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Merge branch 'dp/hash-literally' 

* dp/hash-literally:
  add --no-filters option to git hash-object
  add --path option to git hash-object
  use parse_options() in git hash-object
  correct usage help string for git-hash-object
  correct argument checking test for git hash-object
  teach index_fd to work with pipes
maint
Junio C Hamano 2008-08-19 21:43:25 -07:00
parent 614eef259f 4a3d85dcf6
commit d8eec50468
5 changed files with 175 additions and 119 deletions
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20
Documentation/git-hash-object.txt
View File

@ -8,7 +8,9 @@ git-hash-object - Compute object ID and optionally creates a blob from a file

SYNOPSIS
--------
'git hash-object' [-t <type>] [-w] [--stdin | --stdin-paths] [--] <file>...
[verse]
'git hash-object' [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>...
'git hash-object' [-t <type>] [-w] --stdin-paths < <list-of-paths>

DESCRIPTION
-----------
@ -35,6 +37,22 @@ OPTIONS
--stdin-paths::
Read file names from stdin instead of from the command-line.

--path::
Hash object as it were located at the given path. The location of
file does not directly influence on the hash value, but path is
used to determine what git filters should be applied to the object
before it can be placed to the object database, and, as result of
applying filters, the actual blob put into the object database may
differ from the given file. This option is mainly useful for hashing
temporary files located outside of the working directory or files
read from stdin.

--no-filters::
Hash the contents as is, ignoring any input filter that would
have been chosen by the attributes mechanism, including crlf
conversion. If the file is read from standard input then this
is always implied, unless the --path option is given.

Author
------
Written by Junio C Hamano <gitster@pobox.com>

1
cache.h
View File

@ -391,7 +391,6 @@ extern int ie_modified(const struct index_state *, struct cache_entry *, struct

extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);


153
hash-object.c
View File

@ -7,16 +7,14 @@
#include "cache.h"
#include "blob.h"
#include "quote.h"
#include "parse-options.h"

static void hash_object(const char *path, enum object_type type, int write_object)
static void hash_fd(int fd, const char *type, int write_object, const char *path)
{
int fd;
struct stat st;
unsigned char sha1[20];
fd = open(path, O_RDONLY);
if (fd < 0 ||
fstat(fd, &st) < 0 ||
index_fd(sha1, fd, &st, write_object, type, path))
if (fstat(fd, &st) < 0 ||
index_fd(sha1, fd, &st, write_object, type_from_string(type), path))
die(write_object
? "Unable to add %s to database"
: "Unable to hash %s", path);
@ -24,12 +22,14 @@ static void hash_object(const char *path, enum object_type type, int write_objec
maybe_flush_or_die(stdout, "hash to stdout");
}

static void hash_stdin(const char *type, int write_object)
static void hash_object(const char *path, const char *type, int write_object,
const char *vpath)
{
unsigned char sha1[20];
if (index_pipe(sha1, 0, type, write_object))
die("Unable to add stdin to database");
printf("%s\n", sha1_to_hex(sha1));
int fd;
fd = open(path, O_RDONLY);
if (fd < 0)
die("Cannot open %s", path);
hash_fd(fd, type, write_object, vpath);
}

static void hash_stdin_paths(const char *type, int write_objects)
@ -45,92 +45,91 @@ static void hash_stdin_paths(const char *type, int write_objects)
die("line is badly quoted");
strbuf_swap(&buf, &nbuf);
}
hash_object(buf.buf, type_from_string(type), write_objects);
hash_object(buf.buf, type, write_objects, buf.buf);
}
strbuf_release(&buf);
strbuf_release(&nbuf);
}

static const char hash_object_usage[] =
"git hash-object [ [-t <type>] [-w] [--stdin] <file>... | --stdin-paths < <list-of-paths> ]";
static const char * const hash_object_usage[] = {
"git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>...",
"git hash-object --stdin-paths < <list-of-paths>",
NULL
};

int main(int argc, char **argv)
static const char *type;
static int write_object;
static int hashstdin;
static int stdin_paths;
static int no_filters;
static const char *vpath;

static const struct option hash_object_options[] = {
OPT_STRING('t', NULL, &type, "type", "object type"),
OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
OPT_BOOLEAN( 0 , "no-filters", &no_filters, "store file as is without filters"),
OPT_STRING( 0 , "path", &vpath, "file", "process file as it were from this path"),
OPT_END()
};

