diff options
| -rw-r--r-- | builtin/name-rev.c | 15 | ||||
| -rw-r--r-- | git-compat-util.h | 1 | ||||
| -rwxr-xr-x | t/t6120-describe.sh | 15 |
3 files changed, 28 insertions, 3 deletions
diff --git a/builtin/name-rev.c b/builtin/name-rev.c index c785fe16ba..b0f0776947 100644 --- a/builtin/name-rev.c +++ b/builtin/name-rev.c @@ -9,7 +9,11 @@ #include "sha1-lookup.h" #include "commit-slab.h" -#define CUTOFF_DATE_SLOP 86400 /* one day */ +/* + * One day. See the 'name a rev shortly after epoch' test in t6120 when + * changing this value + */ +#define CUTOFF_DATE_SLOP 86400 typedef struct rev_name { const char *tip_name; @@ -481,8 +485,13 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix) add_object_array(object, *argv, &revs); } - if (cutoff) - cutoff = cutoff - CUTOFF_DATE_SLOP; + if (cutoff) { + /* check for undeflow */ + if (cutoff > TIME_MIN + CUTOFF_DATE_SLOP) + cutoff = cutoff - CUTOFF_DATE_SLOP; + else + cutoff = TIME_MIN; + } for_each_ref(name_ref, &data); if (transform_stdin) { diff --git a/git-compat-util.h b/git-compat-util.h index f0d13e4e28..d2e884e46a 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -344,6 +344,7 @@ typedef uintmax_t timestamp_t; #define PRItime PRIuMAX #define parse_timestamp strtoumax #define TIME_MAX UINTMAX_MAX +#define TIME_MIN 0 #ifndef PATH_SEP #define PATH_SEP ':' diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh index 2b883d8174..45047d0a72 100755 --- a/t/t6120-describe.sh +++ b/t/t6120-describe.sh @@ -424,4 +424,19 @@ test_expect_success 'describe complains about missing object' ' test_must_fail git describe $ZERO_OID ' +test_expect_success 'name-rev a rev shortly after epoch' ' + test_when_finished "git checkout master" && + + git checkout --orphan no-timestamp-underflow && + # Any date closer to epoch than the CUTOFF_DATE_SLOP constant + # in builtin/name-rev.c. + GIT_COMMITTER_DATE="@1234 +0000" \ + git commit -m "committer date shortly after epoch" && + old_commit_oid=$(git rev-parse HEAD) && + + echo "$old_commit_oid no-timestamp-underflow" >expect && + git name-rev $old_commit_oid >actual && + test_cmp expect actual +' + test_done |