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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>
91 lines
2 KiB
Bash
91 lines
2 KiB
Bash
# This shell library is Git's interface to gettext.sh. See po/README
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# for usage instructions.
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#
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# Copyright (c) 2010 Ævar Arnfjörð Bjarmason
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#
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# Export the TEXTDOMAIN* data that we need for Git
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TEXTDOMAIN=git
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export TEXTDOMAIN
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if test -z "$GIT_TEXTDOMAINDIR"
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then
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TEXTDOMAINDIR="@@LOCALEDIR@@"
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else
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TEXTDOMAINDIR="$GIT_TEXTDOMAINDIR"
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fi
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export TEXTDOMAINDIR
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# First decide what scheme to use...
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GIT_INTERNAL_GETTEXT_SH_SCHEME=fallthrough
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if test -n "@@USE_GETTEXT_SCHEME@@"
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then
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GIT_INTERNAL_GETTEXT_SH_SCHEME="@@USE_GETTEXT_SCHEME@@"
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elif test -n "$GIT_INTERNAL_GETTEXT_TEST_FALLBACKS"
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then
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: no probing necessary
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elif test -n "$GIT_GETTEXT_POISON"
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then
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GIT_INTERNAL_GETTEXT_SH_SCHEME=poison
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elif type gettext.sh >/dev/null 2>&1
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then
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# GNU libintl's gettext.sh
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GIT_INTERNAL_GETTEXT_SH_SCHEME=gnu
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elif test "$(gettext -h 2>&1)" = "-h"
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then
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# gettext binary exists but no gettext.sh. likely to be a gettext
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# binary on a Solaris or something that is not GNU libintl and
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# lack eval_gettext.
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GIT_INTERNAL_GETTEXT_SH_SCHEME=gettext_without_eval_gettext
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fi
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export GIT_INTERNAL_GETTEXT_SH_SCHEME
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# ... and then follow that decision.
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case "$GIT_INTERNAL_GETTEXT_SH_SCHEME" in
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gnu)
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# Use libintl's gettext.sh, or fall back to English if we can't.
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. gettext.sh
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;;
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gettext_without_eval_gettext)
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# Solaris has a gettext(1) but no eval_gettext(1)
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eval_gettext () {
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gettext "$1" | (
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export PATH $(git sh-i18n--envsubst --variables "$1");
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git sh-i18n--envsubst "$1"
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)
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}
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;;
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poison)
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# Emit garbage so that tests that incorrectly rely on translatable
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# strings will fail.
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gettext () {
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printf "%s" "# GETTEXT POISON #"
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}
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eval_gettext () {
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printf "%s" "# GETTEXT POISON #"
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}
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;;
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*)
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gettext () {
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printf "%s" "$1"
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}
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eval_gettext () {
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printf "%s" "$1" | (
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export PATH $(git sh-i18n--envsubst --variables "$1");
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git sh-i18n--envsubst "$1"
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)
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}
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;;
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esac
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# Git-specific wrapper functions
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gettextln () {
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gettext "$1"
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echo
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}
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eval_gettextln () {
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eval_gettext "$1"
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echo
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}
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