diff options
| -rw-r--r-- | Documentation/git-format-patch.txt | 6 | ||||
| -rw-r--r-- | builtin/log.c | 30 | ||||
| -rwxr-xr-x | t/t4014-format-patch.sh | 39 |
3 files changed, 72 insertions, 3 deletions
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt index 1d790f1af5..bdeecd59e0 100644 --- a/Documentation/git-format-patch.txt +++ b/Documentation/git-format-patch.txt @@ -575,6 +575,12 @@ You can also use `git format-patch --base=P -3 C` to generate patches for A, B and C, and the identifiers for P, X, Y, Z are appended at the end of the first message. +If set `--base=auto` in cmdline, it will track base commit automatically, +the base commit will be the merge base of tip commit of the remote-tracking +branch and revision-range specified in cmdline. +For a local branch, you need to track a remote branch by `git branch +--set-upstream-to` before using this option. + EXAMPLES -------- diff --git a/builtin/log.c b/builtin/log.c index c9ee333932..9033bc7c54 100644 --- a/builtin/log.c +++ b/builtin/log.c @@ -1199,9 +1199,33 @@ static struct commit *get_base_commit(const char *base_commit, struct commit **rev; int i = 0, rev_nr = 0; - base = lookup_commit_reference_by_name(base_commit); - if (!base) - die(_("Unknown commit %s"), base_commit); + if (!strcmp(base_commit, "auto")) { + struct branch *curr_branch = branch_get(NULL); + const char *upstream = branch_get_upstream(curr_branch, NULL); + if (upstream) { + struct commit_list *base_list; + struct commit *commit; + unsigned char sha1[20]; + + if (get_sha1(upstream, sha1)) + die(_("Failed to resolve '%s' as a valid ref."), upstream); + commit = lookup_commit_or_die(sha1, "upstream base"); + base_list = get_merge_bases_many(commit, total, list); + /* There should be one and only one merge base. */ + if (!base_list || base_list->next) + die(_("Could not find exact merge base.")); + base = base_list->item; + free_commit_list(base_list); + } else { + die(_("Failed to get upstream, if you want to record base commit automatically,\n" + "please use git branch --set-upstream-to to track a remote branch.\n" + "Or you could specify base commit by --base=<base-commit-id> manually.")); + } + } else { + base = lookup_commit_reference_by_name(base_commit); + if (!base) + die(_("Unknown commit %s"), base_commit); + } ALLOC_ARRAY(rev, total); for (i = 0; i < total; i++) diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh index edf07eefd4..1bfd868f6d 100755 --- a/t/t4014-format-patch.sh +++ b/t/t4014-format-patch.sh @@ -1507,4 +1507,43 @@ test_expect_success 'format-patch --base errors out when base commit is not ance test_cmp expected actual ' +test_expect_success 'format-patch --base=auto' ' + git checkout -b upstream master && + git checkout -b local upstream && + git branch --set-upstream-to=upstream && + test_commit N1 && + test_commit N2 && + git format-patch --stdout --base=auto -2 >patch && + grep "^base-commit:" patch >actual && + echo "base-commit: $(git rev-parse upstream)" >expected && + test_cmp expected actual +' + +test_expect_success 'format-patch errors out when history involves criss-cross' ' + # setup criss-cross history + # + # B---M1---D + # / \ / + # A X + # \ / \ + # C---M2---E + # + git checkout master && + test_commit A && + git checkout -b xb master && + test_commit B && + git checkout -b xc master && + test_commit C && + git checkout -b xbc xb -- && + git merge xc && + git checkout -b xcb xc -- && + git branch --set-upstream-to=xbc && + git merge xb && + git checkout xbc && + test_commit D && + git checkout xcb && + test_commit E && + test_must_fail git format-patch --base=auto -1 +' + test_done |