git/t/t7401-submodule-summary.sh
Johan Herland 3deea89c5f submodule summary: Don't barf when invoked in an empty repo
When invoking "git submodule summary" in an empty repo (which can be
indirectly done by setting status.submodulesummary = true), it currently
emits an error message (via "git diff-index") since HEAD points to an
unborn branch.

This patch adds handling of the HEAD-points-to-unborn-branch special case,
so that "git submodule summary" no longer emits this error message.

The patch also adds a test case that verifies the fix.

Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-17 11:14:04 -08:00

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#!/bin/sh
#
# Copyright (c) 2008 Ping Yin
#
test_description='Summary support for submodules
This test tries to verify the sanity of summary subcommand of git submodule.
'
. ./test-lib.sh
add_file () {
sm=$1
shift
owd=$(pwd)
cd "$sm"
for name; do
echo "$name" > "$name" &&
git add "$name" &&
test_tick &&
git commit -m "Add $name"
done >/dev/null
git rev-parse --verify HEAD | cut -c1-7
cd "$owd"
}
commit_file () {
test_tick &&
git commit "$@" -m "Commit $*" >/dev/null
}
test_create_repo sm1 &&
add_file . foo >/dev/null
head1=$(add_file sm1 foo1 foo2)
test_expect_success 'added submodule' "
git add sm1 &&
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 0000000...$head1 (2):
> Add foo2
EOF
"
commit_file sm1 &&
head2=$(add_file sm1 foo3)
test_expect_success 'modified submodule(forward)' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head1...$head2 (1):
> Add foo3
EOF
"
test_expect_success 'modified submodule(forward), --files' "
git submodule summary --files >actual &&
diff actual - <<-EOF
* sm1 $head1...$head2 (1):
> Add foo3
EOF
"
commit_file sm1 &&
cd sm1 &&
git reset --hard HEAD~2 >/dev/null &&
head3=$(git rev-parse --verify HEAD | cut -c1-7) &&
cd ..
test_expect_success 'modified submodule(backward)' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head2...$head3 (2):
< Add foo3
< Add foo2
EOF
"
head4=$(add_file sm1 foo4 foo5) &&
head4_full=$(GIT_DIR=sm1/.git git rev-parse --verify HEAD)
test_expect_success 'modified submodule(backward and forward)' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head2...$head4 (4):
> Add foo5
> Add foo4
< Add foo3
< Add foo2
EOF
"
test_expect_success '--summary-limit' "
git submodule summary -n 3 >actual &&
diff actual - <<-EOF
* sm1 $head2...$head4 (4):
> Add foo5
> Add foo4
< Add foo3
EOF
"
commit_file sm1 &&
mv sm1 sm1-bak &&
echo sm1 >sm1 &&
head5=$(git hash-object sm1 | cut -c1-7) &&
git add sm1 &&
rm -f sm1 &&
mv sm1-bak sm1
test_expect_success 'typechanged submodule(submodule->blob), --cached' "
git submodule summary --cached >actual &&
diff actual - <<-EOF
* sm1 $head4(submodule)->$head5(blob) (3):
< Add foo5
EOF
"
test_expect_success 'typechanged submodule(submodule->blob), --files' "
git submodule summary --files >actual &&
diff actual - <<-EOF
* sm1 $head5(blob)->$head4(submodule) (3):
> Add foo5
EOF
"
rm -rf sm1 &&
git checkout-index sm1
test_expect_success 'typechanged submodule(submodule->blob)' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head4(submodule)->$head5(blob):
EOF
"
rm -f sm1 &&
test_create_repo sm1 &&
head6=$(add_file sm1 foo6 foo7)
test_expect_success 'nonexistent commit' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head4...$head6:
Warn: sm1 doesn't contain commit $head4_full
EOF
"
commit_file
test_expect_success 'typechanged submodule(blob->submodule)' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head5(blob)->$head6(submodule) (2):
> Add foo7
EOF
"
commit_file sm1 &&
rm -rf sm1
test_expect_success 'deleted submodule' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head6...0000000:
EOF
"
test_create_repo sm2 &&
head7=$(add_file sm2 foo8 foo9) &&
git add sm2
test_expect_success 'multiple submodules' "
git submodule summary >actual &&
diff actual - <<-EOF
* sm1 $head6...0000000:
* sm2 0000000...$head7 (2):
> Add foo9
EOF
"
test_expect_success 'path filter' "
git submodule summary sm2 >actual &&
diff actual - <<-EOF
* sm2 0000000...$head7 (2):
> Add foo9
EOF
"
commit_file sm2
test_expect_success 'given commit' "
git submodule summary HEAD^ >actual &&
diff actual - <<-EOF
* sm1 $head6...0000000:
* sm2 0000000...$head7 (2):
> Add foo9
EOF
"
test_expect_success '--for-status' "
git submodule summary --for-status HEAD^ >actual &&
test_cmp actual - <<EOF
# Submodule changes to be committed:
#
# * sm1 $head6...0000000:
#
# * sm2 0000000...$head7 (2):
# > Add foo9
#
EOF
"
test_expect_success 'fail when using --files together with --cached' "
test_must_fail git submodule summary --files --cached
"
test_expect_success 'should not fail in an empty repo' "
git init xyzzy &&
cd xyzzy &&
git submodule summary >output 2>&1 &&
test_cmp output /dev/null
"
test_done