This rewrites write_basic_state() from git-rebase.sh in C.  This is the
first step in the conversion of init_basic_state(), hence the mode in
rebase--helper.c is called INIT_BASIC_STATE.  init_basic_state() will be
converted in the next commit.

The part of read_strategy_opts() that parses the stategy options is
moved to a new function to allow its use in rebase--helper.c.

Finally, the call to write_basic_state() is removed from
git-rebase--interactive.sh, replaced by a call to `--init-basic-state`.

Signed-off-by: Alban Gruin <alban.gr...@gmail.com>
---
No changes since v7.

 builtin/rebase--helper.c   | 28 +++++++++++++-
 git-rebase--interactive.sh |  7 +++-
 sequencer.c                | 77 ++++++++++++++++++++++++++++++++------
 sequencer.h                |  4 ++
 4 files changed, 102 insertions(+), 14 deletions(-)

diff --git a/builtin/rebase--helper.c b/builtin/rebase--helper.c
index 0716bbfd78..63c5086e42 100644
--- a/builtin/rebase--helper.c
+++ b/builtin/rebase--helper.c
@@ -5,6 +5,8 @@
 #include "sequencer.h"
 #include "rebase-interactive.h"
 #include "argv-array.h"
+#include "rerere.h"
+#include "alias.h"
 
 static GIT_PATH_FUNC(path_squash_onto, "rebase-merge/squash-onto")
 
@@ -53,11 +55,12 @@ int cmd_rebase__helper(int argc, const char **argv, const 
char *prefix)
        unsigned flags = 0, keep_empty = 0, rebase_merges = 0, autosquash = 0;
        int abbreviate_commands = 0, rebase_cousins = -1, ret;
        const char *head_hash = NULL, *onto = NULL, *restrict_revision = NULL,
-               *squash_onto = NULL, *upstream = NULL;
+               *squash_onto = NULL, *upstream = NULL, *head_name = NULL;
+       char *raw_strategies = NULL;
        enum {
                CONTINUE = 1, ABORT, MAKE_SCRIPT, SHORTEN_OIDS, EXPAND_OIDS,
                CHECK_TODO_LIST, REARRANGE_SQUASH, ADD_EXEC, EDIT_TODO, 
PREPARE_BRANCH,
-               COMPLETE_ACTION
+               COMPLETE_ACTION, INIT_BASIC_STATE
        } command = 0;
        struct option options[] = {
                OPT_BOOL(0, "ff", &opts.allow_ff, N_("allow fast-forward")),
@@ -69,6 +72,7 @@ int cmd_rebase__helper(int argc, const char **argv, const 
char *prefix)
                         N_("keep original branch points of cousins")),
                OPT_BOOL(0, "autosquash", &autosquash,
                         N_("move commits that begin with squash!/fixup!")),
+               OPT_BOOL(0, "signoff", &opts.signoff, N_("sign commits")),
                OPT__VERBOSE(&opts.verbose, N_("be verbose")),
                OPT_CMDMODE(0, "continue", &command, N_("continue rebase"),
                                CONTINUE),
@@ -93,6 +97,8 @@ int cmd_rebase__helper(int argc, const char **argv, const 
char *prefix)
                            N_("prepare the branch to be rebased"), 
PREPARE_BRANCH),
                OPT_CMDMODE(0, "complete-action", &command,
                            N_("complete the action"), COMPLETE_ACTION),
+               OPT_CMDMODE(0, "init-basic-state", &command,
+                           N_("initialise the rebase state"), 
INIT_BASIC_STATE),
                OPT_STRING(0, "onto", &onto, N_("onto"), N_("onto")),
                OPT_STRING(0, "restrict-revision", &restrict_revision,
                           N_("restrict-revision"), N_("restrict revision")),
@@ -100,6 +106,14 @@ int cmd_rebase__helper(int argc, const char **argv, const 
char *prefix)
                           N_("squash onto")),
                OPT_STRING(0, "upstream", &upstream, N_("upstream"),
                           N_("the upstream commit")),
+               OPT_STRING(0, "head-name", &head_name, N_("head-name"), 
N_("head name")),
+               OPT_STRING('S', "gpg-sign", &opts.gpg_sign, N_("gpg-sign"),
+                          N_("GPG-sign commits")),
+               OPT_STRING(0, "strategy", &opts.strategy, N_("strategy"),
+                          N_("rebase strategy")),
+               OPT_STRING(0, "strategy-opts", &raw_strategies, 
N_("strategy-opts"),
+                          N_("strategy options")),
+               OPT_RERERE_AUTOUPDATE(&opts.allow_rerere_auto),
                OPT_END()
        };
 
