[PATCH] t/helper: 'test-chmtime (--get|-g)' to print only the mtime

[PATCH] t/helper: 'test-chmtime (--get|-g)' to print only the mtime

[Paul-Sebastian Ungureanu]

Compared to 'test-chmtime -v +0 file' which prints the mtime and
and the file name, 'test-chmtime --get file' displays only the mtime.
If it is used in combination with (+|=|=+|=-|-)seconds, it changes
and prints the new value.

	test-chmtime -v +0 file | sed 's/[^0-9].*$//'

is now equivalent to:

	test-chmtime --get file

Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>
---
 t/helper/test-chmtime.c              | 44 +++++++++++++++++++++++-----
 t/t2022-checkout-paths.sh            |  4 +--
 t/t3404-rebase-interactive.sh        |  2 +-
 t/t3510-cherry-pick-sequence.sh      |  4 +--
 t/t4200-rerere.sh                    |  8 ++---
 t/t5000-tar-tree.sh                  |  2 +-
 t/t6022-merge-rename.sh              | 25 +++++++---------
 t/t6501-freshen-objects.sh           |  6 ++--
 t/t7508-status.sh                    |  4 +--
 t/t7701-repack-unpack-unreachable.sh |  6 ++--
 10 files changed, 63 insertions(+), 42 deletions(-)

diff --git a/t/helper/test-chmtime.c b/t/helper/test-chmtime.c
index e76025640..611e9520a 100644
--- a/t/helper/test-chmtime.c
+++ b/t/helper/test-chmtime.c
@@ -18,19 +18,29 @@
  *
  * Examples:
  *
- * To just print the mtime use --verbose and set the file mtime offset to 0:
+ * To print the mtime and the file name use --verbose and set
+ * the file mtime offset to 0:
  *
  *	test-chmtime -v +0 file
  *
+ * To print only the mtime use --get:
+ *
+ *	test-chmtime --get file
+ *
  * To set the mtime to current time:
  *
  *	test-chmtime =+0 file
  *
+ * To set the file mtime offset to +1 and print the new value:
+ *
+ *	test-chmtime --get +1 file
+ *
  */
 #include "git-compat-util.h"
 #include <utime.h>
 
-static const char usage_str[] = "-v|--verbose (+|=|=+|=-|-)<seconds> <file>...";
+static const char usage_str[] =
+	"(-v|--verbose|-g|--get) (+|=|=+|=-|-)<seconds> <file>...";
 
 static int timespec_arg(const char *arg, long int *set_time, int *set_eq)
 {
@@ -46,7 +56,6 @@ static int timespec_arg(const char *arg, long int *set_time, int *set_eq)
 	}
 	*set_time = strtol(timespec, &test, 10);
 	if (*test) {
-		fprintf(stderr, "Not a base-10 integer: %s\n", arg + 1);
 		return 0;
 	}
 	if ((*set_eq && *set_time < 0) || *set_eq == 2) {
@@ -59,6 +68,7 @@ static int timespec_arg(const char *arg, long int *set_time, int *set_eq)
 int cmd_main(int argc, const char **argv)
 {
 	static int verbose;
+	static int get;
 
 	int i = 1;
 	/* no mtime change by default */
@@ -68,18 +78,34 @@ int cmd_main(int argc, const char **argv)
 	if (argc < 3)
 		goto usage;
 
-	if (strcmp(argv[i], "--verbose") == 0 || strcmp(argv[i], "-v") == 0) {
+	if (strcmp(argv[i], "--get") == 0 || strcmp(argv[i], "-g") == 0) {
+		get = 1;
+		++i;
+	} else if (strcmp(argv[i], "--verbose") == 0 || strcmp(argv[i], "-v") == 0) {
 		verbose = 1;
 		++i;
 	}
-	if (timespec_arg(argv[i], &set_time, &set_eq))
+
+	if (i == argc) {
+		goto usage;
+	}
+
+	if (timespec_arg(argv[i], &set_time, &set_eq)) {
 		++i;
-	else
+	} else {
+		if (get == 0) {
+			fprintf(stderr, "Not a base-10 integer: %s\n", argv[i] + 1);
+			goto usage;
+		}
+	}
+
+	if (i == argc)
 		goto usage;
 
 	for (; i < argc; i++) {
 		struct stat sb;
 		struct utimbuf utb;
+		uintmax_t mtime;
 
 		if (stat(argv[i], &sb) < 0) {
 			fprintf(stderr, "Failed to stat %s: %s\n",
@@ -99,8 +125,10 @@ int cmd_main(int argc, const char **argv)
 		utb.actime = sb.st_atime;
 		utb.modtime = set_eq ? set_time : sb.st_mtime + set_time;
 
