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[PATCH 1/3] use @@PERL@@ in built scripts

From
Jeff King <peff@peff.net>
Date
Oct 29, 2013, 01:19 UTC
Message-ID
<20131029011959.GA27738@sigill.intra.peff.net>
In-Reply-To
<20131029011859.GA22140@sigill.intra.peff.net>

Several of the built shell commands invoke a bare "perl" to perform some one-liners. This will use the first perl in the PATH rather than the one specified by the user's SHELL_PATH. We are not asking these perl invocations to do anything exotic, so typically any old system perl will do; however, in some cases the system perl may have unexpected behavior (e.g., by handling line endings differently). We should err on the side of using the perl the user pointed us to.

The downside of this is that on systems with a sane perl setup, we no longer find the perl at runtime, but instead point to a static perl (like /usr/bin/perl). That means we will not handle somebody moving perl without rebuilding git, whereas before we tracked it just fine. This is probably not a big deal, though, as the built perl scripts already suffered from this.

Signed-off-by: Jeff King <peff@peff.net>
---
 git-am.sh           | 4 ++--
 git-instaweb.sh     | 2 +-
 git-request-pull.sh | 2 +-
 git-submodule.sh    | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/git-am.sh b/git-am.sh
index 7ea40fe..bbea430 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -302,7 +302,7 @@ split_patches () {
 			# not starting with Author, From or Date is the
 			# subject, and the body starts with the next nonempty
 			# line not starting with Author, From or Date
-			perl -ne 'BEGIN { $subject = 0 }
+			@@PERL@@ -ne 'BEGIN { $subject = 0 }
 				if ($subject > 1) { print ; }
 				elsif (/^\s+$/) { next ; }
 				elsif (/^Author:/) { s/Author/From/ ; print ;}
@@ -334,7 +334,7 @@ split_patches () {
 			# Since we cannot guarantee that the commit message is in
 			# git-friendly format, we put no Subject: line and just consume
 			# all of the message as the body
-			LANG=C LC_ALL=C perl -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
+			LANG=C LC_ALL=C @@PERL@@ -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
 				if ($subject) { print ; }
 				elsif (/^\# User /) { s/\# User/From:/ ; print ; }
 				elsif (/^\# Date /) {
diff --git a/git-instaweb.sh b/git-instaweb.sh
index 01a1b05..e93a238 100755
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -581,7 +581,7 @@ EOF
 
 gitweb_conf() {
 	cat > "$fqgitdir/gitweb/gitweb_config.perl" <<EOF
-#!/usr/bin/perl
+#!@@PERL@@
 our \$projectroot = "$(dirname "$fqgitdir")";
 our \$git_temp = "$fqgitdir/gitweb/tmp";
 our \$projects_list = \$projectroot;
diff --git a/git-request-pull.sh b/git-request-pull.sh
index ebf1269..fe21d5d 100755
--- a/git-request-pull.sh
+++ b/git-request-pull.sh
@@ -106,7 +106,7 @@ find_matching_ref='
 	}
 '
 
-ref=$(git ls-remote "$url" | perl -e "$find_matching_ref" "$head" "$headrev" "$tag_name")
+ref=$(git ls-remote "$url" | @@PERL@@ -e "$find_matching_ref" "$head" "$headrev" "$tag_name")
 
 url=$(git ls-remote --get-url "$url")
 
diff --git a/git-submodule.sh b/git-submodule.sh
index 896f1c9..20ebf2e 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -156,7 +156,7 @@ module_list()
 		git ls-files -z --error-unmatch --stage -- "$@" ||
 		echo "unmatched pathspec exists"
 	) |
-	perl -e '
+	@@PERL@@ -e '
 	my %unmerged = ();
 	my ($null_sha1) = ("0" x 40);
 	my @out = ();
-- 
1.8.4.1.898.g8bf8a41.dirty
Previous: Jeff KingNext: Junio C Hamano
Message 14 of 24 in “Avoid broken Solaris tr”
  1. Avoid broken Solaris trBen Walton, Jun 18, 2013
  2. Junio C HamanoJun 18, 2013
  3. Ben WaltonOct 28, 2013
  4. Avoid difference in tr semantics between System V and BSDBen Walton, Oct 28, 2013
  5. Johannes SixtOct 28, 2013
  6. Jonathan NiederOct 28, 2013
  7. Junio C HamanoOct 28, 2013
  8. t/README: tests can use perl even with NO_PERLJonathan Nieder, Oct 28, 2013
  9. Johannes SixtOct 28, 2013
  10. Jeff KingOct 28, 2013
  11. Jonathan NiederOct 28, 2013
  12. Ben WaltonOct 28, 2013
  13. 0/3 perlJeff King, Oct 29, 2013
  14. 1/3 use @@PERL@@ in built scriptsJeff King, Oct 29, 2013
  15. Junio C HamanoOct 29, 2013
  16. 2/3 t: provide a perl() function which uses $PERL_PATHJeff King, Oct 29, 2013
  17. 3/3 t: use perl instead of "$PERL_PATH" where applicableJeff King, Oct 29, 2013
  18. Ben WaltonOct 28, 2013
  19. Ben WaltonOct 28, 2013
  20. Junio C HamanoOct 28, 2013
  21. Avoid difference in tr semantics between System V and BSDBen Walton, Oct 28, 2013
  22. Ben WaltonOct 28, 2013
  23. Avoid difference in tr semantics between System V and BSDBen Walton, Oct 28, 2013
  24. Junio C HamanoOct 30, 2013

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