[GSoC][PATCH v6 16/20] rebase -i: rewrite init_basic_state() in C

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This rewrites init_basic_state() from shell to C.  The call to
write_basic_state() in cmd_rebase__helper() is replaced by a call to the
new function.

The shell version is then stripped from git-rebase--interactive.sh.

Signed-off-by: Alban Gruin <alban.gruin@xxxxxxxxx>
---
No changes since v5.

 builtin/rebase--helper.c   | 23 ++++++++++++++++++++++-
 git-rebase--interactive.sh |  9 ---------
 2 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/builtin/rebase--helper.c b/builtin/rebase--helper.c
index 63c5086e42..f8128037d3 100644
--- a/builtin/rebase--helper.c
+++ b/builtin/rebase--helper.c
@@ -5,10 +5,13 @@
 #include "sequencer.h"
 #include "rebase-interactive.h"
 #include "argv-array.h"
+#include "refs.h"
 #include "rerere.h"
 #include "alias.h"
 
+static GIT_PATH_FUNC(path_state_dir, "rebase-merge/")
 static GIT_PATH_FUNC(path_squash_onto, "rebase-merge/squash-onto")
+static GIT_PATH_FUNC(path_interactive, "rebase-merge/interactive")
 
 static int get_revision_ranges(const char *upstream, const char *onto,
 			       const char **head_hash,
@@ -44,6 +47,24 @@ static int get_revision_ranges(const char *upstream, const char *onto,
 	return 0;
 }
 
+static int init_basic_state(struct replay_opts *opts, const char *head_name,
+			    const char *onto, const char *orig_head)
+{
+	FILE *interactive;
+
+	if (!is_directory(path_state_dir()) && mkdir_in_gitdir(path_state_dir()))
+		return error_errno(_("could not create temporary %s"), path_state_dir());
+
+	delete_reflog("REBASE_HEAD");
+
+	interactive = fopen(path_interactive(), "w");
+	if (!interactive)
+		return error_errno(_("could not mark as interactive"));
+	fclose(interactive);
+
+	return write_basic_state(opts, head_name, onto, orig_head);
+}
+
 static const char * const builtin_rebase_helper_usage[] = {
 	N_("git rebase--helper [<options>]"),
 	NULL
@@ -198,7 +219,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
 		if (ret)
 			return ret;
 
-		return !!write_basic_state(&opts, head_name, onto, head_hash);
+		return !!init_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 6367da66e2..761be95ed1 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -51,14 +51,6 @@ initiate_action () {
 	esac
 }
 
-init_basic_state () {
-	orig_head=$(git rev-parse --verify HEAD) || die "$(gettext "No HEAD?")"
-	mkdir -p "$state_dir" || die "$(eval_gettext "Could not create temporary \$state_dir")"
-	rm -f "$(git rev-parse --git-path REBASE_HEAD)"
-
-	: > "$state_dir"/interactive || die "$(gettext "Could not mark as interactive")"
-}
-
 git_rebase__interactive () {
 	initiate_action "$action"
 	ret=$?
@@ -67,7 +59,6 @@ git_rebase__interactive () {
 	fi
 
 	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"} \
-- 
2.18.0




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