@@ -176,6 +190,16 @@ int cmd_rebase__helper(int argc, const char **argv, const 
char *prefix)
                free(shortrevisions);
                return !!ret;
        }
+       if (command == INIT_BASIC_STATE) {
+               if (raw_strategies)
+                       parse_strategy_opts(&opts, raw_strategies);
+
+               ret = get_revision_ranges(upstream, onto, &head_hash, NULL, 
NULL);
+               if (ret)
+                       return ret;
+
+               return !!write_basic_state(&opts, head_name, onto, head_hash);
+       }
 
        usage_with_options(builtin_rebase_helper_usage, options);
 }
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 08e9a21c2f..6367da66e2 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -57,7 +57,6 @@ init_basic_state () {
        rm -f "$(git rev-parse --git-path REBASE_HEAD)"
 
        : > "$state_dir"/interactive || die "$(gettext "Could not mark as 
interactive")"
-       write_basic_state
 }
 
 git_rebase__interactive () {
@@ -70,6 +69,12 @@ git_rebase__interactive () {
        git rebase--helper --prepare-branch "$switch_to" ${verbose:+--verbose}
        init_basic_state
 
+       git rebase--helper --init-basic-state ${upstream:+--upstream 
"$upstream"} \
+               ${onto:+--onto "$onto"} ${head_name:+--head-name "$head_name"} \
+               ${verbose:+--verbose} ${strategy:+--strategy "$strategy"} \
+               ${strategy_opts:+--strategy-opts="$strategy_opts"} \
+               "$allow_rerere_autoupdate" "$gpg_sign_opt" "$signoff" || exit
+
        git rebase--helper --make-script ${keep_empty:+--keep-empty} \
                ${rebase_merges:+--rebase-merges} \
                ${rebase_cousins:+--rebase-cousins} \
diff --git a/sequencer.c b/sequencer.c
index e3de1fbb2d..0a3292d5c4 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -145,7 +145,7 @@ static GIT_PATH_FUNC(rebase_path_refs_to_delete, 
"rebase-merge/refs-to-delete")
 
 /*
  * The following files are written by git-rebase just after parsing the
- * command-line (and are only consumed, not modified, by the sequencer).
+ * command-line.
  */
 static GIT_PATH_FUNC(rebase_path_gpg_sign_opt, "rebase-merge/gpg_sign_opt")
 static GIT_PATH_FUNC(rebase_path_orig_head, "rebase-merge/orig-head")
@@ -157,6 +157,7 @@ static GIT_PATH_FUNC(rebase_path_autostash, 
"rebase-merge/autostash")
 static GIT_PATH_FUNC(rebase_path_strategy, "rebase-merge/strategy")
 static GIT_PATH_FUNC(rebase_path_strategy_opts, "rebase-merge/strategy_opts")
 static GIT_PATH_FUNC(rebase_path_allow_rerere_autoupdate, 
"rebase-merge/allow_rerere_autoupdate")
+static GIT_PATH_FUNC(rebase_path_quiet, "rebase-merge/quiet")
 
 static int git_sequencer_config(const char *k, const char *v, void *cb)
 {
@@ -2247,21 +2248,14 @@ static int populate_opts_cb(const char *key, const char 
*value, void *data)
        return 0;
 }
 
-static void read_strategy_opts(struct replay_opts *opts, struct strbuf *buf)
+void parse_strategy_opts(struct replay_opts *opts, char *raw_opts)
 {
        int i;
-       char *strategy_opts_string;
+       char *strategy_opts_string = raw_opts;
 