int main(int argc, const char **argv)
{
int i;
const char *type = blob_type;
int write_object = 0;
const char *prefix = NULL;
int prefix_length = -1;
int no_more_flags = 0;
int hashstdin = 0;
int stdin_paths = 0;
const char *errstr = NULL;

type = blob_type;

git_config(git_default_config, NULL);

for (i = 1 ; i < argc; i++) {
if (!no_more_flags && argv[i][0] == '-') {
if (!strcmp(argv[i], "-t")) {
if (argc <= ++i)
usage(hash_object_usage);
type = argv[i];
}
else if (!strcmp(argv[i], "-w")) {
if (prefix_length < 0) {
prefix = setup_git_directory();
prefix_length =
prefix ? strlen(prefix) : 0;
}
write_object = 1;
}
else if (!strcmp(argv[i], "--")) {
no_more_flags = 1;
}
else if (!strcmp(argv[i], "--help"))
usage(hash_object_usage);
else if (!strcmp(argv[i], "--stdin-paths")) {
if (hashstdin) {
error("Can't use --stdin-paths with --stdin");
usage(hash_object_usage);
}
stdin_paths = 1;
argc = parse_options(argc, argv, hash_object_options, hash_object_usage, 0);

}
else if (!strcmp(argv[i], "--stdin")) {
if (stdin_paths) {
error("Can't use %s with --stdin-paths", argv[i]);
usage(hash_object_usage);
}
if (hashstdin)
die("Multiple --stdin arguments are not supported");
hashstdin = 1;
}
else
usage(hash_object_usage);
}
else {
const char *arg = argv[i];
if (write_object) {
prefix = setup_git_directory();
prefix_length = prefix ? strlen(prefix) : 0;
if (vpath && prefix)
vpath = prefix_filename(prefix, prefix_length, vpath);
}

if (stdin_paths) {
error("Can't specify files (such as \"%s\") with --stdin-paths", arg);
usage(hash_object_usage);
}
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 (no_filters)
errstr = "Can't use --stdin-paths with --no-filters";
}
else {
if (hashstdin > 1)
errstr = "Multiple --stdin arguments are not supported";
if (vpath && no_filters)
errstr = "Can't use --path with --no-filters";
}

if (hashstdin) {
hash_stdin(type, write_object);
hashstdin = 0;
}
if (0 <= prefix_length)
arg = prefix_filename(prefix, prefix_length,
arg);
hash_object(arg, type_from_string(type), write_object);
no_more_flags = 1;
}
if (errstr) {
error (errstr);
usage_with_options(hash_object_usage, hash_object_options);
}

if (hashstdin)
hash_fd(0, type, write_object, vpath);

for (i = 0 ; i < argc; i++) {
const char *arg = argv[i];

if (0 <= prefix_length)
arg = prefix_filename(prefix, prefix_length, arg);
hash_object(arg, type, write_object,
no_filters ? NULL : vpath ? vpath : arg);
}

if (stdin_paths)
hash_stdin_paths(type, write_object);

if (hashstdin)
hash_stdin(type, write_object);
return 0;
}

64
sha1_file.c
View File

@ -2360,51 +2360,22 @@ int has_sha1_file(const unsigned char *sha1)
return has_loose_object(sha1);
}

int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
static int index_mem(unsigned char *sha1, void *buf, size_t size,
int write_object, enum object_type type, const char *path)
{
struct strbuf buf;
int ret;

strbuf_init(&buf, 0);
if (strbuf_read(&buf, fd, 4096) < 0) {
strbuf_release(&buf);
return -1;
}

if (!type)
type = blob_type;
if (write_object)
ret = write_sha1_file(buf.buf, buf.len, type, sha1);
else
ret = hash_sha1_file(buf.buf, buf.len, type, sha1);
strbuf_release(&buf);

return ret;
}

int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
enum object_type type, const char *path)
{
size_t size = xsize_t(st->st_size);
void *buf = NULL;
int ret, re_allocated = 0;

if (size)
buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);

if (!type)
type = OBJ_BLOB;

