From: "Marc Strapetz via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Marc Strapetz <marc.strapetz@syntevo.com>,
Marc Strapetz <marc.strapetz@syntevo.com>
Subject: [PATCH v4 1/4] test-lib: introduce API for verifying file mtime
Date: Fri, 07 Jan 2022 11:17:28 +0000 [thread overview]
Message-ID: <37c11bfafc4c5675124db81cdd61fcb3e8c91ab2.1641554252.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1105.v4.git.1641554252.gitgitgadget@gmail.com>
From: Marc Strapetz <marc.strapetz@syntevo.com>
Add functions `test_set_magic_mtime` and `test_is_magic_mtime` which can
be used to (re)set the mtime of a file to a predefined ("magic")
timestamp, then perform some operations and finally check for mtime
changes of the file.
The core implementation follows the suggestion from the
mailing list [1].
[1] https://lore.kernel.org/git/xmqqczl5hpaq.fsf@gitster.g/T/#u
Signed-off-by: Marc Strapetz <marc.strapetz@syntevo.com>
---
t/test-lib-functions.sh | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 389153e5916..c1afa0884bf 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -1806,3 +1806,36 @@ test_region () {
test_readlink () {
perl -le 'print readlink($_) for @ARGV' "$@"
}
+
+# Set mtime to a fixed "magic" timestamp in mid February 2009, before we
+# run an operation that may or may not touch the file. If the file was
+# touched, its timestamp will not accidentally have such an old timestamp,
+# as long as your filesystem clock is reasonably correct. To verify the
+# timestamp, follow up with test_is_magic_mtime.
+#
+# An optional increment to the magic timestamp may be specified as second
+# argument.
+test_set_magic_mtime () {
+ local inc=${2:-0} &&
+ local mtime=$((1234567890 + $inc)) &&
+ test-tool chmtime =$mtime "$1" &&
+ test_is_magic_mtime "$1" $inc
+}
+
+# Test whether the given file has the "magic" mtime set. This is meant to
+# be used in combination with test_set_magic_mtime.
+#
+# An optional increment to the magic timestamp may be specified as second
+# argument. Usually, this should be the same increment which was used for
+# the associated test_set_magic_mtime.
+test_is_magic_mtime () {
+ local inc=${2:-0} &&
+ local mtime=$((1234567890 + $inc)) &&
+ echo $mtime >.git/test-mtime-expect &&
+ test-tool chmtime --get "$1" >.git/test-mtime-actual &&
+ test_cmp .git/test-mtime-expect .git/test-mtime-actual
+ local ret=$?
+ rm -f .git/test-mtime-expect
+ rm -f .git/test-mtime-actual
+ return $ret
+}
--
gitgitgadget
next prev parent reply other threads:[~2022-01-07 11:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-22 13:56 [PATCH] update-index: refresh should rewrite index in case of racy timestamps Marc Strapetz via GitGitGadget
2021-12-22 23:52 ` Junio C Hamano
2021-12-23 18:24 ` Marc Strapetz
2022-01-05 13:15 ` [PATCH v2 0/2] " Marc Strapetz via GitGitGadget
2022-01-05 13:15 ` [PATCH v2 1/2] t7508: add tests capturing racy timestamp handling Marc Strapetz via GitGitGadget
2022-01-05 20:59 ` Junio C Hamano
2022-01-06 10:21 ` Marc Strapetz
2022-01-05 13:15 ` [PATCH v2 2/2] update-index: refresh should rewrite index in case of racy timestamps Marc Strapetz via GitGitGadget
2022-01-05 21:03 ` Junio C Hamano
2022-01-06 22:34 ` [PATCH v3 0/4] " Marc Strapetz via GitGitGadget
2022-01-06 22:34 ` [PATCH v3 1/4] test-lib: introduce API for verifying file mtime Marc Strapetz via GitGitGadget
2022-01-06 23:55 ` Junio C Hamano
2022-01-06 22:34 ` [PATCH v3 2/4] t7508: fix bogus mtime verification Marc Strapetz via GitGitGadget
2022-01-06 22:34 ` [PATCH v3 3/4] t7508: add tests capturing racy timestamp handling Marc Strapetz via GitGitGadget
2022-01-06 22:34 ` [PATCH v3 4/4] update-index: refresh should rewrite index in case of racy timestamps Marc Strapetz via GitGitGadget
2022-01-07 11:17 ` [PATCH v4 0/4] " Marc Strapetz via GitGitGadget
2022-01-07 11:17 ` Marc Strapetz via GitGitGadget [this message]
2022-01-07 11:17 ` [PATCH v4 2/4] t7508: fix bogus mtime verification Marc Strapetz via GitGitGadget
2022-01-07 11:17 ` [PATCH v4 3/4] t7508: add tests capturing racy timestamp handling Marc Strapetz via GitGitGadget
2022-01-07 11:17 ` [PATCH v4 4/4] update-index: refresh should rewrite index in case of racy timestamps Marc Strapetz via GitGitGadget
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