    So in this patch, I tried to migrate --pretty=%N to --format=%(notes).
    
    Hope this will be hopeful !!!

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-944%2Fadlternative%2Fformat-notes-atom-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-944/adlternative/format-notes-atom-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/944

 Documentation/git-for-each-ref.txt |  4 ++++
 ref-filter.c                       | 31 ++++++++++++++++++++++++++++--
 t/t6300-for-each-ref.sh            | 10 ++++++++++
 3 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index 2ae2478de706..07f037a16e13 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -139,6 +139,9 @@ deltabase::
 	given object, if it is stored as a delta.  Otherwise it
 	expands to the null object name (all zeroes).
 
+notes::
+	The notes associated with the ref.
+
 upstream::
 	The name of a local ref which can be considered ``upstream''
 	from the displayed ref. Respects `:short`, `:lstrip` and
@@ -302,6 +305,7 @@ git for-each-ref --count=3 --sort='-*authordate' \
 Subject: %(*subject)
 Date: %(*authordate)
 Ref: %(*refname)
+Notes: %(*notes)
 
 %(*body)
 ' 'refs/tags'
diff --git a/ref-filter.c b/ref-filter.c
index a0adb4551d87..42a5608a3056 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -23,6 +23,7 @@
 #include "worktree.h"
 #include "hashmap.h"
 #include "strvec.h"
+#include "run-command.h"
 
 static struct ref_msg {
 	const char *gone;
@@ -506,6 +507,7 @@ static struct {
 	{ "objectsize", SOURCE_OTHER, FIELD_ULONG, objectsize_atom_parser },
 	{ "objectname", SOURCE_OTHER, FIELD_STR, oid_atom_parser },
 	{ "deltabase", SOURCE_OTHER, FIELD_STR, deltabase_atom_parser },
+	{ "notes", SOURCE_OTHER, FIELD_STR },
 	{ "tree", SOURCE_OBJ, FIELD_STR, oid_atom_parser },
 	{ "parent", SOURCE_OBJ, FIELD_STR, oid_atom_parser },
 	{ "numparent", SOURCE_OBJ, FIELD_ULONG },
@@ -953,6 +955,24 @@ static int grab_oid(const char *name, const char *field, const struct object_id
 	return 0;
 }
 
+static int grab_notes(const struct object_id *oid, struct atom_value *v)
+{
+	struct child_process cmd = CHILD_PROCESS_INIT;
+	struct strbuf out = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
+	const char *args[] = { "notes", "show", NULL };
+	int ret;
+
+	cmd.git_cmd = 1;
+	strvec_pushv(&cmd.args, args);
+	strvec_push(&cmd.args, oid_to_hex(oid));
+	ret = pipe_command(&cmd, NULL, 0, &out, 0, &err, 0);
+	strbuf_trim_trailing_newline(&out);
+	v->s = strbuf_detach(&out, NULL);
+	strbuf_release(&err);
+	return ret;
+}
+
 /* See grab_values */
 static void grab_common_values(struct atom_value *val, int deref, struct expand_data *oi)
 {
@@ -975,8 +995,12 @@ static void grab_common_values(struct atom_value *val, int deref, struct expand_
 			v->s = xstrfmt("%"PRIuMAX , (uintmax_t)oi->size);
 		} else if (!strcmp(name, "deltabase"))
 			v->s = xstrdup(oid_to_hex(&oi->delta_base_oid));
-		else if (deref)
-			grab_oid(name, "objectname", &oi->oid, v, &used_atom[i]);
+		else if (deref) {
+			if (!strcmp(name, "notes"))
+				grab_notes(&oi->oid, v);
+			else
+				grab_oid(name, "objectname", &oi->oid, v, &used_atom[i]);
+		}
 	}
 }
 
@@ -1767,6 +1791,9 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
 			continue;
 		} else if (!deref && grab_oid(name, "objectname", &ref->objectname, v, atom)) {
 			continue;
+		} else if (!deref && !strcmp(name, "notes")) {
+			grab_notes(&ref->objectname, v);
+			continue;
 		} else if (!strcmp(name, "HEAD")) {
 			if (atom->u.head && !strcmp(ref->refname, atom->u.head))
 				v->s = xstrdup("*");
diff --git a/t/t6300-for-each-ref.sh b/t/t6300-for-each-ref.sh
index 9e0214076b4d..61cdbeb696ff 100755
--- a/t/t6300-for-each-ref.sh
+++ b/t/t6300-for-each-ref.sh
@@ -32,8 +32,10 @@ test_expect_success setup '
 	git add one &&
 	git commit -m "Initial" &&
 	git branch -M main &&
+	git notes add -m "commit-notes" HEAD &&
 	setdate_and_increment &&
 	git tag -a -m "Tagging at $datestamp" testtag &&
+	git notes add -m "tag-notes" testtag &&
 	git update-ref refs/remotes/origin/main main &&
 	git remote add origin nowhere &&
 	git config branch.main.remote origin &&
@@ -162,6 +164,7 @@ test_atom head contents:signature ''
 test_atom head contents 'Initial
 '
 test_atom head HEAD '*'
+test_atom head notes $(git notes show refs/heads/main)
 
 test_atom tag refname refs/tags/testtag
 test_atom tag refname:short testtag
@@ -220,6 +223,8 @@ test_atom tag contents:signature ''
 test_atom tag contents 'Tagging at 1151968727
 '
 test_atom tag HEAD ' '
+test_atom tag notes $(git notes show refs/tags/testtag)
+test_atom tag "*notes" $(git notes show refs/heads/main)
 
 test_expect_success 'Check invalid atoms names are errors' '
 	test_must_fail git for-each-ref --format="%(INVALID)" refs/heads
@@ -380,6 +385,7 @@ test_expect_success 'exercise strftime with odd fields' '
 
 cat >expected <<\EOF
 refs/heads/main
+refs/notes/commits
 refs/remotes/origin/main
 refs/tags/testtag
 EOF
@@ -393,6 +399,7 @@ test_expect_success 'Verify ascending sort' '
 cat >expected <<\EOF
 refs/tags/testtag
 refs/remotes/origin/main
+refs/notes/commits
 refs/heads/main
 EOF
 
@@ -429,6 +436,7 @@ test_expect_success 'exercise glob patterns with prefixes' '
 
 cat >expected <<\EOF
 'refs/heads/main'
+'refs/notes/commits'
 'refs/remotes/origin/main'
 'refs/tags/testtag'
 EOF
@@ -450,6 +458,7 @@ test_expect_success 'Quoting style: python' '
 
 cat >expected <<\EOF
 "refs/heads/main"
+"refs/notes/commits"
 "refs/remotes/origin/main"
 "refs/tags/testtag"
 EOF
@@ -509,6 +518,7 @@ test_expect_success 'Check for invalid refname format' '
 test_expect_success 'set up color tests' '
 	cat >expected.color <<-EOF &&
 	$(git rev-parse --short refs/heads/main) <GREEN>main<RESET>
+	$(git rev-parse --short refs/notes/commits) <GREEN>notes/commits<RESET>
 	$(git rev-parse --short refs/remotes/myfork/main) <GREEN>myfork/main<RESET>
 	$(git rev-parse --short refs/remotes/origin/main) <GREEN>origin/main<RESET>
 	$(git rev-parse --short refs/tags/testtag) <GREEN>testtag<RESET>

base-commit: 311531c9de557d25ac087c1637818bd2aad6eb3a
-- 
gitgitgadget



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