Add test-scrap-cache-tree

A simple utility that invalidates all existing cache-tree data.  We
need this for tests.  (We don't need a tool to rebuild the cache-tree
data; git read-tree HEAD works for that.)

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/.gitignore b/.gitignore
index 8572c8c0b0199589a8c1875825f5b2e7e4dc4a86..122336c50462d34851d20b5033bfde15232ed83e 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -171,6 +171,7 @@
 /test-date
 /test-delta
 /test-dump-cache-tree
 /test-date
 /test-delta
 /test-dump-cache-tree

+/test-scrap-cache-tree

 /test-genrandom
 /test-index-version
 /test-line-buffer
 /test-genrandom
 /test-index-version
 /test-line-buffer

diff --git a/Makefile b/Makefile
index b1c80a678b5fdb80ec71f0a1ad567a384feba4e8..b9400bcad31121f57cd421a1407322e7cab50ffc 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -435,6 +435,7 @@ TEST_PROGRAMS_NEED_X += test-ctype
 TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree
 TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree

+TEST_PROGRAMS_NEED_X += test-scrap-cache-tree

 TEST_PROGRAMS_NEED_X += test-genrandom
 TEST_PROGRAMS_NEED_X += test-index-version
 TEST_PROGRAMS_NEED_X += test-line-buffer
 TEST_PROGRAMS_NEED_X += test-genrandom
 TEST_PROGRAMS_NEED_X += test-index-version
 TEST_PROGRAMS_NEED_X += test-line-buffer

diff --git a/test-scrap-cache-tree.c b/test-scrap-cache-tree.c
new file mode 100644 (file)
index 0000000..4728013
--- /dev/null
+++ b/test-scrap-cache-tree.c
@@ -0,0 +1,17 @@
+#include "cache.h"
+#include "tree.h"
+#include "cache-tree.h"
+
+static struct lock_file index_lock;
+
+int main(int ac, char **av)
+{
+       int fd = hold_locked_index(&index_lock, 1);
+       if (read_cache() < 0)
+               die("unable to read index file");
+       active_cache_tree = NULL;
+       if (write_cache(fd, active_cache, active_nr)
+           || commit_lock_file(&index_lock))
+               die("unable to write index file");
+       return 0;
+}