From c8bae7493d2f2910b57f13ded012e86bdcfb0532 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:47:53 +0200 Subject: Adding upstream version 1:2.39.2. Signed-off-by: Daniel Baumann --- builtin/hash-object.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 builtin/hash-object.c (limited to 'builtin/hash-object.c') diff --git a/builtin/hash-object.c b/builtin/hash-object.c new file mode 100644 index 0000000..b506381 --- /dev/null +++ b/builtin/hash-object.c @@ -0,0 +1,166 @@ +/* + * GIT - The information manager from hell + * + * Copyright (C) Linus Torvalds, 2005 + * Copyright (C) Junio C Hamano, 2005 + */ +#include "builtin.h" +#include "config.h" +#include "object-store.h" +#include "blob.h" +#include "quote.h" +#include "parse-options.h" +#include "exec-cmd.h" + +/* + * This is to create corrupt objects for debugging and as such it + * needs to bypass the data conversion performed by, and the type + * limitation imposed by, index_fd() and its callees. + */ +static int hash_literally(struct object_id *oid, int fd, const char *type, unsigned flags) +{ + struct strbuf buf = STRBUF_INIT; + int ret; + + if (strbuf_read(&buf, fd, 4096) < 0) + ret = -1; + else + ret = write_object_file_literally(buf.buf, buf.len, type, oid, + flags); + strbuf_release(&buf); + return ret; +} + +static void hash_fd(int fd, const char *type, const char *path, unsigned flags, + int literally) +{ + struct stat st; + struct object_id oid; + + if (fstat(fd, &st) < 0 || + (literally + ? hash_literally(&oid, fd, type, flags) + : index_fd(the_repository->index, &oid, fd, &st, + type_from_string(type), path, flags))) + die((flags & HASH_WRITE_OBJECT) + ? "Unable to add %s to database" + : "Unable to hash %s", path); + printf("%s\n", oid_to_hex(&oid)); + maybe_flush_or_die(stdout, "hash to stdout"); +} + +static void hash_object(const char *path, const char *type, const char *vpath, + unsigned flags, int literally) +{ + int fd; + fd = xopen(path, O_RDONLY); + hash_fd(fd, type, vpath, flags, literally); +} + +static void hash_stdin_paths(const char *type, int no_filters, unsigned flags, + int literally) +{ + struct strbuf buf = STRBUF_INIT; + struct strbuf unquoted = STRBUF_INIT; + + while (strbuf_getline(&buf, stdin) != EOF) { + if (buf.buf[0] == '"') { + strbuf_reset(&unquoted); + if (unquote_c_style(&unquoted, buf.buf, NULL)) + die("line is badly quoted"); + strbuf_swap(&buf, &unquoted); + } + hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags, + literally); + } + strbuf_release(&buf); + strbuf_release(&unquoted); +} + +int cmd_hash_object(int argc, const char **argv, const char *prefix) +{ + static const char * const hash_object_usage[] = { + N_("git hash-object [-t ] [-w] [--path= | --no-filters]\n" + " [--stdin [--literally]] [--] ..."), + N_("git hash-object [-t ] [-w] --stdin-paths [--no-filters]"), + NULL + }; + const char *type = blob_type; + int hashstdin = 0; + int stdin_paths = 0; + int no_filters = 0; + int literally = 0; + int nongit = 0; + unsigned flags = HASH_FORMAT_CHECK; + const char *vpath = NULL; + char *vpath_free = NULL; + const struct option hash_object_options[] = { + OPT_STRING('t', NULL, &type, N_("type"), N_("object type")), + OPT_BIT('w', NULL, &flags, N_("write the object into the object database"), + HASH_WRITE_OBJECT), + OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")), + OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")), + OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")), + OPT_BOOL( 0, "literally", &literally, N_("just hash any random garbage to create corrupt objects for debugging Git")), + OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")), + OPT_END() + }; + int i; + const char *errstr = NULL; + + argc = parse_options(argc, argv, prefix, hash_object_options, + hash_object_usage, 0); + + if (flags & HASH_WRITE_OBJECT) + prefix = setup_git_directory(); + else + prefix = setup_git_directory_gently(&nongit); + + if (vpath && prefix) { + vpath_free = prefix_filename(prefix, vpath); + vpath = vpath_free; + } + + git_config(git_default_config, NULL); + + if (stdin_paths) { + if (hashstdin) + errstr = "Can't use --stdin-paths with --stdin"; + else if (argc) + errstr = "Can't specify files with --stdin-paths"; + else if (vpath) + errstr = "Can't use --stdin-paths with --path"; + } + else { + if (hashstdin > 1) + errstr = "Multiple --stdin arguments are not supported"; + if (vpath && no_filters) + errstr = "Can't use --path with --no-filters"; + } + + if (errstr) { + error("%s", errstr); + usage_with_options(hash_object_usage, hash_object_options); + } + + if (hashstdin) + hash_fd(0, type, vpath, flags, literally); + + for (i = 0 ; i < argc; i++) { + const char *arg = argv[i]; + char *to_free = NULL; + + if (prefix) + arg = to_free = prefix_filename(prefix, arg); + hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg, + flags, literally); + free(to_free); + } + + if (stdin_paths) + hash_stdin_paths(type, no_filters, flags, literally); + + free(vpath_free); + + return 0; +} -- cgit v1.2.3