The doc-diff script immediately resolves its two endpoints
to actual object ids, so that we can reuse cached results
even if they appear under a different name. But we still use
the original name the user fed us when running "git
checkout" in our temporary worktree. This can lead to
confusing results:
- the namespace inside the worktree is different than the
one outside. In particular, "./doc-diff origin HEAD"
will resolve HEAD inside the worktree, whose detached
HEAD will be pointing at origin! As a result, such a
diff would always be empty.
- worse, we will store this result under the oid we got by
resolving HEAD in the main worktree, thus polluting our
cache
- we didn't pass --detach, which meant that using a branch
name would cause us to actually check out that branch,
making it unavailable to other worktrees.
We can solve this by feeding the already-resolved object id
to git-checkout. That naturally forces a detached HEAD, but
just to make clear our expectation, let's explicitly pass
--detach.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
Another fixup for jk/diff-rendered-docs, noticed when trying it out on
Eric's worktree series (which, btw, rendered as expected once I fixed
this bug ;) ).
Documentation/doc-diff | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/Documentation/doc-diff b/Documentation/doc-diff
index 6e285e648c..c430fe7c99 100755
--- a/Documentation/doc-diff
+++ b/Documentation/doc-diff
@@ -82,7 +82,7 @@ generate_render_makefile () {
done
}
-# render_tree <dirname> <committish>
+# render_tree <committish_oid>
render_tree () {
# Skip install-man entirely if we already have an installed directory.
# We can't rely on make here, since "install-man" unconditionally
@@ -92,7 +92,7 @@ render_tree () {
# through.
if ! test -d "$tmp/installed/$1"
then
- git -C "$tmp/worktree" checkout "$2" &&
+ git -C "$tmp/worktree" checkout --detach "$1" &&
make -j$parallel -C "$tmp/worktree" \
GIT_VERSION=omitted \
SOURCE_DATE_EPOCH=0 \
@@ -112,6 +112,6 @@ render_tree () {
fi
}
-render_tree $from_oid "$from" &&
-render_tree $to_oid "$to" &&
+render_tree $from_oid &&
+render_tree $to_oid &&
git -C $tmp/rendered diff --no-index "$@" $from_oid $to_oid
--
2.19.0.rc1.9.gf8a776330b