-		if (verbose) {
-			uintmax_t mtime = utb.modtime < 0 ? 0: utb.modtime;
+		mtime = utb.modtime < 0 ? 0: utb.modtime;
+		if (get) {
+			printf("%"PRIuMAX"\n", mtime);
+		} else if (verbose) {
 			printf("%"PRIuMAX"\t%s\n", mtime, argv[i]);
 		}
 
diff --git a/t/t2022-checkout-paths.sh b/t/t2022-checkout-paths.sh
index f46d0499b..2a42083bf 100755
--- a/t/t2022-checkout-paths.sh
+++ b/t/t2022-checkout-paths.sh
@@ -73,8 +73,8 @@ test_expect_success 'do not touch files that are already up-to-date' '
 	git checkout HEAD -- file1 file2 &&
 	echo one >expect &&
 	test_cmp expect file1 &&
-	echo "1000000000	file2" >expect &&
-	test-chmtime -v +0 file2 >actual &&
+	echo "1000000000" >expect &&
+	test-chmtime --get file2 >actual &&
 	test_cmp expect actual
 '
 
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 3b905406d..0e3724d58 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -717,7 +717,7 @@ test_expect_success 'avoid unnecessary reset' '
 	set_fake_editor &&
 	git rebase -i HEAD~4 &&
 	test $HEAD = $(git rev-parse HEAD) &&
-	MTIME=$(test-chmtime -v +0 file3 | sed 's/[^0-9].*$//') &&
+	MTIME=$(test-chmtime --get file3) &&
 	test 123456789 = $MTIME
 '
 
diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh
index 0acf4b146..34f2c7b49 100755
--- a/t/t3510-cherry-pick-sequence.sh
+++ b/t/t3510-cherry-pick-sequence.sh
@@ -247,9 +247,9 @@ test_expect_success '--abort after last commit in sequence' '
 test_expect_success 'cherry-pick does not implicitly stomp an existing operation' '
 	pristine_detach initial &&
 	test_expect_code 1 git cherry-pick base..anotherpick &&
-	test-chmtime -v +0 .git/sequencer >expect &&
+	test-chmtime --get .git/sequencer >expect &&
 	test_expect_code 128 git cherry-pick unrelatedpick &&
-	test-chmtime -v +0 .git/sequencer >actual &&
+	test-chmtime --get .git/sequencer >actual &&
 	test_cmp expect actual
 '
 
diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index d97d2bebc..e49f9862c 100755
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -166,7 +166,7 @@ test_expect_success 'first postimage wins' '
 	git commit -q -a -m "prefer first over second" &&
 	test -f $rr/postimage &&
 
-	oldmtimepost=$(test-chmtime -v -60 $rr/postimage | cut -f 1) &&
+	oldmtimepost=$(test-chmtime --get -60 $rr/postimage) &&
 
 	git checkout -b third master &&
 	git show second^:a1 | sed "s/To die: t/To die! T/" >a1 &&
@@ -179,7 +179,7 @@ test_expect_success 'first postimage wins' '
 '
 
 test_expect_success 'rerere updates postimage timestamp' '
-	newmtimepost=$(test-chmtime -v +0 $rr/postimage | cut -f 1) &&
+	newmtimepost=$(test-chmtime --get $rr/postimage) &&
 	test $oldmtimepost -lt $newmtimepost
 '
 
@@ -512,7 +512,7 @@ test_expect_success 'multiple identical conflicts' '
 	count_pre_post 2 0 &&
 
 	# Pretend that the conflicts were made quite some time ago
-	find .git/rr-cache/ -type f | xargs test-chmtime -172800 &&
+	test-chmtime -172800 $(find .git/rr-cache/ -type f) &&
 
 	# Unresolved entries have not expired yet
 	git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
@@ -568,7 +568,7 @@ test_expect_success 'multiple identical conflicts' '
 	git rerere &&
 
 	# Pretend that the resolutions are old again
-	find .git/rr-cache/ -type f | xargs test-chmtime -172800 &&
+	test-chmtime -172800 $(find .git/rr-cache/ -type f) &&
 
