[PATCH v2] Work around ash "alternate value" expansion bug
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From: Ben Jackson <hidden>
Date: 2016-06-15 22:46:37
Subsystem:
the rest · Maintainer:
Linus Torvalds
Ash (used as /bin/sh on many distros) has a shell expansion bug
for the form ${var:+word word}. The result is a single argument
"word word". Work around by using ${var:+word} ${var:+word} or
equivalent.
Signed-off-by: Ben Jackson <redacted>
---
See http://thread.gmane.org/gmane.comp.version-control.git/116816 for
the original notes which describe the problem in more detail.
This version uses a different workaround suggested by Junio for
git-submodule which is less likely to be "cleaned up" back to the
original problem. Since new the change is more complex I beefed
up the new test slightly to ensure we are getting into the right case.
git-am.sh | 2 +-
git-submodule.sh | 11 +++++++++--
t/t7400-submodule-basic.sh | 10 ++++++++++
3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/git-am.sh b/git-am.sh
index bfc50c9..e539c60 100755
--- a/git-am.sh
+++ b/git-am.sh@@ -570,7 +570,7 @@ do GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE" export GIT_COMMITTER_DATE fi && - git commit-tree $tree ${parent:+-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 $this
diff --git a/git-submodule.sh b/git-submodule.sh
index 7c2e060..8e234a4 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh@@ -204,8 +204,15 @@ cmd_add() else module_clone "$path" "$realrepo" || exit - (unset GIT_DIR; cd "$path" && git checkout -f -q ${branch:+-b "$branch" "origin/$branch"}) || - die "Unable to checkout submodule '$path'" + ( + unset GIT_DIR + cd "$path" && + # ash fails to wordsplit ${branch:+-b "$branch"...} + case "$branch" in + '') git checkout -f -q ;; + ?*) git checkout -f -q -b "$branch" "origin/$branch" ;; + esac + ) || die "Unable to checkout submodule '$path'" fi git add "$path" ||
diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index af690ec..0f2ccc6 100755
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh@@ -64,6 +64,16 @@ test_expect_success 'submodule add' ' ) ' +test_expect_success 'submodule add --branch' ' + ( + cd addtest && + git submodule add -b initial "$submodurl" submod-branch && + git submodule init && + cd submod-branch && + git branch | grep initial + ) +' + test_expect_success 'submodule add with ./ in path' ' ( cd addtest &&
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1.6.0.1