People sometimes wonder why they cannot apply a patch that only
creates new files to an unborn branch.
Signed-off-by: Nanako Shiraishi <nanako3@xxxxxxxxxxx>
---
git-am.sh | 29 ++++++++++++++++++++++++-----
t/t4150-am.sh | 15 +++++++++++++++
2 files changed, 39 insertions(+), 5 deletions(-)
diff --git a/git-am.sh b/git-am.sh
index d339075..774383f 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -36,6 +36,13 @@ cd_to_toplevel
git var GIT_COMMITTER_IDENT >/dev/null ||
die "You need to set your committer info first"
+if git rev-parse --verify -q HEAD >/dev/null
+then
+ HAS_HEAD=yes
+else
+ HAS_HEAD=
+fi
+
sq () {
for sqarg
do
@@ -290,16 +297,26 @@ else
: >"$dotest/rebasing"
else
: >"$dotest/applying"
- git update-ref ORIG_HEAD HEAD
+ if test -n "$HAS_HEAD"
+ then
+ git update-ref ORIG_HEAD HEAD
+ else
+ git update-ref -d ORIG_HEAD >/dev/null 2>&1
+ fi
fi
fi
case "$resolved" in
'')
- files=$(git diff-index --cached --name-only HEAD --) || exit
+ case "$HAS_HEAD" in
+ '')
+ files=$(git ls-files) ;;
+ ?*)
+ files=$(git diff-index --cached --name-only HEAD --) ;;
+ esac || exit
if test "$files"
then
- : >"$dotest/dirtyindex"
+ test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
die "Dirty index: cannot apply patches (dirty: $files)"
fi
esac
@@ -541,18 +558,20 @@ do
fi
tree=$(git write-tree) &&
- parent=$(git rev-parse --verify HEAD) &&
commit=$(
if test -n "$ignore_date"
then
GIT_AUTHOR_DATE=
fi
+ parent=$(git rev-parse --verify -q HEAD) ||
+ echo >&2 "applying to an empty history"
+
if test -n "$committer_date_is_author_date"
then
GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
export GIT_COMMITTER_DATE
fi &&
- git commit-tree $tree -p $parent <"$dotest/final-commit"
+ git commit-tree $tree ${parent:+-p $parent} <"$dotest/final-commit"
) &&
git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
stop_here $this
diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index 5e65afa..b97d102 100755
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -290,4 +290,19 @@ test_expect_success 'am --ignore-date' '
echo "$at" | grep "+0000"
'
+test_expect_success 'am into an unborn branch' '
+ rm -fr subdir &&
+ mkdir -p subdir &&
+ git format-patch --numbered-files -o subdir -1 first &&
+ (
+ cd subdir &&
+ git init &&
+ git am 1
+ ) &&
+ result=$(
+ cd subdir && git rev-parse HEAD^{tree}
+ ) &&
+ test "z$result" = "z$(git rev-parse first^{tree})"
+'
+
test_done
--
1.6.2.2
--
Nanako Shiraishi
http://ivory.ap.teacup.com/nanako3/
--
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