 	# Resolved entries have not expired yet
 	git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh
index fe2d4f15a..161a700af 100755
--- a/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@ -192,7 +192,7 @@ test_expect_success \
     'validate file modification time' \
     'mkdir extract &&
      "$TAR" xf b.tar -C extract a/a &&
-     test-chmtime -v +0 extract/a/a |cut -f 1 >b.mtime &&
+     test-chmtime --get extract/a/a >b.mtime &&
      echo "1117231200" >expected.mtime &&
      test_cmp expected.mtime b.mtime'
 
diff --git a/t/t6022-merge-rename.sh b/t/t6022-merge-rename.sh
index c01f721f1..206aea0cc 100755
--- a/t/t6022-merge-rename.sh
+++ b/t/t6022-merge-rename.sh
@@ -635,10 +635,9 @@ test_expect_success 'setup avoid unnecessary update, normal rename' '
 
 test_expect_success 'avoid unnecessary update, normal rename' '
 	git checkout -q avoid-unnecessary-update-1^0 &&
-	test-chmtime =1000000000 rename &&
-	test-chmtime -v +0 rename >expect &&
+	test-chmtime --get =1000000000 rename >expect &&
 	git merge merge-branch-1 &&
-	test-chmtime -v +0 rename >actual &&
+	test-chmtime --get rename >actual &&
 	test_cmp expect actual # "rename" should have stayed intact
 '
 
@@ -668,10 +667,9 @@ test_expect_success 'setup to test avoiding unnecessary update, with D/F conflic
 
 test_expect_success 'avoid unnecessary update, with D/F conflict' '
 	git checkout -q avoid-unnecessary-update-2^0 &&
-	test-chmtime =1000000000 df &&
-	test-chmtime -v +0 df >expect &&
+	test-chmtime --get =1000000000 df >expect &&
 	git merge merge-branch-2 &&
-	test-chmtime -v +0 df >actual &&
+	test-chmtime --get df >actual &&
 	test_cmp expect actual # "df" should have stayed intact
 '
 
@@ -700,10 +698,9 @@ test_expect_success 'setup avoid unnecessary update, dir->(file,nothing)' '
 
 test_expect_success 'avoid unnecessary update, dir->(file,nothing)' '
 	git checkout -q master^0 &&
-	test-chmtime =1000000000 df &&
-	test-chmtime -v +0 df >expect &&
+	test-chmtime --get =1000000000 df >expect &&
 	git merge side &&
-	test-chmtime -v +0 df >actual &&
+	test-chmtime --get df >actual &&
 	test_cmp expect actual # "df" should have stayed intact
 '
 
@@ -730,10 +727,9 @@ test_expect_success 'setup avoid unnecessary update, modify/delete' '
 
 test_expect_success 'avoid unnecessary update, modify/delete' '
 	git checkout -q master^0 &&
-	test-chmtime =1000000000 file &&
-	test-chmtime -v +0 file >expect &&
+	test-chmtime --get =1000000000 file >expect &&
 	test_must_fail git merge side &&
-	test-chmtime -v +0 file >actual &&
+	test-chmtime --get file >actual &&
 	test_cmp expect actual # "file" should have stayed intact
 '
 
@@ -759,10 +755,9 @@ test_expect_success 'setup avoid unnecessary update, rename/add-dest' '
 
 test_expect_success 'avoid unnecessary update, rename/add-dest' '
 	git checkout -q master^0 &&
-	test-chmtime =1000000000 newfile &&
-	test-chmtime -v +0 newfile >expect &&
+	test-chmtime --get =1000000000 newfile >expect &&
 	git merge side &&
-	test-chmtime -v +0 newfile >actual &&
+	test-chmtime --get newfile >actual &&
 	test_cmp expect actual # "file" should have stayed intact
 '
 
diff --git a/t/t6501-freshen-objects.sh b/t/t6501-freshen-objects.sh
index 394b169ea..fa12bba98 100755
--- a/t/t6501-freshen-objects.sh
+++ b/t/t6501-freshen-objects.sh
@@ -72,8 +72,7 @@ for repack in '' true; do
 	'
 
 	test_expect_success "simulate time passing ($title)" '
-		find .git/objects -type f |
-		xargs test-chmtime -v -86400
+		test-chmtime --get -86400 $(find .git/objects -type f)
 	'
 
 	test_expect_success "start writing new commit with old blob ($title)" '
@@ -103,8 +102,7 @@ for repack in '' true; do
 
 	test_expect_success "abandon objects again ($title)" '
 		git reset --hard HEAD^ &&
-		find .git/objects -type f |
-		xargs test-chmtime -v -86400
+		test-chmtime --get -86400 $(find .git/objects -type f)
 	'
 
