diff mbox series

[v4,3/3] t9164: fix inability to find basename(1) in Subversion hooks

Message ID 6a7773aadba4fec5daa1e215a50ab122515ea456.1699596457.git.ps@pks.im (mailing list archive)
State Accepted
Commit 0856f13abaea5f8d3915dd60e7221e108ce14fdf
Headers show
Series t: improve compatibility with NixOS | expand

Commit Message

Patrick Steinhardt Nov. 10, 2023, 8:17 a.m. UTC
Hooks executed by Subversion are spawned with an empty environment. By
default, not even variables like PATH will be propagated to them. In
order to ensure that we're still able to find required executables, we
thus write the current PATH variable into the hook script itself and
then re-export it in t9164.

This happens too late in the script though, as we already tried to
execute the basename(1) utility before exporting the PATH variable. This
tends to work on most platforms as the fallback value of PATH for Bash
(see `getconf PATH`) is likely to contain this binary. But on more
exotic platforms like NixOS this is not the case, and thus the test
fails.

While we could work around this issue by simply setting PATH earlier, it
feels fragile to inject a user-controlled value into the script and have
the shell interpret it. Instead, we can refactor the hook setup to write
a `hooks-env` file that configures PATH for us. Like this, Subversion
will know to set up the environment as expected for all hooks.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 t/t9164-git-svn-dcommit-concurrent.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/t/t9164-git-svn-dcommit-concurrent.sh b/t/t9164-git-svn-dcommit-concurrent.sh
index c8e6c0733f4..d1dec89c3b7 100755
--- a/t/t9164-git-svn-dcommit-concurrent.sh
+++ b/t/t9164-git-svn-dcommit-concurrent.sh
@@ -46,6 +46,14 @@  setup_hook()
 			"passed to setup_hook" >&2 ; return 1; }
 	echo "cnt=$skip_revs" > "$hook_type-counter"
 	rm -f "$rawsvnrepo/hooks/"*-commit # drop previous hooks
+
+	# Subversion hooks run with an empty environment by default. We thus
+	# need to propagate PATH so that we can find executables.
+	cat >"$rawsvnrepo/conf/hooks-env" <<-EOF
+	[default]
+	PATH = ${PATH}
+	EOF
+
 	hook="$rawsvnrepo/hooks/$hook_type"
 	cat > "$hook" <<- 'EOF1'
 		#!/bin/sh
@@ -63,7 +71,6 @@  EOF1
 	if [ "$hook_type" = "pre-commit" ]; then
 		echo "echo 'commit disallowed' >&2; exit 1" >>"$hook"
 	else
-		echo "PATH=\"$PATH\"; export PATH" >>"$hook"
 		echo "svnconf=\"$svnconf\"" >>"$hook"
 		cat >>"$hook" <<- 'EOF2'
 			cd work-auto-commits.svn