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[PATCH v4 09/10] tag.c: implement '--format' option

From
Karthik Nayak <karthik.188@gmail.com>
Date
Jul 24, 2015, 19:19 UTC
Message-ID
<1437765582-12537-2-git-send-email-Karthik.188@gmail.com>
In-Reply-To
<1437765582-12537-1-git-send-email-Karthik.188@gmail.com>
From: Karthik Nayak <karthik.188@gmail.com>

Implement the '--format' option provided by 'ref-filter'. This lets the user list tags as per desired format similar to the implementation in 'git for-each-ref'.

Add tests and documentation for the same.
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 Documentation/git-tag.txt | 15 ++++++++++++++-
 builtin/tag.c             | 11 +++++++----
 t/t7004-tag.sh            | 16 ++++++++++++++++
 3 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index 02fb363..727d653 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -13,7 +13,8 @@ SYNOPSIS
 	<tagname> [<commit> | <object>]
 'git tag' -d <tagname>...
 'git tag' [-n[<num>]] -l [--contains <commit>] [--points-at <object>]
-	[--column[=<options>] | --no-column] [--sort=<key>] [<pattern>...]
+	[--column[=<options>] | --no-column] [--sort=<key>] [--format=<format>]
+	[<pattern>...]
 'git tag' -v <tagname>...
 
 DESCRIPTION
@@ -155,6 +156,18 @@ This option is only applicable when listing tags without annotation lines.
 	The object that the new tag will refer to, usually a commit.
 	Defaults to HEAD.
 
+<format>::
+	A string that interpolates `%(fieldname)` from the object
+	pointed at by a ref being shown.  If `fieldname` is prefixed
+	with an asterisk (`*`) and the ref points at a tag object, the
+	value for the field in the object tag refers is used.  When
+	unspecified, defaults to `%(refname:short)`.  It also
+	interpolates `%%` to `%`, and `%xx` where `xx` are hex digits
+	interpolates to character with hex code `xx`; for example
+	`%00` interpolates to `\0` (NUL), `%09` to `\t` (TAB) and
+	`%0a` to `\n` (LF).  The fields are same as those in `git
+	for-each-ref`.
+
 
 CONFIGURATION
 -------------
diff --git a/builtin/tag.c b/builtin/tag.c
index d396872..a8052b4 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -30,10 +30,9 @@ static const char * const git_tag_usage[] = {
 
 static unsigned int colopts;
 
-static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting)
+static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting, const char *format)
 {
 	struct ref_array array;
-	char *format;
 	int i;
 
 	memset(&array, 0, sizeof(array));
@@ -43,7 +42,7 @@ static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting)
 
 	if (filter->lines)
 		format = "%(align:16)%(refname:short)";
-	else
+	else if (!format)
 		format = "%(refname:short)";
 
 	verify_ref_format(format);
@@ -326,6 +325,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 	struct strbuf err = STRBUF_INIT;
 	struct ref_filter filter;
 	static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
+	const char *format = NULL;
 	struct option options[] = {
 		OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 		{ OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
@@ -357,6 +357,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 			OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 			N_("print only tags of the object"), 0, parse_opt_object_name
 		},
+		OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
 		OPT_END()
 	};
 
@@ -396,8 +397,10 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 			copts.padding = 2;
 			run_column_filter(colopts, &copts);
 		}
+		if (format && (filter.lines != -1))
+			die(_("--format and -n are incompatible"));
 		filter.name_patterns = argv;
-		ret = list_tags(&filter, sorting);
+		ret = list_tags(&filter, sorting, format);
 		if (column_active(colopts))
 			stop_column_filter();
 		return ret;
diff --git a/t/t7004-tag.sh b/t/t7004-tag.sh
index 51a233f..884c0d3 100755
--- a/t/t7004-tag.sh
+++ b/t/t7004-tag.sh
@@ -1507,4 +1507,20 @@ EOF"
 	test_cmp expect actual
 '
 
+test_expect_success '--format cannot be used with -n' '
+	test_must_fail git tag -l -n4 --format="%(refname)"
+'
+
+test_expect_success '--format should list tags as per format given' '
+	cat >expect <<-\EOF &&
+	refname : refs/tags/foo1.10
+	refname : refs/tags/foo1.3
+	refname : refs/tags/foo1.6
+	refname : refs/tags/foo1.6-rc1
+	refname : refs/tags/foo1.6-rc2
+	EOF
+	git tag -l --format="refname : %(refname)" "foo*" >actual &&
+	test_cmp expect actual
+'
+
 test_done

-- 
2.4.6
Previous: Karthik NayakNext: Karthik Nayak
Message 35 of 36 in “port tag.c to use ref-filter APIs”
  1. 0/10 port tag.c to use ref-filter APIsKarthik Nayak, Jul 24, 2015
  2. 01/10 ref-filter: add option to align atoms to the leftKarthik Nayak, Jul 24, 2015
  3. Junio C HamanoJul 24, 2015
  4. Junio C HamanoJul 24, 2015
  5. Karthik NayakJul 25, 2015
  6. Eric SunshineJul 26, 2015
  7. Karthik NayakJul 26, 2015
  8. Eric SunshineJul 26, 2015
  9. Karthik NayakJul 26, 2015
  10. Matthieu MoyJul 27, 2015
  11. Duy NguyenJul 27, 2015
  12. Jacob KellerJul 27, 2015
  13. Duy NguyenJul 27, 2015
  14. Duy NguyenJul 28, 2015
  15. 02/10 ref-filter: make the 'color' use ref_formatting_stateKarthik Nayak, Jul 24, 2015
  16. Junio C HamanoJul 24, 2015
  17. Karthik NayakJul 25, 2015
  18. Eric SunshineJul 26, 2015
  19. Eric SunshineJul 26, 2015
  20. Karthik NayakJul 26, 2015
  21. 03/10 ref-filter: add option to filter only tagsKarthik Nayak, Jul 24, 2015
  22. 04/10 ref-filter: support printing N lines from tag annotationKarthik Nayak, Jul 24, 2015
  23. Eric SunshineJul 26, 2015
  24. Karthik NayakJul 26, 2015
  25. 05/10 ref-filter: add support to sort by versionKarthik Nayak, Jul 24, 2015
  26. Junio C HamanoJul 25, 2015
  27. Karthik NayakJul 26, 2015
  28. Junio C HamanoJul 27, 2015
  29. Karthik NayakJul 27, 2015
  30. 06/10 ref-filter: add option to match literal patternKarthik Nayak, Jul 24, 2015
  31. Eric SunshineJul 26, 2015
  32. Karthik NayakJul 26, 2015
  33. 07/10 tag.c: use 'ref-filter' data structuresKarthik Nayak, Jul 24, 2015
  34. 08/10 tag.c: use 'ref-filter' APIsKarthik Nayak, Jul 24, 2015
  35. 09/10 tag.c: implement '--format' optionKarthik Nayak, Jul 24, 2015
  36. 10/10 tag.c: implement '--merged' and '--no-merged' optionsKarthik Nayak, Jul 24, 2015

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