am: add --show-current-patch

Pointing the user to $GIT_DIR/rebase-apply may encourage them to mess
around in there, which is not a good thing. With this, the user does
not have to keep the path around somewhere (because after a couple of
commands, the path may be out of scrollback buffer) when they need to
look at the patch.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index 12879e4029a7710e2d78bae476f7ad7d9b0fe830..0f426ae8749c31efc98af8d155a60358705d4c3a 100644 (file)
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -16,7 +16,7 @@ SYNOPSIS
         [--exclude=<path>] [--include=<path>] [--reject] [-q | --quiet]
         [--[no-]scissors] [-S[<keyid>]] [--patch-format=<format>]
         [(<mbox> | <Maildir>)...]
-'git am' (--continue | --skip | --abort)
+'git am' (--continue | --skip | --abort | --show-current-patch)
 
 DESCRIPTION
 -----------
@@ -167,6 +167,10 @@ default.   You can use `--no-utf8` to override this.
 --abort::
        Restore the original branch and abort the patching operation.
 
+--show-current-patch::
+       Show the patch being applied when "git am" is stopped because
+       of conflicts.
+
 DISCUSSION
 ----------
 

diff --git a/builtin/am.c b/builtin/am.c
index acfe9d3c8cd6dbd8362c17d55dc036ce6682ce8a..07abfb8f832a98476ec177655678f244e9f67c32 100644 (file)
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1831,8 +1831,7 @@ static void am_run(struct am_state *state, int resume)
                        git_config_get_bool("advice.amworkdir", &advice_amworkdir);
 
                        if (advice_amworkdir)
-                               printf_ln(_("The copy of the patch that failed is found in: %s"),
-                                               am_path(state, "patch"));
+                               printf_ln(_("Use 'git am --show-current-patch' to see the failed patch"));
 
                        die_user_resolve(state);
                }
@@ -2121,6 +2120,23 @@ static void am_abort(struct am_state *state)
        am_destroy(state);
 }
 
+static int show_patch(struct am_state *state)
+{
+       struct strbuf sb = STRBUF_INIT;
+       const char *patch_path;
+       int len;
+
+       patch_path = am_path(state, msgnum(state));
+       len = strbuf_read_file(&sb, patch_path, 0);
+       if (len < 0)
+               die_errno(_("failed to read '%s'"), patch_path);
+
+       setup_pager();
+       write_in_full(1, sb.buf, sb.len);
+       strbuf_release(&sb);
+       return 0;
+}
+
 /**
  * parse_options() callback that validates and sets opt->value to the
  * PATCH_FORMAT_* enum value corresponding to `arg`.
@@ -2149,7 +2165,8 @@ enum resume_mode {
        RESUME_APPLY,
        RESUME_RESOLVED,
        RESUME_SKIP,
-       RESUME_ABORT
+       RESUME_ABORT,
+       RESUME_SHOW_PATCH
 };
 
 static int git_am_config(const char *k, const char *v, void *cb)
@@ -2171,6 +2188,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
        int patch_format = PATCH_FORMAT_UNKNOWN;
        enum resume_mode resume = RESUME_FALSE;
        int in_progress;
+       int ret = 0;
 
        const char * const usage[] = {
                N_("git am [<options>] [(<mbox> | <Maildir>)...]"),
@@ -2249,6 +2267,9 @@ int cmd_am(int argc, const char **argv, const char *prefix)
                OPT_CMDMODE(0, "abort", &resume,
                        N_("restore the original branch and abort the patching operation."),
                        RESUME_ABORT),
+               OPT_CMDMODE(0, "show-current-patch", &resume,
+                       N_("show the patch being applied."),
+                       RESUME_SHOW_PATCH),
                OPT_BOOL(0, "committer-date-is-author-date",
                        &state.committer_date_is_author_date,
                        N_("lie about committer date")),
@@ -2359,11 +2380,14 @@ int cmd_am(int argc, const char **argv, const char *prefix)
        case RESUME_ABORT:
                am_abort(&state);
                break;
+       case RESUME_SHOW_PATCH:
+               ret = show_patch(&state);
+               break;
        default:
                die("BUG: invalid resume value");
        }
 
        am_state_release(&state);
 
-       return 0;
+       return ret;
 }

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 3683c772c5586ccc1f6dfc8c047919d8d96aa891..56ca445fa83b1e4a1aefbe5e6fe529a1fa6f7df4 100644 (file)
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1077,7 +1077,7 @@ _git_am ()
 {
        __git_find_repo_path
        if [ -d "$__git_repo_path"/rebase-apply ]; then
-               __gitcomp "--skip --continue --resolved --abort"
+               __gitcomp "--skip --continue --resolved --abort --show-current-patch"
                return
        fi
        case "$cur" in

diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index 73b67b4280b99e0328e201e6b69c3d88b766ea84..23abf42abcf1851a7921d034629a55efb319893a 100755 (executable)
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -662,6 +662,11 @@ test_expect_success 'am pauses on conflict' '
        test -d .git/rebase-apply
 '
 
+test_expect_success 'am --show-current-patch' '
+       git am --show-current-patch >actual.patch &&
+       test_cmp .git/rebase-apply/0001 actual.patch
+'
+
 test_expect_success 'am --skip works' '
        echo goodbye >expected &&
        git am --skip &&