merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/t/helper/test-run-command.c

@@ -0,0 +1,97 @@
+/*
+ * test-run-command.c: test run command API.
+ *
+ * (C) 2009 Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "test-tool.h"
+#include "git-compat-util.h"
+#include "run-command.h"
+#include "argv-array.h"
+#include "strbuf.h"
+#include <string.h>
+#include <errno.h>
+
+static int number_callbacks;
+static int parallel_next(struct child_process *cp,
+			 struct strbuf *err,
+			 void *cb,
+			 void **task_cb)
+{
+	struct child_process *d = cb;
+	if (number_callbacks >= 4)
+		return 0;
+
+	argv_array_pushv(&cp->args, d->argv);
+	strbuf_addstr(err, "preloaded output of a child\n");
+	number_callbacks++;
+	return 1;
+}
+
+static int no_job(struct child_process *cp,
+		  struct strbuf *err,
+		  void *cb,
+		  void **task_cb)
+{
+	strbuf_addstr(err, "no further jobs available\n");
+	return 0;
+}
+
+static int task_finished(int result,
+			 struct strbuf *err,
+			 void *pp_cb,
+			 void *pp_task_cb)
+{
+	strbuf_addstr(err, "asking for a quick stop\n");
+	return 1;
+}
+
+int cmd__run_command(int argc, const char **argv)
+{
+	struct child_process proc = CHILD_PROCESS_INIT;
+	int jobs;
+
+	if (argc < 3)
+		return 1;
+	while (!strcmp(argv[1], "env")) {
+		if (!argv[2])
+			die("env specifier without a value");
+		argv_array_push(&proc.env_array, argv[2]);
+		argv += 2;
+		argc -= 2;
+	}
+	if (argc < 3)
+		return 1;
+	proc.argv = (const char **)argv + 2;
+
+	if (!strcmp(argv[1], "start-command-ENOENT")) {
+		if (start_command(&proc) < 0 && errno == ENOENT)
+			return 0;
+		fprintf(stderr, "FAIL %s\n", argv[1]);
+		return 1;
+	}
+	if (!strcmp(argv[1], "run-command"))
+		exit(run_command(&proc));
+
+	jobs = atoi(argv[2]);
+	proc.argv = (const char **)argv + 3;
+
+	if (!strcmp(argv[1], "run-command-parallel"))
+		exit(run_processes_parallel(jobs, parallel_next,
+					    NULL, NULL, &proc));
+
+	if (!strcmp(argv[1], "run-command-abort"))
+		exit(run_processes_parallel(jobs, parallel_next,
+					    NULL, task_finished, &proc));
+
+	if (!strcmp(argv[1], "run-command-no-jobs"))
+		exit(run_processes_parallel(jobs, no_job,
+					    NULL, task_finished, &proc));
+
+	fprintf(stderr, "check usage\n");
+	return 1;
+}