sequencer: update reading author-script

Rather than abusing a strbuf to come up with an environment block,
let's just use the argv_array structure which serves the same
purpose much better.

While at it, rename the function to reflect the fact that it does
not really care exactly what environment variables are defined in
said file.

Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sequencer.c b/sequencer.c
index 41f80ea2c42095684978854daa061be087d6d1bb..7acd0bd1b895096f5cf7f8a67ff2e67b740a3a79 100644 (file)
--- a/sequencer.c
+++ b/sequencer.c
@@ -544,18 +544,17 @@ static int write_author_script(const char *message)
 }
 
 /*
- * Read the author-script file into an environment block, ready for use in
- * run_command(), that can be free()d afterwards.
+ * Read a list of environment variable assignments (such as the author-script
+ * file) into an environment block. Returns -1 on error, 0 otherwise.
  */
-static char **read_author_script(void)
+static int read_env_script(struct argv_array *env)
 {
        struct strbuf script = STRBUF_INIT;
        int i, count = 0;
-       char *p, *p2, **env;
-       size_t env_size;
+       char *p, *p2;
 
        if (strbuf_read_file(&script, rebase_path_author_script(), 256) <= 0)
-               return NULL;
+               return -1;
 
        for (p = script.buf; *p; p++)
                if (skip_prefix(p, "'\\\\''", (const char **)&p2))
@@ -567,19 +566,12 @@ static char **read_author_script(void)
                        count++;
                }
 
-       env_size = (count + 1) * sizeof(*env);
-       strbuf_grow(&script, env_size);
-       memmove(script.buf + env_size, script.buf, script.len);
-       p = script.buf + env_size;
-       env = (char **)strbuf_detach(&script, NULL);
-
-       for (i = 0; i < count; i++) {
-               env[i] = p;
+       for (i = 0, p = script.buf; i < count; i++) {
+               argv_array_push(env, p);
                p += strlen(p) + 1;
        }
-       env[count] = NULL;
 
-       return env;
+       return 0;
 }
 
 static const char staged_changes_advice[] =
@@ -612,14 +604,12 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
                          int allow_empty, int edit, int amend,
                          int cleanup_commit_message)
 {
-       char **env = NULL;
-       struct argv_array array;
+       struct argv_array env = ARGV_ARRAY_INIT, array;
        int rc;
        const char *value;
 
        if (is_rebase_i(opts)) {
-               env = read_author_script();
-               if (!env) {
+               if (!read_env_script(&env)) {
                        const char *gpg_opt = gpg_sign_opt_quoted(opts);
 
                        return error(_(staged_changes_advice),
@@ -655,9 +645,9 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
                argv_array_push(&array, "--allow-empty-message");
 
        rc = run_command_v_opt_cd_env(array.argv, RUN_GIT_CMD, NULL,
-                       (const char *const *)env);
+                       (const char *const *)env.argv);
        argv_array_clear(&array);
-       free(env);
+       argv_array_clear(&env);
 
        return rc;
 }

diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index c896a4c1067fc80378130a09705bef58370f01be..e2f18d11f66afe19bf28b8218042a06f452f0aa1 100755 (executable)
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -237,6 +237,22 @@ test_expect_success 'retain authorship' '
        git show HEAD | grep "^Author: Twerp Snog"
 '
 
+test_expect_success 'retain authorship w/ conflicts' '
+       git reset --hard twerp &&
+       test_commit a conflict a conflict-a &&
+       git reset --hard twerp &&
+       GIT_AUTHOR_NAME=AttributeMe \
+       test_commit b conflict b conflict-b &&
+       set_fake_editor &&
+       test_must_fail git rebase -i conflict-a &&
+       echo resolved >conflict &&
+       git add conflict &&
+       git rebase --continue &&
+       test $(git rev-parse conflict-a^0) = $(git rev-parse HEAD^) &&
+       git show >out &&
+       grep AttributeMe out
+'
+
 test_expect_success 'squash' '
        git reset --hard twerp &&
        echo B > file7 &&