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![Stefan Beller](/assets/img/avatar_default.png)
This task emerged from b04ba2bb
(parse-options: deprecate OPT_BOOLEAN,
2011-09-27). hash-object is a plumbing layer command, so better
not change the input/output behavior for now.
Unfortunately we have these lines relying on the count up mechanism of
OPT_BOOLEAN:
if (hashstdin > 1)
errstr = "Multiple --stdin arguments are not supported";
Using OPT_BOOL will make "git hash-object --stdin --stdin" the same
as "git hash-object --stdin", resulting in just one object, which
will surprise users with an expectation to see two objects hashed.
Because it is not good to silently succeed and give an unexpected
result, even when the expectation is unrealistic, we use COUNTUP to
explicitly catch such an error.
Signed-off-by: Stefan Beller <stefanbeller@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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* Copyright (C) Junio C Hamano, 2005
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*/
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#include "builtin.h"
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#include "blob.h"
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#include "quote.h"
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#include "parse-options.h"
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#include "exec_cmd.h"
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static void hash_fd(int fd, const char *type, int write_object, const char *path)
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{
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struct stat st;
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unsigned char sha1[20];
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unsigned flags = (HASH_FORMAT_CHECK |
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(write_object ? HASH_WRITE_OBJECT : 0));
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if (fstat(fd, &st) < 0 ||
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index_fd(sha1, fd, &st, type_from_string(type), path, flags))
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die(write_object
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? "Unable to add %s to database"
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: "Unable to hash %s", path);
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printf("%s\n", sha1_to_hex(sha1));
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maybe_flush_or_die(stdout, "hash to stdout");
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}
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static void hash_object(const char *path, const char *type, int write_object,
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const char *vpath)
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{
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int fd;
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fd = open(path, O_RDONLY);
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if (fd < 0)
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die_errno("Cannot open '%s'", path);
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hash_fd(fd, type, write_object, vpath);
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}
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static int no_filters;
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static void hash_stdin_paths(const char *type, int write_objects)
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{
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struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
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while (strbuf_getline(&buf, stdin, '\n') != EOF) {
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if (buf.buf[0] == '"') {
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strbuf_reset(&nbuf);
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if (unquote_c_style(&nbuf, buf.buf, NULL))
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die("line is badly quoted");
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strbuf_swap(&buf, &nbuf);
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}
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hash_object(buf.buf, type, write_objects,
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no_filters ? NULL : buf.buf);
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}
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strbuf_release(&buf);
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strbuf_release(&nbuf);
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}
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static const char * const hash_object_usage[] = {
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N_("git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>..."),
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N_("git hash-object --stdin-paths < <list-of-paths>"),
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NULL
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};
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static const char *type;
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static int write_object;
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static int hashstdin;
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static int stdin_paths;
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static const char *vpath;
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static const struct option hash_object_options[] = {
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OPT_STRING('t', NULL, &type, N_("type"), N_("object type")),
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OPT_BOOL('w', NULL, &write_object, N_("write the object into the object database")),
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OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")),
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OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")),
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OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")),
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OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")),
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OPT_END()
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};
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int cmd_hash_object(int argc, const char **argv, const char *prefix)
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{
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int i;
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int prefix_length = -1;
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const char *errstr = NULL;
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type = blob_type;
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argc = parse_options(argc, argv, NULL, hash_object_options,
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hash_object_usage, 0);
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if (write_object) {
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prefix = setup_git_directory();
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prefix_length = prefix ? strlen(prefix) : 0;
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if (vpath && prefix)
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vpath = prefix_filename(prefix, prefix_length, vpath);
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}
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git_config(git_default_config, NULL);
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if (stdin_paths) {
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if (hashstdin)
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errstr = "Can't use --stdin-paths with --stdin";
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else if (argc)
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errstr = "Can't specify files with --stdin-paths";
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else if (vpath)
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errstr = "Can't use --stdin-paths with --path";
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}
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else {
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if (hashstdin > 1)
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errstr = "Multiple --stdin arguments are not supported";
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if (vpath && no_filters)
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errstr = "Can't use --path with --no-filters";
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}
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if (errstr) {
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error("%s", errstr);
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usage_with_options(hash_object_usage, hash_object_options);
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}
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if (hashstdin)
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hash_fd(0, type, write_object, vpath);
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for (i = 0 ; i < argc; i++) {
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const char *arg = argv[i];
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if (0 <= prefix_length)
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arg = prefix_filename(prefix, prefix_length, arg);
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hash_object(arg, type, write_object,
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no_filters ? NULL : vpath ? vpath : arg);
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}
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if (stdin_paths)
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hash_stdin_paths(type, write_object);
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return 0;
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}
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