format-patch: introduce format.useAutoBase configuration

This allows to record the base commit automatically, it is equivalent
to set --base=auto in cmdline.

The format.useAutoBase has lower priority than command line option,
so if user set format.useAutoBase and pass the command line option in
the meantime, base_commit will be the one passed to command line
option.

Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 2cd6bdd7d2bc2816c1a9aed1c6a26bbd3285777c..fb31ae5b3ccf8139e510247b9af6adcde51a38eb 100644 (file)
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1258,6 +1258,10 @@ format.outputDirectory::
        Set a custom directory to store the resulting files instead of the
        current working directory.
 
+format.useAutoBase::
+       A boolean value which lets you enable the `--base=auto` option of
+       format-patch by default.
+
 filter.<driver>.clean::
        The command which is used to convert the content of a worktree
        file to a blob upon checkin.  See linkgit:gitattributes[5] for

diff --git a/builtin/log.c b/builtin/log.c
index 9033bc7c54619bd6c59521b8f39f30e6b2333887..acfcc05b77d56e84f176d8be8d79984a66a93255 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -696,6 +696,7 @@ static void add_header(const char *value)
 #define THREAD_DEEP 2
 static int thread;
 static int do_signoff;
+static int base_auto;
 static const char *signature = git_version_string;
 static const char *signature_file;
 static int config_cover_letter;
@@ -780,6 +781,10 @@ static int git_format_config(const char *var, const char *value, void *cb)
        }
        if (!strcmp(var, "format.outputdirectory"))
                return git_config_string(&config_output_directory, var, value);
+       if (!strcmp(var, "format.useautobase")) {
+               base_auto = git_config_bool(var, value);
+               return 0;
+       }
 
        return git_log_config(var, value, cb);
 }
@@ -1199,7 +1204,11 @@ static struct commit *get_base_commit(const char *base_commit,
        struct commit **rev;
        int i = 0, rev_nr = 0;
 
-       if (!strcmp(base_commit, "auto")) {
+       if (base_commit && strcmp(base_commit, "auto")) {
+               base = lookup_commit_reference_by_name(base_commit);
+               if (!base)
+                       die(_("Unknown commit %s"), base_commit);
+       } else if ((base_commit && !strcmp(base_commit, "auto")) || base_auto) {
                struct branch *curr_branch = branch_get(NULL);
                const char *upstream = branch_get_upstream(curr_branch, NULL);
                if (upstream) {
@@ -1221,10 +1230,6 @@ static struct commit *get_base_commit(const char *base_commit,
                              "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);
@@ -1662,7 +1667,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
        }
 
        memset(&bases, 0, sizeof(bases));
-       if (base_commit) {
+       if (base_commit || base_auto) {
                struct commit *base = get_base_commit(base_commit, list, nr);
                reset_revision_walk();
                prepare_bases(&bases, base, list, nr);

diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 1bfd868f6d2902dd501f7bca210fd00a7fc9174a..ab98cefe09078d91814c85074e4162bfb53b01ad 100755 (executable)
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -1546,4 +1546,23 @@ test_expect_success 'format-patch errors out when history involves criss-cross'
        test_must_fail  git format-patch --base=auto -1
 '
 
+test_expect_success 'format-patch format.useAutoBaseoption' '
+       test_when_finished "git config --unset format.useAutoBase" &&
+       git checkout local &&
+       git config format.useAutoBase true &&
+       git format-patch --stdout -1 >patch &&
+       grep "^base-commit:" patch >actual &&
+       echo "base-commit: $(git rev-parse upstream)" >expected &&
+       test_cmp expected actual
+'
+
+test_expect_success 'format-patch --base overrides format.useAutoBase' '
+       test_when_finished "git config --unset format.useAutoBase" &&
+       git config format.useAutoBase true &&
+       git format-patch --stdout --base=HEAD~1 -1 >patch &&
+       grep "^base-commit:" patch >actual &&
+       echo "base-commit: $(git rev-parse HEAD~1)" >expected &&
+       test_cmp expected actual
+'
+
 test_done