diff options
| -rw-r--r-- | Documentation/git.txt | 5 | ||||
| -rw-r--r-- | read-cache.c | 21 | ||||
| -rwxr-xr-x | t/t1600-index.sh | 49 |
3 files changed, 74 insertions, 1 deletions
diff --git a/Documentation/git.txt b/Documentation/git.txt index 02bbc084b8..27a199ca1a 100644 --- a/Documentation/git.txt +++ b/Documentation/git.txt @@ -720,6 +720,11 @@ Git so take care if using Cogito etc. index file. If not specified, the default of `$GIT_DIR/index` is used. +'GIT_INDEX_VERSION':: + This environment variable allows the specification of an index + version for new repositories. It won't affect existing index + files. By default index file version [23] is used. + 'GIT_OBJECT_DIRECTORY':: If the object storage directory is specified via this environment variable then the sha1 directories are created diff --git a/read-cache.c b/read-cache.c index 33dd676ccb..efc4aaed98 100644 --- a/read-cache.c +++ b/read-cache.c @@ -1219,6 +1219,25 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int reall #define INDEX_FORMAT_DEFAULT 3 +static unsigned int get_index_format_default(void) +{ + char *envversion = getenv("GIT_INDEX_VERSION"); + if (!envversion) { + return INDEX_FORMAT_DEFAULT; + } else { + char *endp; + unsigned int version = strtoul(envversion, &endp, 10); + + if (*endp || + version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) { + warning(_("GIT_INDEX_VERSION set, but the value is invalid.\n" + "Using version %i"), INDEX_FORMAT_DEFAULT); + version = INDEX_FORMAT_DEFAULT; + } + return version; + } +} + /* * dev/ino/uid/gid/size are also just tracked to the low 32 bits * Again - this is just a (very strong in practice) heuristic that @@ -1795,7 +1814,7 @@ int write_index(struct index_state *istate, int newfd) } if (!istate->version) - istate->version = INDEX_FORMAT_DEFAULT; + istate->version = get_index_format_default(); /* demote version 3 to version 2 when the latter suffices */ if (istate->version == 3 || istate->version == 2) diff --git a/t/t1600-index.sh b/t/t1600-index.sh new file mode 100755 index 0000000000..6195c55702 --- /dev/null +++ b/t/t1600-index.sh @@ -0,0 +1,49 @@ +#!/bin/sh + +test_description='index file specific tests' + +. ./test-lib.sh + +test_expect_success 'setup' ' + echo 1 >a +' + +test_expect_success 'bogus GIT_INDEX_VERSION issues warning' ' + ( + rm -f .git/index && + GIT_INDEX_VERSION=2bogus && + export GIT_INDEX_VERSION && + git add a 2>&1 | sed "s/[0-9]//" >actual.err && + sed -e "s/ Z$/ /" <<-\EOF >expect.err && + warning: GIT_INDEX_VERSION set, but the value is invalid. + Using version Z + EOF + test_i18ncmp expect.err actual.err + ) +' + +test_expect_success 'out of bounds GIT_INDEX_VERSION issues warning' ' + ( + rm -f .git/index && + GIT_INDEX_VERSION=1 && + export GIT_INDEX_VERSION && + git add a 2>&1 | sed "s/[0-9]//" >actual.err && + sed -e "s/ Z$/ /" <<-\EOF >expect.err && + warning: GIT_INDEX_VERSION set, but the value is invalid. + Using version Z + EOF + test_i18ncmp expect.err actual.err + ) +' + +test_expect_success 'no warning with bogus GIT_INDEX_VERSION and existing index' ' + ( + GIT_INDEX_VERSION=1 && + export GIT_INDEX_VERSION && + git add a 2>actual.err && + >expect.err && + test_i18ncmp expect.err actual.err + ) +' + +test_done |