From 882b08e7beaa2c62f6f200fe22854b405774dc33 Mon Sep 17 00:00:00 2001
From: "Kyle J. McKay" <mackyle@gmail.com>
Date: Sun, 10 Jul 2016 07:12:29 -0700
Subject: [PATCH] hg-fast-export.sh: prune notes on missing marks

If --hg-hash is given and any marks were found to be missing (i.e. gc'd),
prune the refs/notes/hg tree if it exists.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
---
 hg-fast-export.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hg-fast-export.sh b/hg-fast-export.sh
index 35d9860..331979c 100755
--- a/hg-fast-export.sh
+++ b/hg-fast-export.sh
@@ -94,6 +94,17 @@ if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" -a -s "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
   LC_ALL=C sed 's/^:\([^ ][^ ]*\) \([^ ][^ ]*\)$/\2 \1/' <"$GIT_DIR/$PFX-$SFX_MARKS" | \
   git cat-file --batch-check=':%(rest) %(objectname)' | \
   LC_ALL=C sed '/ missing$/d' >"$GIT_DIR/$PFX-$SFX_MARKS.old"
+  notes=
+  for arg; do if [ "$arg" = "--hg-hash" ]; then notes=1; break; fi; done
+  # for --hg-hash run "notes prune" on refs/notes/hg if it exists and any marks were missing
+  if [ -n "$notes" ] && \
+     git rev-parse --quiet --verify refs/notes/hg >/dev/null && \
+     ! LC_ALL=C cmp -s "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"; then
+    nm='hg-fast-export'
+    GIT_AUTHOR_NAME="$nm" GIT_COMMITTER_NAME="$nm" \
+    GIT_AUTHOR_EMAIL="$nm" GIT_COMMITTER_EMAIL="$nm" \
+    git notes --ref=refs/notes/hg prune
+  fi
 else
   # make sure we have a marks cache
   >"$GIT_DIR/$PFX-$SFX_MARKS.old"
-- 
2.11.4.GIT