git/t/t6200-fmt-merge-msg.sh
Junio C Hamano 418a1435f1 fmt-merge-msg: show those involved in a merged series
As we already walk the history of the branch that gets merged to
come up with a short log, let's label it with names of the primary
authors, so that the user who summarizes the merge can easily give
credit to them in the log message.

Also infer the names of "lieutents" to help integrators at higher
level of the food-chain to give credit to them, by counting:

 * The committer of the 'tip' commit that is merged
 * The committer of merge commits that are merged

Often the first one gives the owner of the history being pulled, but
his last pull from his sublieutenants may have been a fast-forward,
in which case the first one would not be.  The latter rule will
count the integrator of the history, so together it might be a
reasonable heuristics.

There are two special cases:

 - The "author" credit is omitted when the series is written solely
   by the same author who is making the merge. The name can be seen
   on the "Author" line of the "git log" output to view the log
   message anyway.

 - The "lieutenant" credit is omitted when there is only one key
   committer in the merged branch and it is the committer who is
   making the merge. Typically this applies to the case where the
   developer merges his own branch.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-13 20:44:29 -07:00

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#!/bin/sh
#
# Copyright (c) 2006, Junio C Hamano
#
test_description='fmt-merge-msg test'
. ./test-lib.sh
test_expect_success setup '
echo one >one &&
git add one &&
test_tick &&
git commit -m "Initial" &&
git clone . remote &&
echo uno >one &&
echo dos >two &&
git add two &&
test_tick &&
git commit -a -m "Second" &&
git checkout -b left &&
echo "c1" >one &&
test_tick &&
git commit -a -m "Common #1" &&
echo "c2" >one &&
test_tick &&
git commit -a -m "Common #2" &&
git branch right &&
echo "l3" >two &&
test_tick &&
GIT_COMMITTER_NAME="Another Committer" \
GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #3" &&
echo "l4" >two &&
test_tick &&
GIT_COMMITTER_NAME="Another Committer" \
GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #4" &&
echo "l5" >two &&
test_tick &&
GIT_COMMITTER_NAME="Another Committer" \
GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #5" &&
git tag tag-l5 &&
git checkout right &&
echo "r3" >three &&
git add three &&
test_tick &&
git commit -a -m "Right #3" &&
git tag tag-r3 &&
echo "r4" >three &&
test_tick &&
git commit -a -m "Right #4" &&
echo "r5" >three &&
test_tick &&
git commit -a -m "Right #5" &&
git checkout -b long &&
i=0 &&
while test $i -lt 30
do
test_commit $i one &&
i=$(($i+1))
done &&
git show-branch &&
apos="'\''"
'
test_expect_success 'message for merging local branch' '
echo "Merge branch ${apos}left${apos}" >expected &&
git checkout master &&
git fetch . left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'message for merging external branch' '
echo "Merge branch ${apos}left${apos} of $(pwd)" >expected &&
git checkout master &&
git fetch "$(pwd)" left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '[merge] summary/log configuration' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
By Another Author (3) and A U Thor (2)
via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
git config merge.log true &&
test_might_fail git config --unset-all merge.summary &&
git checkout master &&
test_tick &&
git fetch . left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&
test_might_fail git config --unset-all merge.log &&
git config merge.summary true &&
git checkout master &&
test_tick &&
git fetch . left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&
test_cmp expected actual1 &&
test_cmp expected actual2
'
test_expect_success 'setup: clear [merge] configuration' '
test_might_fail git config --unset-all merge.log &&
test_might_fail git config --unset-all merge.summary
'
test_expect_success 'setup FETCH_HEAD' '
git checkout master &&
test_tick &&
git fetch . left
'
test_expect_success 'merge.log=3 limits shortlog length' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
By Another Author (3) and A U Thor (2)
via Another Committer
* left: (5 commits)
Left #5
Left #4
Left #3
...
EOF
git -c merge.log=3 fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge.log=5 shows all 5 commits' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
By Another Author (3) and A U Thor (2)
via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
git -c merge.log=5 fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge.log=0 disables shortlog' '
echo "Merge branch ${apos}left${apos}" >expected