 	test_expect_success "start writing new commit with same tree ($title)" '
diff --git a/t/t7508-status.sh b/t/t7508-status.sh
index 50052e287..2e19d590e 100755
--- a/t/t7508-status.sh
+++ b/t/t7508-status.sh
@@ -1674,10 +1674,10 @@ test_expect_success '"Initial commit" should not be noted in commit template' '
 test_expect_success '--no-optional-locks prevents index update' '
 	test-chmtime =1234567890 .git/index &&
 	git --no-optional-locks status &&
-	test-chmtime -v +0 .git/index >out &&
+	test-chmtime --get .git/index >out &&
 	grep ^1234567890 out &&
 	git status &&
-	test-chmtime -v +0 .git/index >out &&
+	test-chmtime --get .git/index >out &&
 	! grep ^1234567890 out
 '
 
diff --git a/t/t7701-repack-unpack-unreachable.sh b/t/t7701-repack-unpack-unreachable.sh
index 987573c41..47f22555f 100755
--- a/t/t7701-repack-unpack-unreachable.sh
+++ b/t/t7701-repack-unpack-unreachable.sh
@@ -55,8 +55,8 @@ test_expect_success '-A with -d option leaves unreachable objects unpacked' '
 
 compare_mtimes ()
 {
-	read tref rest &&
-	while read t rest; do
+	read tref &&
+	while read t; do
 		test "$tref" = "$t" || return 1
 	done
 }
@@ -90,7 +90,7 @@ test_expect_success 'unpacked objects receive timestamp of pack file' '
 	tmppack=".git/objects/pack/tmp_pack" &&
 	ln "$packfile" "$tmppack" &&
 	git repack -A -l -d &&
-	test-chmtime -v +0 "$tmppack" "$fsha1path" "$csha1path" "$tsha1path" \
+	test-chmtime --get "$tmppack" "$fsha1path" "$csha1path" "$tsha1path" \
 		> mtimes &&
 	compare_mtimes < mtimes
 '
-- 
2.16.2.751.g6be39c975.dirty

Re: [PATCH] t/helper: 'test-chmtime (--get|-g)' to print only the mtime

[Junio C Hamano]

Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com> writes:

> Compared to 'test-chmtime -v +0 file' which prints the mtime and
> and the file name, 'test-chmtime --get file' displays only the mtime.
> If it is used in combination with (+|=|=+|=-|-)seconds, it changes
> and prints the new value.
>
> 	test-chmtime -v +0 file | sed 's/[^0-9].*$//'
>
> is now equivalent to:
>
> 	test-chmtime --get file
>
> Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>
> ---
>  t/helper/test-chmtime.c              | 44 +++++++++++++++++++++++-----
>  t/t2022-checkout-paths.sh            |  4 +--
>  t/t3404-rebase-interactive.sh        |  2 +-
>  t/t3510-cherry-pick-sequence.sh      |  4 +--
>  t/t4200-rerere.sh                    |  8 ++---
>  t/t5000-tar-tree.sh                  |  2 +-
>  t/t6022-merge-rename.sh              | 25 +++++++---------
>  t/t6501-freshen-objects.sh           |  6 ++--
>  t/t7508-status.sh                    |  4 +--
>  t/t7701-repack-unpack-unreachable.sh |  6 ++--
>  10 files changed, 63 insertions(+), 42 deletions(-)

Thanks both for suggesting and implementing an obvious improvement
and updating many places that are helped by it.

Will queue.
.

Re: [PATCH] t/helper: 'test-chmtime (--get|-g)' to print only the mtime

[Junio C Hamano]

Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com> writes:

> -	find .git/rr-cache/ -type f | xargs test-chmtime -172800 &&
> +	test-chmtime -172800 $(find .git/rr-cache/ -type f) &&

You've sneaked this kind of rewrite in, as if you are testing to see
how careful the reviewers are ;-).

We often use "find piped to xargs" pattern to avoid unbounded number
of paths from appearing on a command line, busting platform limits.
In the case of these test scripts, it does not matter very much, but
such a "we can save a process and a pipe this way" optimization is
not within the scope of "chmtime +v often is piped to sed only to
strip path---let's give it a way to just grab the timestamp" topic.
Not a very welcome change.

Having said that, I do not want this to be rerolled if this
unrelated "removal of find-piped-to-xargs pattern" is the only
niggle in the patch, as I've already checked if these conversions
are safe (they are---we are not dealing with hundreds of stuff in
.git/objects/ or .git/rr-cache/).  There were conflicts caused by
this patch and nd/combined-test-helper (which makes the test-chmtime
standalone binary as a subcommand of test-tool); I think I resolved
them correctly, but please double check when I update the public
repositories in several hours.

Thanks.