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environment: add GIT_PREFIX to local_repo_env

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The GIT_PREFIX variable is set based on our location within
the working tree. It should therefore be cleared whenever
GIT_WORK_TREE is cleared.

In practice, this doesn't cause any bugs, because none of
the sub-programs we invoke with local_repo_env cleared
actually care about GIT_PREFIX. But this is the right thing
to do, and future proofs us against that assumption changing.

While we're at it, let's define a GIT_PREFIX_ENVIRONMENT
macro; this avoids repetition of the string literal, which
can help catch any spelling mistakes in the code.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2013-03-08 04:30:25 -05:00 committed by Junio C Hamano
parent 2163e5dbb4
commit a6f7f9a325
3 changed files with 4 additions and 2 deletions
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1
cache.h
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@ -345,6 +345,7 @@ static inline enum object_type object_type(unsigned int mode)
#define GIT_DIR_ENVIRONMENT "GIT_DIR"
#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"

1
environment.c
View File

@ -88,6 +88,7 @@ const char * const local_repo_env[] = {
GRAFT_ENVIRONMENT,
INDEX_ENVIRONMENT,
NO_REPLACE_OBJECTS_ENVIRONMENT,
GIT_PREFIX_ENVIRONMENT,
NULL
};

4
setup.c
View File

@ -768,9 +768,9 @@ const char *setup_git_directory_gently(int *nongit_ok)
prefix = setup_git_directory_gently_1(nongit_ok);
if (prefix)
setenv("GIT_PREFIX", prefix, 1);
setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
else
setenv("GIT_PREFIX", "", 1);
setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
if (startup_info) {
startup_info->have_repository = !nongit_ok || !*nongit_ok;