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Diffstat (limited to 'builtin/cat-file.c')
-rw-r--r--builtin/cat-file.c177
1 files changed, 134 insertions, 43 deletions
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 8e57998..30383e9 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -17,13 +17,38 @@ struct batch_options {
int print_contents;
int buffer_output;
int all_objects;
+ int cmdmode; /* may be 'w' or 'c' for --filters or --textconv */
const char *format;
};
+static const char *force_path;
+
+static int filter_object(const char *path, unsigned mode,
+ const struct object_id *oid,
+ char **buf, unsigned long *size)
+{
+ enum object_type type;
+
+ *buf = read_sha1_file(oid->hash, &type, size);
+ if (!*buf)
+ return error(_("cannot read object %s '%s'"),
+ oid_to_hex(oid), path);
+ if ((type == OBJ_BLOB) && S_ISREG(mode)) {
+ struct strbuf strbuf = STRBUF_INIT;
+ if (convert_to_working_tree(path, *buf, *size, &strbuf)) {
+ free(*buf);
+ *size = strbuf.len;
+ *buf = strbuf_detach(&strbuf, NULL);
+ }
+ }
+
+ return 0;
+}
+
static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
int unknown_type)
{
- unsigned char sha1[20];
+ struct object_id oid;
enum object_type type;
char *buf;
unsigned long size;
@@ -31,18 +56,24 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
struct object_info oi = OBJECT_INFO_INIT;
struct strbuf sb = STRBUF_INIT;
unsigned flags = LOOKUP_REPLACE_OBJECT;
+ const char *path = force_path;
if (unknown_type)
flags |= LOOKUP_UNKNOWN_OBJECT;
- if (get_sha1_with_context(obj_name, 0, sha1, &obj_context))
+ if (get_sha1_with_context(obj_name, 0, oid.hash, &obj_context))
die("Not a valid object name %s", obj_name);
+ if (!path)
+ path = obj_context.path;
+ if (obj_context.mode == S_IFINVALID)
+ obj_context.mode = 0100644;
+
buf = NULL;
switch (opt) {
case 't':
oi.typename = &sb;
- if (sha1_object_info_extended(sha1, &oi, flags) < 0)
+ if (sha1_object_info_extended(oid.hash, &oi, flags) < 0)
die("git cat-file: could not get object info");
if (sb.len) {
printf("%s\n", sb.buf);
@@ -53,24 +84,34 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
case 's':
oi.sizep = &size;
- if (sha1_object_info_extended(sha1, &oi, flags) < 0)
+ if (sha1_object_info_extended(oid.hash, &oi, flags) < 0)
die("git cat-file: could not get object info");
printf("%lu\n", size);
return 0;
case 'e':
- return !has_sha1_file(sha1);
+ return !has_object_file(&oid);
+
+ case 'w':
+ if (!path[0])
+ die("git cat-file --filters %s: <object> must be "
+ "<sha1:path>", obj_name);
+
+ if (filter_object(path, obj_context.mode,
+ &oid, &buf, &size))
+ return -1;
+ break;
case 'c':
- if (!obj_context.path[0])
+ if (!path[0])
die("git cat-file --textconv %s: <object> must be <sha1:path>",
obj_name);
- if (textconv_object(obj_context.path, obj_context.mode, sha1, 1, &buf, &size))
+ if (textconv_object(path, obj_context.mode, &oid, 1, &buf, &size))
break;
case 'p':
- type = sha1_object_info(sha1, NULL);
+ type = sha1_object_info(oid.hash, NULL);
if (type < 0)
die("Not a valid object name %s", obj_name);
@@ -83,8 +124,8 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
}
if (type == OBJ_BLOB)
- return stream_blob_to_fd(1, sha1, NULL, 0);
- buf = read_sha1_file(sha1, &type, &size);
+ return stream_blob_to_fd(1, &oid, NULL, 0);
+ buf = read_sha1_file(oid.hash, &type, &size);
if (!buf)
die("Cannot read object %s", obj_name);
@@ -93,19 +134,19 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
case 0:
if (type_from_string(exp_type) == OBJ_BLOB) {
- unsigned char blob_sha1[20];
- if (sha1_object_info(sha1, NULL) == OBJ_TAG) {
- char *buffer = read_sha1_file(sha1, &type, &size);
+ struct object_id blob_oid;
+ if (sha1_object_info(oid.hash, NULL) == OBJ_TAG) {
+ char *buffer = read_sha1_file(oid.hash, &type, &size);
const char *target;
if (!skip_prefix(buffer, "object ", &target) ||
- get_sha1_hex(target, blob_sha1))
- die("%s not a valid tag", sha1_to_hex(sha1));
+ get_oid_hex(target, &blob_oid))
+ die("%s not a valid tag", oid_to_hex(&oid));
free(buffer);
} else
- hashcpy(blob_sha1, sha1);
+ oidcpy(&blob_oid, &oid);
- if (sha1_object_info(blob_sha1, NULL) == OBJ_BLOB)
- return stream_blob_to_fd(1, blob_sha1, NULL, 0);
+ if (sha1_object_info(blob_oid.hash, NULL) == OBJ_BLOB)
+ return stream_blob_to_fd(1, &blob_oid, NULL, 0);
/*
* we attempted to dereference a tag to a blob
* and failed; there may be new dereference
@@ -113,7 +154,7 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
* fall-back to the usual case.
