[PATCH v2 03/18] builtin rebase: support --rerere-autoupdate

[Pratik Karki via GitGitGadget]

From: Pratik Karki <predatoram...@gmail.com>

The `--rerere-autoupdate` option allows rerere to update the index with
resolved conflicts. This commit follows closely the equivalent part of
`git-legacy-rebase.sh`.

Signed-off-by: Pratik Karki <predatoram...@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
 builtin/rebase.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/builtin/rebase.c b/builtin/rebase.c
index a491481120..1729d2d9e2 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -94,6 +94,7 @@ struct rebase_options {
        struct strbuf git_am_opt;
        const char *action;
        int signoff;
+       int allow_rerere_autoupdate;
 };
 
 static int is_interactive(struct rebase_options *opts)
@@ -174,6 +175,21 @@ static int read_basic_state(struct rebase_options *opts)
                opts->flags |= REBASE_FORCE;
        }
 
+       if (file_exists(state_dir_path("allow_rerere_autoupdate", opts))) {
+               strbuf_reset(&buf);
+               if (read_one(state_dir_path("allow_rerere_autoupdate", opts),
+                           &buf))
+                       return -1;
+               if (!strcmp(buf.buf, "--rerere-autoupdate"))
+                       opts->allow_rerere_autoupdate = 1;
+               else if (!strcmp(buf.buf, "--no-rerere-autoupdate"))
+                       opts->allow_rerere_autoupdate = 0;
+               else
+                       warning(_("ignoring invalid allow_rerere_autoupdate: "
+                                 "'%s'"), buf.buf);
+       } else
+               opts->allow_rerere_autoupdate = -1;
+
        strbuf_release(&buf);
 
        return 0;
@@ -256,6 +272,10 @@ static int run_specific_rebase(struct rebase_options *opts)
                add_var(&script_snippet, "switch_to", opts->switch_to);
        add_var(&script_snippet, "action", opts->action ? opts->action : "");
        add_var(&script_snippet, "signoff", opts->signoff ? "--signoff" : "");
+       add_var(&script_snippet, "allow_rerere_autoupdate",
+               opts->allow_rerere_autoupdate < 0 ? "" :
+               opts->allow_rerere_autoupdate ?
+               "--rerere-autoupdate" : "--no-rerere-autoupdate");
 
        switch (opts->type) {
        case REBASE_AM:
@@ -488,6 +508,7 @@ int cmd_rebase(int argc, const char **argv, const char 
*prefix)
                .type = REBASE_UNSPECIFIED,
                .flags = REBASE_NO_QUIET,
                .git_am_opt = STRBUF_INIT,
+               .allow_rerere_autoupdate  = -1,
        };
        const char *branch_name;
        int ret, flags, total_argc, in_progress = 0;
@@ -553,6 +574,10 @@ int cmd_rebase(int argc, const char **argv, const char 
*prefix)
                OPT_SET_INT('p', "preserve-merges", &options.type,
                            N_("try to recreate merges instead of ignoring "
                               "them"), REBASE_PRESERVE_MERGES),
+               OPT_BOOL(0, "rerere-autoupdate",
+                        &options.allow_rerere_autoupdate,
+                        N_("allow rerere to update index  with resolved "
+                           "conflict")),
                OPT_END(),
        };
 
-- 
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