From 4b480c6716a7d8e20e7e510827ea81e7939f335a Mon Sep 17 00:00:00 2001
From: Nicolas Pitre <nico@cam.org>
Date: Fri, 22 Aug 2008 15:45:53 -0400
Subject: [PATCH] discard revindex data when pack list changes

This is needed to fix verify-pack -v with multiple pack arguments.

Also, in theory, revindex data (if any) must be discarded whenever
reprepare_packed_git() is called. In practice this is hard to trigger
though.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin-verify-pack.c  |  3 ++-
 pack-revindex.c        | 12 ++++++++++++
 pack-revindex.h        |  1 +
 sha1_file.c            |  1 +
 t/t5300-pack-object.sh |  6 ++++++
 5 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/builtin-verify-pack.c b/builtin-verify-pack.c
index f4ac595695..25a29f11a4 100644
--- a/builtin-verify-pack.c
+++ b/builtin-verify-pack.c
@@ -1,7 +1,7 @@
 #include "builtin.h"
 #include "cache.h"
 #include "pack.h"
-
+#include "pack-revindex.h"
 
 #define MAX_CHAIN 50
 
@@ -129,6 +129,7 @@ int cmd_verify_pack(int argc, const char **argv, const char *prefix)
 		else {
 			if (verify_one_pack(argv[1], verbose))
 				err = 1;
+			discard_revindex();
 			nothing_done = 0;
 		}
 		argc--; argv++;
diff --git a/pack-revindex.c b/pack-revindex.c
index cd300bdff5..6096b6224a 100644
--- a/pack-revindex.c
+++ b/pack-revindex.c
@@ -142,3 +142,15 @@ struct revindex_entry *find_pack_revindex(struct packed_git *p, off_t ofs)
 	} while (lo < hi);
 	die("internal error: pack revindex corrupt");
 }
+
+void discard_revindex(void)
+{
+	if (pack_revindex_hashsz) {
+		int i;
+		for (i = 0; i < pack_revindex_hashsz; i++)
+			if (pack_revindex[i].revindex)
+				free(pack_revindex[i].revindex);
+		free(pack_revindex);
+		pack_revindex_hashsz = 0;
+	}
+}
diff --git a/pack-revindex.h b/pack-revindex.h
index 36a514a6cf..8d5027ad91 100644
--- a/pack-revindex.h
+++ b/pack-revindex.h
@@ -7,5 +7,6 @@ struct revindex_entry {
 };
 
 struct revindex_entry *find_pack_revindex(struct packed_git *p, off_t ofs);
+void discard_revindex(void);
 
 #endif
diff --git a/sha1_file.c b/sha1_file.c
index 32e4664b1b..477d3fb4b0 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -990,6 +990,7 @@ void prepare_packed_git(void)
 
 void reprepare_packed_git(void)
 {
+	discard_revindex();
 	prepare_packed_git_run_once = 0;
 	prepare_packed_git();
 }
diff --git a/t/t5300-pack-object.sh b/t/t5300-pack-object.sh
index 645583f9d7..83abe5f25e 100755
--- a/t/t5300-pack-object.sh
+++ b/t/t5300-pack-object.sh
@@ -186,6 +186,12 @@ test_expect_success \
 			test-2-${packname_2}.idx \
 			test-3-${packname_3}.idx'
 
+test_expect_success \
+    'verify pack -v' \
+    'git verify-pack -v	test-1-${packname_1}.idx \
+			test-2-${packname_2}.idx \
+			test-3-${packname_3}.idx'
+
 test_expect_success \
     'verify-pack catches mismatched .idx and .pack files' \
     'cat test-1-${packname_1}.idx >test-3.idx &&