`usage` tries to call $0, which might very well be "./doc-diff", so if
we `cd_to_toplevel` before calling `usage`, we'll end with an error to
the effect of "./doc-diff: not found" rather than a friendly `doc-diff
-h` output. This regressed in ad51743007 ("doc-diff: add --clean mode to
remove temporary working gunk", 2018-08-31) where we moved the call to
`cd_to_toplevel` to much earlier.
A general fix might be to teach git-sh-setup to save away the absolute
path for $0 and then use that, instead. I'm not aware of any portable
way of doing that, see, e.g., d2addc3b96 ("t7800: readlink may not be
available", 2016-05-31).
An early version of this patch moved `cd_to_toplevel` back to where it
was before ad51743007 and taught the "--clean" code to cd on its own.
But let's try instead to get rid of the cd-ing entirely. We don't really
need it and we can work with absolute paths instead. There's just one
use of $PWD that we need to adjust by simply dropping it.
Suggested-by: Jeff King <peff@xxxxxxxx>
Signed-off-by: Martin Ågren <martin.agren@xxxxxxxxx>
---
Thanks Peff for the suggestions. Trying not to cd at all seems sane to
me. That it allows `./Documentation/doc-diff` is a bonus, I guess, but
you're right that it's probably nothing anyone will use.
I've verified that diffs produced by `./Documentation/doc-diff foo bar`
and `./doc-diff foo bar` are identical, FWIW.
Martin
Documentation/doc-diff | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/Documentation/doc-diff b/Documentation/doc-diff
index dfd9418778..32c83dd26f 100755
--- a/Documentation/doc-diff
+++ b/Documentation/doc-diff
@@ -39,8 +39,7 @@ do
shift
done
-cd_to_toplevel
-tmp=Documentation/tmp-doc-diff
+tmp="$(git rev-parse --show-toplevel)/Documentation/tmp-doc-diff" || exit 1
if test -n "$clean"
then
@@ -109,7 +108,7 @@ render_tree () {
make -j$parallel -C "$tmp/worktree" \
GIT_VERSION=omitted \
SOURCE_DATE_EPOCH=0 \
- DESTDIR="$PWD/$tmp/installed/$1+" \
+ DESTDIR="$tmp/installed/$1+" \
install-man &&
mv "$tmp/installed/$1+" "$tmp/installed/$1"
fi &&
--
2.20.1.390.gb5101f9297