-       strbuf_reset(buf);
-       if (!read_oneliner(buf, rebase_path_strategy(), 0))
-               return;
-       opts->strategy = strbuf_detach(buf, NULL);
-       if (!read_oneliner(buf, rebase_path_strategy_opts(), 0))
-               return;
-
-       strategy_opts_string = buf->buf;
        if (*strategy_opts_string == ' ')
                strategy_opts_string++;
+
        opts->xopts_nr = split_cmdline(strategy_opts_string,
                                       (const char ***)&opts->xopts);
        for (i = 0; i < opts->xopts_nr; i++) {
@@ -2272,6 +2266,18 @@ static void read_strategy_opts(struct replay_opts *opts, 
struct strbuf *buf)
        }
 }
 
+static void read_strategy_opts(struct replay_opts *opts, struct strbuf *buf)
+{
+       strbuf_reset(buf);
+       if (!read_oneliner(buf, rebase_path_strategy(), 0))
+               return;
+       opts->strategy = strbuf_detach(buf, NULL);
+       if (!read_oneliner(buf, rebase_path_strategy_opts(), 0))
+               return;
+
+       parse_strategy_opts(opts, buf->buf);
+}
+
 static int read_populate_opts(struct replay_opts *opts)
 {
        if (is_rebase_i(opts)) {
@@ -2339,6 +2345,55 @@ static int read_populate_opts(struct replay_opts *opts)
        return 0;
 }
 
+static void write_strategy_opts(struct replay_opts *opts)
+{
+       int i;
+       struct strbuf buf = STRBUF_INIT;
+
+       for (i = 0; i < opts->xopts_nr; ++i)
+               strbuf_addf(&buf, " --%s", opts->xopts[i]);
+
+       write_file(rebase_path_strategy_opts(), "%s\n", buf.buf);
+       strbuf_release(&buf);
+}
+
+int write_basic_state(struct replay_opts *opts, const char *head_name,
+                     const char *onto, const char *orig_head)
+{
+       const char *quiet = getenv("GIT_QUIET");
+
+       if (head_name)
+               write_file(rebase_path_head_name(), "%s\n", head_name);
+       if (onto)
+               write_file(rebase_path_onto(), "%s\n", onto);
+       if (orig_head)
+               write_file(rebase_path_orig_head(), "%s\n", orig_head);
+
+       if (quiet)
+               write_file(rebase_path_quiet(), "%s\n", quiet);
+       else
+               write_file(rebase_path_quiet(), "\n");
+
+       if (opts->verbose)
+               write_file(rebase_path_verbose(), "");
+       if (opts->strategy)
+               write_file(rebase_path_strategy(), "%s\n", opts->strategy);
+       if (opts->xopts_nr > 0)
+               write_strategy_opts(opts);
+
+       if (opts->allow_rerere_auto == RERERE_AUTOUPDATE)
+               write_file(rebase_path_allow_rerere_autoupdate(), 
"--rerere-autoupdate\n");
+       else if (opts->allow_rerere_auto == RERERE_NOAUTOUPDATE)
+               write_file(rebase_path_allow_rerere_autoupdate(), 
"--no-rerere-autoupdate\n");
+
+       if (opts->gpg_sign)
+               write_file(rebase_path_gpg_sign_opt(), "-S%s\n", 
opts->gpg_sign);
+       if (opts->signoff)
+               write_file(rebase_path_signoff(), "--signoff\n");
+
+       return 0;
+}
+
 static int walk_revs_populate_todo(struct todo_list *todo_list,
                                struct replay_opts *opts)
 {
diff --git a/sequencer.h b/sequencer.h
index 30bd9c12ac..660cff5050 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -131,3 +131,7 @@ int prepare_branch_to_be_rebased(struct replay_opts *opts, 
const char *commit);
 void print_commit_summary(const char *prefix, const struct object_id *oid,
                          unsigned int flags);
 #endif
+
+void parse_strategy_opts(struct replay_opts *opts, char *raw_opts);
+int write_basic_state(struct replay_opts *opts, const char *head_name,
+                     const char *onto, const char *orig_head);
-- 
2.19.0

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