merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 50 insertions, 38 deletions

diff --git a/third_party/git/run-command.c b/third_party/git/run-command.c
index 3449db319b..2ee59acdc8 100644
--- a/third_party/git/run-command.c
+++ b/third_party/git/run-command.c
@@ -2,7 +2,7 @@
 #include "run-command.h"
 #include "exec-cmd.h"
 #include "sigchain.h"
-#include "argv-array.h"
+#include "strvec.h"
 #include "thread-utils.h"
 #include "strbuf.h"
 #include "string-list.h"
@@ -11,14 +11,14 @@
 void child_process_init(struct child_process *child)
 {
 	memset(child, 0, sizeof(*child));
-	argv_array_init(&child->args);
-	argv_array_init(&child->env_array);
+	strvec_init(&child->args);
+	strvec_init(&child->env_array);
 }
 
 void child_process_clear(struct child_process *child)
 {
-	argv_array_clear(&child->args);
-	argv_array_clear(&child->env_array);
+	strvec_clear(&child->args);
+	strvec_clear(&child->env_array);
 }
 
 struct child_to_clean {
@@ -213,8 +213,9 @@ static char *locate_in_PATH(const char *file)
 static int exists_in_PATH(const char *file)
 {
 	char *r = locate_in_PATH(file);
+	int found = r != NULL;
 	free(r);
-	return r != NULL;
+	return found;
 }
 
 int sane_execvp(const char *file, char * const argv[])
@@ -262,31 +263,31 @@ int sane_execvp(const char *file, char * const argv[])
 	return -1;
 }
 
-static const char **prepare_shell_cmd(struct argv_array *out, const char **argv)
+static const char **prepare_shell_cmd(struct strvec *out, const char **argv)
 {
 	if (!argv[0])
 		BUG("shell command is empty");
 
 	if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
 #ifndef GIT_WINDOWS_NATIVE
-		argv_array_push(out, SHELL_PATH);
+		strvec_push(out, SHELL_PATH);
 #else
-		argv_array_push(out, "sh");
+		strvec_push(out, "sh");
 #endif
-		argv_array_push(out, "-c");
+		strvec_push(out, "-c");
 
 		/*
 		 * If we have no extra arguments, we do not even need to
 		 * bother with the "$@" magic.
 		 */
 		if (!argv[1])
-			argv_array_push(out, argv[0]);
+			strvec_push(out, argv[0]);
 		else
-			argv_array_pushf(out, "%s \"$@\"", argv[0]);
+			strvec_pushf(out, "%s \"$@\"", argv[0]);
 	}
 
-	argv_array_pushv(out, argv);
-	return out->argv;
+	strvec_pushv(out, argv);
+	return out->v;
 }
 
 #ifndef GIT_WINDOWS_NATIVE
@@ -400,7 +401,7 @@ static void child_err_spew(struct child_process *cmd, struct child_err *cerr)
 	set_error_routine(old_errfn);
 }
 
-static int prepare_cmd(struct argv_array *out, const struct child_process *cmd)
+static int prepare_cmd(struct strvec *out, const struct child_process *cmd)
 {
 	if (!cmd->argv[0])
 		BUG("command is empty");
@@ -409,30 +410,29 @@ static int prepare_cmd(struct argv_array *out, const struct child_process *cmd)
 	 * Add SHELL_PATH so in the event exec fails with ENOEXEC we can
 	 * attempt to interpret the command with 'sh'.
 	 */
-	argv_array_push(out, SHELL_PATH);
+	strvec_push(out, SHELL_PATH);
 
 	if (cmd->git_cmd) {
-		argv_array_push(out, "git");
-		argv_array_pushv(out, cmd->argv);
+		prepare_git_cmd(out, cmd->argv);
 	} else if (cmd->use_shell) {
 		prepare_shell_cmd(out, cmd->argv);
 	} else {
-		argv_array_pushv(out, cmd->argv);
+		strvec_pushv(out, cmd->argv);
 	}
 
