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11d62145b9
In a shell snippet meant to be sourced by other shell scripts, an
opening #! line does more harm than good.
The harm:
- When the shell library is sourced, the interpreter and options from
the #! line are not used. Specifying a particular shell can
confuse the reader into thinking it is safe for the shell library
to rely on idiosyncrasies of that shell.
- Using #! instead of a plain comment drops a helpful visual clue
that this is a shell library and not a self-contained script.
- Tools such as lintian can use a #! line to tell when an
installation script has failed by forgetting to set a script
executable. This check does not work if shell libraries also start
with a #! line.
The good:
- Text editors notice the #! line and use it for syntax highlighting
if you try to edit the installed scripts (without ".sh" suffix) in
place.
The use of the #! for file type detection is not needed because Git's
shell libraries are meant to be edited in source form (with ".sh"
suffix). Replace the opening #! lines with comments.
This involves tweaking the test harness's valgrind support to find
shell libraries by looking for "# " in the first line instead of "#!"
(see v1.7.6-rc3~7, 2011-06-17).
Suggested by Russ Allbery through lintian. Thanks to Jeff King and
Clemens Buchacher for further analysis.
Tested by searching for non-executable scripts with #! line:
find . -name .git -prune -o -type f -not -executable |
while read file
do
read line <"$file"
case $line in
'#!'*)
echo "$file"
;;
esac
done
The only remaining scripts found are templates for shell scripts
(unimplemented.sh, wrap-for-bin.sh) and sample input used in tests
(t/t4034/perl/{pre,post}).
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
89 lines
2.3 KiB
Bash
89 lines
2.3 KiB
Bash
# This is a shell library to calculate the remote repository and
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# upstream branch that should be pulled by "git pull" from the current
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# branch.
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# git-ls-remote could be called from outside a git managed repository;
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# this would fail in that case and would issue an error message.
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GIT_DIR=$(git rev-parse -q --git-dir) || :;
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get_default_remote () {
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curr_branch=$(git symbolic-ref -q HEAD)
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curr_branch="${curr_branch#refs/heads/}"
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origin=$(git config --get "branch.$curr_branch.remote")
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echo ${origin:-origin}
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}
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get_remote_merge_branch () {
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case "$#" in
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0|1)
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origin="$1"
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default=$(get_default_remote)
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test -z "$origin" && origin=$default
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curr_branch=$(git symbolic-ref -q HEAD) &&
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[ "$origin" = "$default" ] &&
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echo $(git for-each-ref --format='%(upstream)' $curr_branch)
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;;
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*)
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repo=$1
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shift
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ref=$1
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# FIXME: It should return the tracking branch
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# Currently only works with the default mapping
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case "$ref" in
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+*)
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ref=$(expr "z$ref" : 'z+\(.*\)')
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;;
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esac
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expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
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remote=$(expr "z$ref" : 'z\([^:]*\):')
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case "$remote" in
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'' | HEAD ) remote=HEAD ;;
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heads/*) remote=${remote#heads/} ;;
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refs/heads/*) remote=${remote#refs/heads/} ;;
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refs/* | tags/* | remotes/* ) remote=
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esac
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[ -n "$remote" ] && case "$repo" in
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.)
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echo "refs/heads/$remote"
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;;
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*)
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echo "refs/remotes/$repo/$remote"
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;;
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esac
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esac
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}
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error_on_missing_default_upstream () {
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cmd="$1"
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op_type="$2"
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op_prep="$3"
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example="$4"
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branch_name=$(git symbolic-ref -q HEAD)
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# If there's only one remote, use that in the suggestion
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remote="<remote>"
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if test $(git remote | wc -l) = 1
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then
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remote=$(git remote)
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fi
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if test -z "$branch_name"
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then
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echo "You are not currently on a branch. Please specify which
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branch you want to $op_type $op_prep. See git-${cmd}(1) for details.
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$example
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"
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else
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echo "There is no tracking information for the current branch.
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Please specify which branch you want to $op_type $op_prep.
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See git-${cmd}(1) for details
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$example
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If you wish to set tracking information for this branch you can do so with:
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git branch --set-upstream-to=$remote/<branch> ${branch_name#refs/heads/}
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"
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fi
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exit 1
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}
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