*/
}
- buf = read_object_with_reference(sha1, exp_type, &size, NULL);
+ buf = read_object_with_reference(oid.hash, exp_type, &size, NULL);
break;
default:
@@ -128,12 +169,12 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
}
struct expand_data {
- unsigned char sha1[20];
+ struct object_id oid;
enum object_type type;
unsigned long size;
- unsigned long disk_size;
+ off_t disk_size;
const char *rest;
- unsigned char delta_base_sha1[20];
+ struct object_id delta_base_oid;
/*
* If mark_query is true, we do not expand anything, but rather
@@ -176,7 +217,7 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
if (is_atom("objectname", atom, len)) {
if (!data->mark_query)
- strbuf_addstr(sb, sha1_to_hex(data->sha1));
+ strbuf_addstr(sb, oid_to_hex(&data->oid));
} else if (is_atom("objecttype", atom, len)) {
if (data->mark_query)
data->info.typep = &data->type;
@@ -191,7 +232,7 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
if (data->mark_query)
data->info.disk_sizep = &data->disk_size;
else
- strbuf_addf(sb, "%lu", data->disk_size);
+ strbuf_addf(sb, "%"PRIuMAX, (uintmax_t)data->disk_size);
} else if (is_atom("rest", atom, len)) {
if (data->mark_query)
data->split_on_whitespace = 1;
@@ -199,9 +240,10 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
strbuf_addstr(sb, data->rest);
} else if (is_atom("deltabase", atom, len)) {
if (data->mark_query)
- data->info.delta_base_sha1 = data->delta_base_sha1;
+ data->info.delta_base_sha1 = data->delta_base_oid.hash;
else
- strbuf_addstr(sb, sha1_to_hex(data->delta_base_sha1));
+ strbuf_addstr(sb,
+ oid_to_hex(&data->delta_base_oid));
} else
die("unknown format element: %.*s", len, atom);
}
@@ -232,28 +274,53 @@ static void batch_write(struct batch_options *opt, const void *data, int len)
static void print_object_or_die(struct batch_options *opt, struct expand_data *data)
{
- const unsigned char *sha1 = data->sha1;
+ const struct object_id *oid = &data->oid;
assert(data->info.typep);
if (data->type == OBJ_BLOB) {
if (opt->buffer_output)
fflush(stdout);
- if (stream_blob_to_fd(1, sha1, NULL, 0) < 0)
- die("unable to stream %s to stdout", sha1_to_hex(sha1));
+ if (opt->cmdmode) {
+ char *contents;
+ unsigned long size;
+
+ if (!data->rest)
+ die("missing path for '%s'", oid_to_hex(oid));
+
+ if (opt->cmdmode == 'w') {
+ if (filter_object(data->rest, 0100644, oid,
+ &contents, &size))
+ die("could not convert '%s' %s",
+ oid_to_hex(oid), data->rest);
+ } else if (opt->cmdmode == 'c') {
+ enum object_type type;
+ if (!textconv_object(data->rest, 0100644, oid,
+ 1, &contents, &size))
+ contents = read_sha1_file(oid->hash, &type,
+ &size);
+ if (!contents)
+ die("could not convert '%s' %s",
+ oid_to_hex(oid), data->rest);
+ } else
+ die("BUG: invalid cmdmode: %c", opt->cmdmode);
+ batch_write(opt, contents, size);
+ free(contents);
+ } else if (stream_blob_to_fd(1, oid, NULL, 0) < 0)
+ die("unable to stream %s to stdout", oid_to_hex(oid));
}
else {
enum object_type type;
unsigned long size;
void *contents;
- contents = read_sha1_file(sha1, &type, &size);
+ contents = read_sha1_file(oid->hash, &type, &size);
if (!contents)
- die("object %s disappeared", sha1_to_hex(sha1));
+ die("object %s disappeared", oid_to_hex(oid));
if (type != data->type)
- die("object %s changed type!?", sha1_to_hex(sha1));
+ die("object %s changed type!?", oid_to_hex(oid));
if (data->info.sizep && size != data->size)
- die("object %s changed size!?", sha1_to_hex(sha1));
+ die("object %s changed size!?", oid_to_hex(oid));
batch_write(opt, contents, size);
free(contents);
@@ -266,8 +333,9 @@ static void batch_object_write(const char *obj_name, struct batch_options *opt,
struct strbuf buf = STRBUF_INIT;
if (!data->skip_object_info &&
- sha1_object_info_extended(data->sha1, &data->info, LOOKUP_REPLACE_OBJECT) < 0) {