 	/*
-	 * If there are no '/' characters in the command then perform a path
-	 * lookup and use the resolved path as the command to exec.  If there
-	 * are '/' characters, we have exec attempt to invoke the command
-	 * directly.
+	 * If there are no dir separator characters in the command then perform
+	 * a path lookup and use the resolved path as the command to exec. If
+	 * there are dir separator characters, we have exec attempt to invoke
+	 * the command directly.
 	 */
-	if (!strchr(out->argv[1], '/')) {
-		char *program = locate_in_PATH(out->argv[1]);
+	if (!has_dir_sep(out->v[1])) {
+		char *program = locate_in_PATH(out->v[1]);
 		if (program) {
-			free((char *)out->argv[1]);
-			out->argv[1] = program;
+			free((char *)out->v[1]);
+			out->v[1] = program;
 		} else {
-			argv_array_clear(out);
+			strvec_clear(out);
 			errno = ENOENT;
 			return -1;
 		}
@@ -672,9 +672,9 @@ int start_command(struct child_process *cmd)
 	char *str;
 
 	if (!cmd->argv)
-		cmd->argv = cmd->args.argv;
+		cmd->argv = cmd->args.v;
 	if (!cmd->env)
-		cmd->env = cmd->env_array.argv;
+		cmd->env = cmd->env_array.v;
 
 	/*
 	 * In case of errors we must keep the promise to close FDs
@@ -742,7 +742,7 @@ fail_pipe:
 	int notify_pipe[2];
 	int null_fd = -1;
 	char **childenv;
-	struct argv_array argv = ARGV_ARRAY_INIT;
+	struct strvec argv = STRVEC_INIT;
 	struct child_err cerr;
 	struct atfork_state as;
 
@@ -846,10 +846,10 @@ fail_pipe:
 		 * be used in the event exec failed with ENOEXEC at which point
 		 * we will try to interpret the command using 'sh'.
 		 */
-		execve(argv.argv[1], (char *const *) argv.argv + 1,
+		execve(argv.v[1], (char *const *) argv.v + 1,
 		       (char *const *) childenv);
 		if (errno == ENOEXEC)
-			execve(argv.argv[0], (char *const *) argv.argv,
+			execve(argv.v[0], (char *const *) argv.v,
 			       (char *const *) childenv);
 
 		if (errno == ENOENT) {
@@ -888,7 +888,7 @@ fail_pipe:
 
 	if (null_fd >= 0)
 		close(null_fd);
-	argv_array_clear(&argv);
+	strvec_clear(&argv);
 	free(childenv);
 }
 end_of_spawn:
@@ -897,7 +897,7 @@ end_of_spawn:
 {
 	int fhin = 0, fhout = 1, fherr = 2;
 	const char **sargv = cmd->argv;
-	struct argv_array nargv = ARGV_ARRAY_INIT;
+	struct strvec nargv = STRVEC_INIT;
 
 	if (cmd->no_stdin)
 		fhin = open("/dev/null", O_RDWR);
@@ -935,7 +935,7 @@ end_of_spawn:
 	if (cmd->clean_on_exit && cmd->pid >= 0)
 		mark_child_for_cleanup(cmd->pid, cmd);
 
-	argv_array_clear(&nargv);
+	strvec_clear(&nargv);
 	cmd->argv = sargv;
 	if (fhin != 0)
 		close(fhin);
@@ -1039,6 +1039,7 @@ int run_command_v_opt_cd_env_tr2(const char **argv, int opt, const char *dir,
 	cmd.silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
 	cmd.use_shell = opt & RUN_USING_SHELL ? 1 : 0;
 	cmd.clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0;
+	cmd.wait_after_clean = opt & RUN_WAIT_AFTER_CLEAN ? 1 : 0;
 	cmd.dir = dir;
 	cmd.env = env;
 	cmd.trace2_child_class = tr2_class;
@@ -1351,9 +1352,9 @@ int run_hook_ve(const char *const *env, const char *name, va_list args)
 	if (!p)
 		return 0;
 
-	argv_array_push(&hook.args, p);
+	strvec_push(&hook.args, p);
 	while ((p = va_arg(args, const char *)))
-		argv_array_push(&hook.args, p);
+		strvec_push(&hook.args, p);
 	hook.env = env;
 	hook.no_stdin = 1;
 	hook.stdout_to_stderr = 1;
@@ -1864,3 +1865,14 @@ int run_processes_parallel_tr2(int n, get_next_task_fn get_next_task,
 
 	return result;
 }
+
+int run_auto_maintenance(int quiet)
+{
+	struct child_process maint = CHILD_PROCESS_INIT;
+
+	maint.git_cmd = 1;
+	strvec_pushl(&maint.args, "maintenance", "run", "--auto", NULL);
+	strvec_push(&maint.args, quiet ? "--quiet" : "--no-quiet");
+
+	return run_command(&maint);
+}