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author | Junio C Hamano <gitster@pobox.com> | 2015-10-09 13:38:30 -0700 |
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committer | Junio C Hamano <gitster@pobox.com> | 2015-10-09 13:38:30 -0700 |
commit | c63d4b2fe86876cc210d8bf22bd84d617f7815b7 (patch) | |
tree | 05e8d7cbd26ae9998dfaaf47c9b7a20253d3f0d8 | |
parent | 22f698cb188243b313e024d618283e0293e37140 (diff) | |
download | git-jc/am-3-fallback-regression-fix.tar.gz |
am -3: do not let failed merge from completing the error codepathjc/am-3-fallback-regression-fix
When "am" was rewritten in C, the codepath for falling back to
three-way merge was mistakenly made to make an internal call to
merge-recursive, disabling the error reporting code for certain
types of errors merge-recursive detects and reports by calling
die().
This is a quick-fix for correctness. The ideal endgame would be to
replace run_command() in run_fallback_merge_recursive() with a
direct call after making sure that internal call to merge-recursive
does not die().
Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r-- | builtin/am.c | 49 |
1 files changed, 33 insertions, 16 deletions
diff --git a/builtin/am.c b/builtin/am.c index 4f77e07b95..c869796ea6 100644 --- a/builtin/am.c +++ b/builtin/am.c @@ -1590,16 +1590,44 @@ static int build_fake_ancestor(const struct am_state *state, const char *index_f } /** + * Do the three-way merge using fake ancestor, his tree constructed + * from the fake ancestor and the postimage of the patch, and our + * state. + */ +static int run_fallback_merge_recursive(const struct am_state *state, + unsigned char *orig_tree, + unsigned char *our_tree, + unsigned char *his_tree) +{ + struct child_process cp = CHILD_PROCESS_INIT; + int status; + + cp.git_cmd = 1; + + argv_array_pushf(&cp.env_array, "GITHEAD_%s=%.*s", + sha1_to_hex(his_tree), linelen(state->msg), state->msg); + if (state->quiet) + argv_array_push(&cp.env_array, "GIT_MERGE_VERBOSITY=0"); + + argv_array_push(&cp.args, "merge-recursive"); + argv_array_push(&cp.args, sha1_to_hex(orig_tree)); + argv_array_push(&cp.args, "--"); + argv_array_push(&cp.args, sha1_to_hex(our_tree)); + argv_array_push(&cp.args, sha1_to_hex(his_tree)); + + status = run_command(&cp) ? (-1) : 0; + discard_cache(); + read_cache(); + return status; +} + +/** * Attempt a threeway merge, using index_path as the temporary index. */ static int fall_back_threeway(const struct am_state *state, const char *index_path) { unsigned char orig_tree[GIT_SHA1_RAWSZ], his_tree[GIT_SHA1_RAWSZ], our_tree[GIT_SHA1_RAWSZ]; - const unsigned char *bases[1] = {orig_tree}; - struct merge_options o; - struct commit *result; - char *his_tree_name; if (get_sha1("HEAD", our_tree) < 0) hashcpy(our_tree, EMPTY_TREE_SHA1_BIN); @@ -1651,22 +1679,11 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa * changes. */ - init_merge_options(&o); - - o.branch1 = "HEAD"; - his_tree_name = xstrfmt("%.*s", linelen(state->msg), state->msg); - o.branch2 = his_tree_name; - - if (state->quiet) - o.verbosity = 0; - - if (merge_recursive_generic(&o, our_tree, his_tree, 1, bases, &result)) { + if (run_fallback_merge_recursive(state, orig_tree, our_tree, his_tree)) { rerere(state->allow_rerere_autoupdate); - free(his_tree_name); return error(_("Failed to merge in the changes.")); } - free(his_tree_name); return 0; } |