- printf("%s missing\n", obj_name ? obj_name : sha1_to_hex(data->sha1));
+ sha1_object_info_extended(data->oid.hash, &data->info, LOOKUP_REPLACE_OBJECT) < 0) {
+ printf("%s missing\n",
+ obj_name ? obj_name : oid_to_hex(&data->oid));
fflush(stdout);
return;
}
@@ -290,7 +358,7 @@ static void batch_one_object(const char *obj_name, struct batch_options *opt,
int flags = opt->follow_symlinks ? GET_SHA1_FOLLOW_SYMLINKS : 0;
enum follow_symlinks_result result;
- result = get_sha1_with_context(obj_name, flags, data->sha1, &ctx);
+ result = get_sha1_with_context(obj_name, flags, data->oid.hash, &ctx);
if (result != FOUND) {
switch (result) {
case MISSING_OBJECT:
@@ -333,11 +401,12 @@ struct object_cb_data {
struct expand_data *expand;
};
-static void batch_object_cb(const unsigned char sha1[20], void *vdata)
+static int batch_object_cb(const unsigned char sha1[20], void *vdata)
{
struct object_cb_data *data = vdata;
- hashcpy(data->expand->sha1, sha1);
+ hashcpy(data->expand->oid.hash, sha1);
batch_object_write(NULL, data->opt, data->expand);
+ return 0;
}
static int batch_loose_object(const unsigned char *sha1,
@@ -376,6 +445,8 @@ static int batch_objects(struct batch_options *opt)
data.mark_query = 1;
strbuf_expand(&buf, opt->format, expand_format, &data);
data.mark_query = 0;
+ if (opt->cmdmode)
+ data.split_on_whitespace = 1;
if (opt->all_objects) {
struct object_info empty = OBJECT_INFO_INIT;
@@ -439,8 +510,8 @@ static int batch_objects(struct batch_options *opt)
}
static const char * const cat_file_usage[] = {
- N_("git cat-file (-t [--allow-unknown-type]|-s [--allow-unknown-type]|-e|-p|<type>|--textconv) <object>"),
- N_("git cat-file (--batch | --batch-check) [--follow-symlinks]"),
+ N_("git cat-file (-t [--allow-unknown-type] | -s [--allow-unknown-type] | -e | -p | <type> | --textconv | --filters) [--path=<path>] <object>"),
+ N_("git cat-file (--batch | --batch-check) [--follow-symlinks] [--textconv | --filters]"),
NULL
};
@@ -485,6 +556,10 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
OPT_CMDMODE('p', NULL, &opt, N_("pretty-print object's content"), 'p'),
OPT_CMDMODE(0, "textconv", &opt,
N_("for blob objects, run textconv on object's content"), 'c'),
+ OPT_CMDMODE(0, "filters", &opt,
+ N_("for blob objects, run filters on object's content"), 'w'),
+ OPT_STRING(0, "path", &force_path, N_("blob"),
+ N_("use a specific path for --textconv/--filters")),
OPT_BOOL(0, "allow-unknown-type", &unknown_type,
N_("allow -s and -t to work with broken/corrupt objects")),
OPT_BOOL(0, "buffer", &batch.buffer_output, N_("buffer --batch output")),
@@ -507,7 +582,9 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
argc = parse_options(argc, argv, prefix, options, cat_file_usage, 0);
if (opt) {
- if (argc == 1)
+ if (batch.enabled && (opt == 'c' || opt == 'w'))
+ batch.cmdmode = opt;
+ else if (argc == 1)
obj_name = argv[0];
else
usage_with_options(cat_file_usage, options);
@@ -519,14 +596,28 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
} else
usage_with_options(cat_file_usage, options);
}
- if (batch.enabled && (opt || argc)) {
- usage_with_options(cat_file_usage, options);
+ if (batch.enabled) {
+ if (batch.cmdmode != opt || argc)
+ usage_with_options(cat_file_usage, options);
+ if (batch.cmdmode && batch.all_objects)
+ die("--batch-all-objects cannot be combined with "
+ "--textconv nor with --filters");
}
if ((batch.follow_symlinks || batch.all_objects) && !batch.enabled) {
usage_with_options(cat_file_usage, options);
}
+ if (force_path && opt != 'c' && opt != 'w') {
+ error("--path=<path> needs --textconv or --filters");
+ usage_with_options(cat_file_usage, options);
+ }
+
+ if (force_path && batch.enabled) {
+ error("--path=<path> incompatible with --batch");
+ usage_with_options(cat_file_usage, options);
+ }
+
if (batch.buffer_output < 0)
batch.buffer_output = batch.all_objects;