t: test cleanup stemming from experimentally enabling pipefail

Hi Junio,

Sorry for the confusion. Looking it over, I see that the sed expression you proposed indeed makes the intent a lot clearer. Here's a replacement series for the last five commits of the branch.

I would've opted to send out a single replacement patch but this change causes some minor textual conflicts in 4/5 so this should make your life a little easier ;)

Denton Liu (5):
t7700: consolidate code into test_no_missing_in_packs()
t7700: consolidate code into test_has_duplicate_object()
t7700: replace egrep with grep
t7700: make references to SHA-1 generic
t7700: stop losing return codes of git commands

 t/t7700-repack.sh | 165 ++++++++++++++++------------------------------
 1 file changed, 57 insertions(+), 108 deletions(-)

Range-diff against v5:
1: a99a45cb6f ! 1: 3008ce8deb t7700: consolidate code into test_no_missing_in_packs()
@@ Commit message
Refactor the resulting extraction so that if any git commands fail, their return codes are not silently lost.

- We were using sed to filter lines. Although not incorrect, this is
- exactly what grep is built for. Replace this invocation of sed with grep
- so that we use the correct tool for the job.
-
Instead of verifying each file of alt_objects/pack/*.idx individually in a for-loop, batch them together into one verification step.

The original testing construct was O(n^2): it used a grep in a loop to test whether any objects were missing in the packfile. Rewrite this to
- sort the files then use comm -23 so that finding missing lines from
- the original file is done more efficiently.
+ extract the hash using sed or cut, sort the files, then use comm -23
+ so that finding missing lines from the original file is done more
+ efficiently.

While we're at it, add a space to commit_and_pack () for style.

@@ t/t7700-repack.sh: test_description='git repack works correctly'
+ myidx=$(ls -1 .git/objects/pack/*.idx) &&
+ test_path_is_file "$myidx" &&
+ git verify-pack -v alt_objects/pack/*.idx >orig.raw &&
-+ grep "^[0-9a-f]\{40\}" orig.raw | cut -d" " -f1 | sort >orig &&
++ sed -n -e "s/^\([0-9a-f]\{40\}\).*/\1/p" orig.raw | sort >orig &&
+ git verify-pack -v $myidx >dest.raw &&
+ cut -d" " -f1 dest.raw | sort >dest &&
+ comm -23 orig dest >missing &&

2:  f79240e937 = 2:  f3a0470edc t7700: consolidate code into test_has_duplicate_object()
3:  632a62f6e9 = 3:  c34477a5a9 t7700: replace egrep with grep
4:  bf70cc5a0d ! 4:  113f375192 t7700: make references to SHA-1 generic
    @@ t/t7700-repack.sh: test_description='git repack works correctly'
      	myidx=$(ls -1 .git/objects/pack/*.idx) &&
      	test_path_is_file "$myidx" &&
      	git verify-pack -v alt_objects/pack/*.idx >orig.raw &&
    --	grep "^[0-9a-f]\{40\}" orig.raw | cut -d" " -f1 | sort >orig &&
    -+	grep "^$OID_REGEX" orig.raw | cut -d" " -f1 | sort >orig &&
    +-	sed -n -e "s/^\([0-9a-f]\{40\}\).*/\1/p" orig.raw | sort >orig &&
    ++	sed -n -e "s/^\($OID_REGEX\).*/\1/p" orig.raw | sort >orig &&
      	git verify-pack -v $myidx >dest.raw &&
      	cut -d" " -f1 dest.raw | sort >dest &&
      	comm -23 orig dest >missing &&

5: 1f6d9a80ad = 5: ab653bd76f t7700: stop losing return codes of git commands

2.24.0.578.g4820254054