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repository: require a build flag to use SHA-256

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At this point, SHA-256 support is experimental and some behavior may
change. To avoid surprising unsuspecting users, require a build flag,
ENABLE_SHA256, to allow use of a non-SHA-1 algorithm. Enable this flag
by default when the DEVELOPER make flag is set so that contributors can
test this case adequately.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2020-02-22 20:17:30 +00:00 committed by Junio C Hamano
parent 61e2a70ff2
commit 9412759925
2 changed files with 6 additions and 0 deletions
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2
config.mak.dev
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@ -17,6 +17,8 @@ DEVELOPER_CFLAGS += -Wstrict-prototypes
DEVELOPER_CFLAGS += -Wunused
DEVELOPER_CFLAGS += -Wvla
DEVELOPER_CFLAGS += -DENABLE_SHA256
ifndef COMPILER_FEATURES
COMPILER_FEATURES := $(shell ./detect-compiler $(CC))
endif

4
repository.c
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@ -89,6 +89,10 @@ void repo_set_gitdir(struct repository *repo,
void repo_set_hash_algo(struct repository *repo, int hash_algo)
{
repo->hash_algo = &hash_algos[hash_algo];
#ifndef ENABLE_SHA256
if (hash_algo != GIT_HASH_SHA1)
die(_("The hash algorithm %s is not supported in this build."), repo->hash_algo->name);
#endif
}
/*