/*
* Convert blobs to git internal format
*/
if ((type == OBJ_BLOB) && S_ISREG(st->st_mode)) {
if ((type == OBJ_BLOB) && path) {
struct strbuf nbuf;
strbuf_init(&nbuf, 0);
if (convert_to_git(path, buf, size, &nbuf,
write_object ? safe_crlf : 0)) {
munmap(buf, size);
buf = strbuf_detach(&nbuf, &size);
re_allocated = 1;
}
@ -2414,12 +2385,33 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
ret = write_sha1_file(buf, size, typename(type), sha1);
else
ret = hash_sha1_file(buf, size, typename(type), sha1);
if (re_allocated) {
if (re_allocated)
free(buf);
return ret;
}
if (size)
return ret;
}

int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
enum object_type type, const char *path)
{
int ret;
size_t size = xsize_t(st->st_size);

if (!S_ISREG(st->st_mode)) {
struct strbuf sbuf;
strbuf_init(&sbuf, 0);
if (strbuf_read(&sbuf, fd, 4096) >= 0)
ret = index_mem(sha1, sbuf.buf, sbuf.len, write_object,
type, path);
else
ret = -1;
strbuf_release(&sbuf);
} else if (size) {
void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
ret = index_mem(sha1, buf, size, write_object, type, path);
munmap(buf, size);
} else
ret = index_mem(sha1, NULL, size, write_object, type, path);
close(fd);
return ret;
}


56
t/t1007-hash-object.sh
View File

@ -49,16 +49,28 @@ setup_repo
# Argument checking

test_expect_success "multiple '--stdin's are rejected" '
test_must_fail git hash-object --stdin --stdin < example
echo example | test_must_fail git hash-object --stdin --stdin
'

test_expect_success "Can't use --stdin and --stdin-paths together" '
test_must_fail git hash-object --stdin --stdin-paths &&
test_must_fail git hash-object --stdin-paths --stdin
echo example | test_must_fail git hash-object --stdin --stdin-paths &&
echo example | test_must_fail git hash-object --stdin-paths --stdin
'

test_expect_success "Can't pass filenames as arguments with --stdin-paths" '
test_must_fail git hash-object --stdin-paths hello < example
echo example | test_must_fail git hash-object --stdin-paths hello
'

test_expect_success "Can't use --path with --stdin-paths" '
echo example | test_must_fail git hash-object --stdin-paths --path=foo
'

test_expect_success "Can't use --stdin-paths with --no-filters" '
echo example | test_must_fail git hash-object --stdin-paths --no-filters
'

test_expect_success "Can't use --path with --no-filters" '
test_must_fail git hash-object --no-filters --path=foo
'

# Behavior
@ -93,6 +105,42 @@ test_expect_success 'git hash-object --stdin file1 <file0 first operates on file
test "$obname1" = "$obname1new"
'

test_expect_success 'check that appropriate filter is invoke when --path is used' '
echo fooQ | tr Q "\\015" >file0 &&
cp file0 file1 &&
echo "file0 -crlf" >.gitattributes &&
echo "file1 crlf" >>.gitattributes &&
git config core.autocrlf true &&
file0_sha=$(git hash-object file0) &&
file1_sha=$(git hash-object file1) &&
test "$file0_sha" != "$file1_sha" &&
path1_sha=$(git hash-object --path=file1 file0) &&
path0_sha=$(git hash-object --path=file0 file1) &&
test "$file0_sha" = "$path0_sha" &&
test "$file1_sha" = "$path1_sha" &&
path1_sha=$(cat file0 | git hash-object --path=file1 --stdin) &&
path0_sha=$(cat file1 | git hash-object --path=file0 --stdin) &&
test "$file0_sha" = "$path0_sha" &&
test "$file1_sha" = "$path1_sha" &&
git config --unset core.autocrlf
'

test_expect_success 'check that --no-filters option works' '
echo fooQ | tr Q "\\015" >file0 &&
cp file0 file1 &&
echo "file0 -crlf" >.gitattributes &&
echo "file1 crlf" >>.gitattributes &&
git config core.autocrlf true &&
file0_sha=$(git hash-object file0) &&
file1_sha=$(git hash-object file1) &&
test "$file0_sha" != "$file1_sha" &&
nofilters_file1=$(git hash-object --no-filters file1) &&
test "$file0_sha" = "$nofilters_file1" &&
nofilters_file1=$(cat file1 | git hash-object --stdin) &&
test "$file0_sha" = "$nofilters_file1" &&
git config --unset core.autocrlf
'

pop_repo

for args in "-w --stdin" "--stdin -w"; do