git -c merge.log=0 fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=3 limits shortlog length' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
By Another Author (3) and A U Thor (2)
via Another Committer
* left: (5 commits)
Left #5
Left #4
Left #3
...
EOF
git fmt-merge-msg --log=3 <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=5 shows all 5 commits' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
By Another Author (3) and A U Thor (2)
via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
git fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--no-log disables shortlog' '
echo "Merge branch ${apos}left${apos}" >expected &&
git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=0 disables shortlog' '
echo "Merge branch ${apos}left${apos}" >expected &&
git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'fmt-merge-msg -m' '
echo "Sync with left" >expected &&
cat >expected.log <<-EOF &&
Sync with left
By Another Author (3) and A U Thor (2)
via Another Committer
* ${apos}left${apos} of $(pwd):
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_might_fail git config --unset merge.log &&
test_might_fail git config --unset merge.summary &&
git checkout master &&
git fetch "$(pwd)" left &&
git fmt-merge-msg -m "Sync with left" <.git/FETCH_HEAD >actual &&
git fmt-merge-msg --log -m "Sync with left" \
<.git/FETCH_HEAD >actual.log &&
git config merge.log true &&
git fmt-merge-msg -m "Sync with left" \
<.git/FETCH_HEAD >actual.log-config &&
git fmt-merge-msg --no-log -m "Sync with left" \
<.git/FETCH_HEAD >actual.nolog &&
test_cmp expected actual &&
test_cmp expected.log actual.log &&
test_cmp expected.log actual.log-config &&
test_cmp expected actual.nolog
'
test_expect_success 'setup: expected shortlog for two branches' '
cat >expected <<-EOF
Merge branches ${apos}left${apos} and ${apos}right${apos}
By Another Author (3) and A U Thor (2)
via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
* right:
Right #5
Right #4
Right #3
Common #2
Common #1
EOF
'
test_expect_success 'shortlog for two branches' '
git config merge.log true &&
test_might_fail git config --unset-all merge.summary &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&
test_might_fail git config --unset-all merge.log &&
git config merge.summary true &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&
git config merge.log yes &&
test_might_fail git config --unset-all merge.summary &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual3 &&
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual4 &&
test_cmp expected actual1 &&
test_cmp expected actual2 &&
test_cmp expected actual3 &&
test_cmp expected actual4
'
test_expect_success 'merge-msg -F' '
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg -F .git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg -F in subdirectory' '
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . left right &&
mkdir sub &&
cp .git/FETCH_HEAD sub/FETCH_HEAD &&
(
cd sub &&
git fmt-merge-msg -F FETCH_HEAD >../actual
) &&
test_cmp expected actual
'
test_expect_success 'merge-msg with nothing to merge' '
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
>empty &&
(
cd remote &&
git checkout -b unrelated &&
test_tick &&
git fetch origin &&
git fmt-merge-msg <.git/FETCH_HEAD >../actual
) &&
test_cmp empty actual
'
test_expect_success 'merge-msg tag' '
cat >expected <<-EOF &&
Merge tag ${apos}tag-r3${apos}
* tag ${apos}tag-r3${apos}:
Right #3
Common #2
Common #1
EOF
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . tag tag-r3 &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg two tags' '
cat >expected <<-EOF &&
Merge tags ${apos}tag-r3${apos} and ${apos}tag-l5${apos}
* tag ${apos}tag-r3${apos}:
Right #3
Common #2
Common #1
By Another Author (3) and A U Thor (2)
via Another Committer
* tag ${apos}tag-l5${apos}:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . tag tag-r3 tag tag-l5 &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg tag and branch' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}, tag ${apos}tag-r3${apos}
* tag ${apos}tag-r3${apos}:
Right #3
Common #2
Common #1
By Another Author (3) and A U Thor (2)
via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_might_fail git config --unset-all merge.log &&
git config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . tag tag-r3 left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg lots of commits' '
{
cat <<-EOF &&
Merge branch ${apos}long${apos}
* long: (35 commits)
EOF
i=29 &&
while test $i -gt 9
do
echo " $i" &&
i=$(($i-1))
done &&
echo " ..."
} >expected &&
git checkout master &&
test_tick &&
git fetch . long &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_done