rev-list: check reflog_info before showing usage
When git-rev-list sees no pending commits, it shows a usage message. This works even when reflog-walking is requested, because the reflog-walk code currently puts the reflog tips into the pending queue. In preparation for refactoring the reflog-walk code, let's explicitly check whether we have any reflogs to walk. For now this is a noop, but the existing reflog tests will make sure that it kicks in after the refactoring. Likewise, we'll add a test that "rev-list -g" without specifying any reflogs continues to fail (so that we know our check does not kick in too aggressively). Note that the implementation needs to go into its own sub-function, as the walk code does not expose its innards outside of reflog-walk.c. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -11,6 +11,7 @@
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#include "graph.h"
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#include "bisect.h"
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#include "progress.h"
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#include "reflog-walk.h"
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static const char rev_list_usage[] =
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"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
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@ -348,7 +349,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
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/* Only --header was specified */
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revs.commit_format = CMIT_FMT_RAW;
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if ((!revs.commits &&
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if ((!revs.commits && reflog_walk_empty(revs.reflog_info) &&
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(!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
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!revs.pending.nr)) ||
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revs.diff)
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@ -365,3 +365,8 @@ void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
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strbuf_release(&selector);
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}
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}
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int reflog_walk_empty(struct reflog_walk_info *info)
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{
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return !info || !info->reflogs.nr;
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}
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@ -20,4 +20,6 @@ extern void get_reflog_selector(struct strbuf *sb,
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const struct date_mode *dmode, int force_date,
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int shorten);
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extern int reflog_walk_empty(struct reflog_walk_info *walk);
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#endif
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@ -102,4 +102,8 @@ test_expect_failure 'walk prefers reflog to ref tip' '
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test_cmp expect actual
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'
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test_expect_success 'rev-list -g complains when there are no reflogs' '
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test_must_fail git rev-list -g
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'
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test_done
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