reftable: add dump utility
provide a command-line utility for inspecting individual tables, and inspecting a complete ref database Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Helped-by: Carlo Marcelo Arenas Belón <carenas@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Han-Wen Nienhuys committed
Oct 7, 2021 at 20:25 UTC
e7931683645f65e8e483bdc3dabbf94ddf799cd7
1 file changed
+107
reftable/dump.c
new
+107
@@ -0,0 +1,107 @@
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+/*
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+Copyright 2020 Google LLC
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+
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+Use of this source code is governed by a BSD-style
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+license that can be found in the LICENSE file or at
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+https://developers.google.com/open-source/licenses/bsd
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+*/
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+
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+#include "git-compat-util.h"
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+#include "hash.h"
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+
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+#include "reftable-blocksource.h"
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+#include "reftable-error.h"
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+#include "reftable-merged.h"
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+#include "reftable-record.h"
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+#include "reftable-tests.h"
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+#include "reftable-writer.h"
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+#include "reftable-iterator.h"
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+#include "reftable-reader.h"
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+#include "reftable-stack.h"
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+#include "reftable-generic.h"
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+
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+#include <stddef.h>
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <unistd.h>
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+#include <string.h>
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+
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+static int compact_stack(const char *stackdir)
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+{
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+ struct reftable_stack *stack = NULL;
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+ struct reftable_write_options cfg = { 0 };
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+
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+ int err = reftable_new_stack(&stack, stackdir, cfg);
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+ if (err < 0)
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+ goto done;
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+
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+ err = reftable_stack_compact_all(stack, NULL);
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+ if (err < 0)
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+ goto done;
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+done:
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+ if (stack) {
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+ reftable_stack_destroy(stack);
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+ }
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+ return err;
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+}
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+
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+static void print_help(void)
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+{
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+ printf("usage: dump [-cst] arg\n\n"
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+ "options: \n"
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+ " -c compact\n"
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+ " -t dump table\n"
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+ " -s dump stack\n"
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+ " -6 sha256 hash format\n"
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+ " -h this help\n"
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+ "\n");
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+}
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+
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+int reftable_dump_main(int argc, char *const *argv)
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+{
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+ int err = 0;
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+ int opt_dump_table = 0;
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+ int opt_dump_stack = 0;
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+ int opt_compact = 0;
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+ uint32_t opt_hash_id = GIT_SHA1_FORMAT_ID;
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+ const char *arg = NULL, *argv0 = argv[0];
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+
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+ for (; argc > 1; argv++, argc--)
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+ if (*argv[1] != '-')
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+ break;
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+ else if (!strcmp("-t", argv[1]))
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+ opt_dump_table = 1;
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+ else if (!strcmp("-6", argv[1]))
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+ opt_hash_id = GIT_SHA256_FORMAT_ID;
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+ else if (!strcmp("-s", argv[1]))
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+ opt_dump_stack = 1;
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+ else if (!strcmp("-c", argv[1]))
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+ opt_compact = 1;
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+ else if (!strcmp("-?", argv[1]) || !strcmp("-h", argv[1])) {
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+ print_help();
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+ return 2;
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+ }
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+
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+ if (argc != 2) {
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+ fprintf(stderr, "need argument\n");
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+ print_help();
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+ return 2;
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+ }
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+
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+ arg = argv[1];
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+
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+ if (opt_dump_table) {
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+ err = reftable_reader_print_file(arg);
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+ } else if (opt_dump_stack) {
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+ err = reftable_stack_print_directory(arg, opt_hash_id);
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+ } else if (opt_compact) {
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+ err = compact_stack(arg);
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+ }
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+
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+ if (err < 0) {
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+ fprintf(stderr, "%s: %s: %s\n", argv0, arg,
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+ reftable_error_str(err));
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+ return 1;
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+ }
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+ return 0;
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+}