cli: add `index-pack` command

src/cli/cmd.h

@@ -30,5 +30,6 @@ extern int cmd_clone(int argc, char **argv);
 extern int cmd_config(int argc, char **argv);
 extern int cmd_hash_object(int argc, char **argv);
 extern int cmd_help(int argc, char **argv);
+extern int cmd_index_pack(int argc, char **argv);
 
 #endif /* CLI_cmd_h__ */

src/cli/cmd_index_pack.c

+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include <git2.h>
+#include "common.h"
+#include "cmd.h"
+#include "progress.h"
+
+#define COMMAND_NAME "index-pack"
+
+#define BUFFER_SIZE (1024 * 1024)
+
+static int show_help, verbose, read_stdin;
+static char *filename;
+static cli_progress progress = CLI_PROGRESS_INIT;
+
+static const cli_opt_spec opts[] = {
+	{ CLI_OPT_TYPE_SWITCH,    "help",     0, &show_help,   1,
+	  CLI_OPT_USAGE_HIDDEN | CLI_OPT_USAGE_STOP_PARSING, NULL,
+	  "display help about the " COMMAND_NAME " command" },
+
+	{ CLI_OPT_TYPE_SWITCH,    "verbose", 'v', &verbose,    1,
+	  CLI_OPT_USAGE_DEFAULT,   NULL,    "display progress output" },
+
+	{ CLI_OPT_TYPE_LITERAL },
+
+	{ CLI_OPT_TYPE_SWITCH,    "stdin",    0,   &read_stdin, 1,
+	  CLI_OPT_USAGE_REQUIRED,  NULL,     "read from stdin" },
+	{ CLI_OPT_TYPE_ARG,       "pack-file", 0,  &filename, 0,
+	  CLI_OPT_USAGE_CHOICE,   "pack-file", "packfile path" },
+
+	{ 0 },
+};
+
+static void print_help(void)
+{
+	cli_opt_usage_fprint(stdout, PROGRAM_NAME, COMMAND_NAME, opts);
+	printf("\n");
+
+	printf("Indexes a packfile and writes the index to disk.\n");
+	printf("\n");
+
+	printf("Options:\n");
+
+	cli_opt_help_fprint(stdout, opts);
+}
+
+int cmd_index_pack(int argc, char **argv)
+{
+	cli_opt invalid_opt;
+	git_indexer *idx = NULL;
+	git_indexer_options idx_opts = GIT_INDEXER_OPTIONS_INIT;
+	git_indexer_progress stats = {0};
+	char buf[BUFFER_SIZE];
+	ssize_t read_len;
+	int fd, ret;
+
+	if (cli_opt_parse(&invalid_opt, opts, argv + 1, argc - 1, CLI_OPT_PARSE_GNU))
+		return cli_opt_usage_error(COMMAND_NAME, opts, &invalid_opt);
+
+	if (show_help) {
+		print_help();
+		return 0;
+	}
+
+	if (verbose) {
+		idx_opts.progress_cb = cli_progress_indexer;
+		idx_opts.progress_cb_payload = &progress;
+	}
+
+	if (read_stdin) {
+		fd = fileno(stdin);
+	} else if ((fd = p_open(filename, O_RDONLY)) < 0) {
+		ret = cli_error_git();
+		goto done;
+	}
+
+#ifdef GIT_EXPERIMENTAL_SHA256
+	ret = git_indexer_new(&idx, ".", GIT_OID_SHA1, &idx_opts);
+#else
+	ret = git_indexer_new(&idx, ".", 0, NULL, &idx_opts);
+#endif
+
+	if (ret < 0) {
+		ret = cli_error_git();
+		goto done;
+	}
+
+	while ((read_len = p_read(fd, buf, sizeof(buf))) > 0) {
+		if (git_indexer_append(idx, buf, (size_t)read_len, &stats) < 0) {
+			ret = cli_error_git();
+			goto done;
+		}
+	}
+
+	if (!read_stdin)
+		p_close(fd);
+
+	if (git_indexer_commit(idx, &stats) < 0) {
+		ret = cli_error_git();
+		goto done;
+	}
+
+	cli_progress_finish(&progress);
+
+done:
+	cli_progress_dispose(&progress);
+	git_indexer_free(idx);
+	return ret;
+}

src/cli/main.c

@@ -37,6 +37,7 @@ const cli_cmd_spec cli_cmds[] = {
 	{ "config",      cmd_config,      "View or set configuration values " },
 	{ "hash-object", cmd_hash_object, "Hash a raw object and product its object ID" },
 	{ "help",        cmd_help,        "Display help information" },
+	{ "index-pack",  cmd_index_pack,  "Create an index for a packfile" },
 	{ NULL }
 };
 

src/cli/progress.c

@@ -242,7 +242,21 @@ static int fetch_receiving(
 		done ? ", done." : "");
 }
 
-static int fetch_resolving(
+static int indexer_indexing(
+	cli_progress *progress,
+	const git_indexer_progress *stats)
+{
+	bool done = (stats->received_objects == stats->total_objects);
+
+	return progress_printf(progress, false,
+		"Indexing objects: %3d%% (%d/%d)%s\r",
+		percent(stats->received_objects, stats->total_objects),
+		stats->received_objects,
+		stats->total_objects,
+		done ? ", done." : "");
+}
+
+static int indexer_resolving(
 	cli_progress *progress,
 	const git_indexer_progress *stats)
 {
@@ -283,7 +297,42 @@ int cli_progress_fetch_transfer(const git_indexer_progress *stats, void *payload
 		/* fall through */
 
 	case CLI_PROGRESS_RESOLVING:
-		error = fetch_resolving(progress, stats);
+		error = indexer_resolving(progress, stats);
+		break;
+
+	default:
+		/* should not be reached */
+		GIT_ASSERT(!"unexpected progress state");
+	}
+
+	return error;
+}
+
+int cli_progress_indexer(
+	const git_indexer_progress *stats,
+	void *payload)
+{
+	cli_progress *progress = (cli_progress *)payload;
+	int error = 0;
+
+	switch (progress->action) {
+	case CLI_PROGRESS_NONE:
+		progress->action = CLI_PROGRESS_INDEXING;
+		/* fall through */
+
+	case CLI_PROGRESS_INDEXING:
+		if ((error = indexer_indexing(progress, stats)) < 0)
+			break;
+
+		if (stats->indexed_deltas == stats->total_deltas)
+			break;
+
+		progress_complete(progress);
+		progress->action = CLI_PROGRESS_RESOLVING;
+		/* fall through */
+
+	case CLI_PROGRESS_RESOLVING:
+		error = indexer_resolving(progress, stats);
 		break;
 
 	default:

src/cli/progress.h

@@ -22,6 +22,7 @@
 typedef enum {
 	CLI_PROGRESS_NONE,
 	CLI_PROGRESS_RECEIVING,
+	CLI_PROGRESS_INDEXING,
 	CLI_PROGRESS_RESOLVING,
 	CLI_PROGRESS_CHECKING_OUT
 } cli_progress_t;
@@ -75,6 +76,17 @@ extern int cli_progress_fetch_transfer(
 	void *payload);
 
 /**
+ * Prints indexer progress to the console. Suitable for a
+ * `progress_cb` callback for `git_indexer_options`.
+ *
+ * @param stats The indexer stats
+ * @param payload A pointer to the cli_progress
+ */
+extern int cli_progress_indexer(
+	const git_indexer_progress *stats,
+	void *payload);
+
+/**
  * Prints checkout progress to the console.  Suitable for a
  * `progress_cb` callback for `git_checkout_options`.
  *