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git/builtin/cat-file.c

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/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "builtin.h"
#include "config.h"
#include "convert.h"
#include "diff.h"
#include "environment.h"
#include "gettext.h"
#include "hex.h"
#include "ident.h"
#include "parse-options.h"
#include "userdiff.h"
#include "streaming.h"
#include "oid-array.h"
#include "packfile.h"
#include "object-file.h"
#include "object-name.h"
#include "object-store-ll.h"
#include "replace-object.h"
#include "promisor-remote.h"
#include "mailmap.h"
#include "write-or-die.h"
enum batch_mode {
BATCH_MODE_CONTENTS,
BATCH_MODE_INFO,
BATCH_MODE_QUEUE_AND_DISPATCH,
};
struct batch_options {
int enabled;
int follow_symlinks;
enum batch_mode batch_mode;
int buffer_output;
int all_objects;
int unordered;
int transform_mode; /* may be 'w' or 'c' for --filters or --textconv */
char input_delim;
char output_delim;
const char *format;
};
static const char *force_path;
static struct string_list mailmap = STRING_LIST_INIT_NODUP;
static int use_mailmap;
static char *replace_idents_using_mailmap(char *, size_t *);
static char *replace_idents_using_mailmap(char *object_buf, size_t *size)
{
struct strbuf sb = STRBUF_INIT;
const char *headers[] = { "author ", "committer ", "tagger ", NULL };
strbuf_attach(&sb, object_buf, *size, *size + 1);
apply_mailmap_to_header(&sb, headers, &mailmap);
*size = sb.len;
return strbuf_detach(&sb, NULL);
}
static int filter_object(const char *path, unsigned mode,
const struct object_id *oid,
char **buf, unsigned long *size)
{
enum object_type type;
*buf = repo_read_object_file(the_repository, oid, &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;
struct checkout_metadata meta;
init_checkout_metadata(&meta, NULL, NULL, oid);
if (convert_to_working_tree(the_repository->index, path, *buf, *size, &strbuf, &meta)) {
free(*buf);
*size = strbuf.len;
*buf = strbuf_detach(&strbuf, NULL);
}
}
return 0;
}
static int stream_blob(const struct object_id *oid)
{
if (stream_blob_to_fd(1, oid, NULL, 0))
die("unable to stream %s to stdout", oid_to_hex(oid));
return 0;
}
static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
int unknown_type)
{
int ret;
struct object_id oid;
enum object_type type;
char *buf;
unsigned long size;
struct object_context obj_context = {0};
struct object_info oi = OBJECT_INFO_INIT;
struct strbuf sb = STRBUF_INIT;
unsigned flags = OBJECT_INFO_LOOKUP_REPLACE;
unsigned get_oid_flags =
GET_OID_RECORD_PATH |
GET_OID_ONLY_TO_DIE |
GET_OID_HASH_ANY;
const char *path = force_path;
const int opt_cw = (opt == 'c' || opt == 'w');
if (!path && opt_cw)
get_oid_flags |= GET_OID_REQUIRE_PATH;
if (unknown_type)
flags |= OBJECT_INFO_ALLOW_UNKNOWN_TYPE;
if (get_oid_with_context(the_repository, obj_name, get_oid_flags, &oid,
&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.type_name = &sb;
if (oid_object_info_extended(the_repository, &oid, &oi, flags) < 0)
die("git cat-file: could not get object info");
if (sb.len) {
printf("%s\n", sb.buf);
strbuf_release(&sb);
ret = 0;
goto cleanup;
}
break;
case 's':
oi.sizep = &size;
if (use_mailmap) {
oi.typep = &type;
oi.contentp = (void**)&buf;
}
if (oid_object_info_extended(the_repository, &oid, &oi, flags) < 0)
die("git cat-file: could not get object info");
if (use_mailmap && (type == OBJ_COMMIT || type == OBJ_TAG)) {
size_t s = size;
buf = replace_idents_using_mailmap(buf, &s);
size = cast_size_t_to_ulong(s);
}
printf("%"PRIuMAX"\n", (uintmax_t)size);
ret = 0;
goto cleanup;
case 'e':
ret = !repo_has_object_file(the_repository, &oid);
goto cleanup;
case 'w':
if (filter_object(path, obj_context.mode,
&oid, &buf, &size)) {
ret = -1;
goto cleanup;
}
break;
case 'c':
if (textconv_object(the_repository, path, obj_context.mode,
&oid, 1, &buf, &size))
break;
/* else fallthrough */
case 'p':
type = oid_object_info(the_repository, &oid, NULL);
if (type < 0)
die("Not a valid object name %s", obj_name);
/* custom pretty-print here */
if (type == OBJ_TREE) {
const char *ls_args[3] = { NULL };
ls_args[0] = "ls-tree";
ls_args[1] = obj_name;
ret = cmd_ls_tree(2, ls_args, NULL);
goto cleanup;
}
if (type == OBJ_BLOB) {
ret = stream_blob(&oid);
goto cleanup;
}
buf = repo_read_object_file(the_repository, &oid, &type,
&size);
if (!buf)
die("Cannot read object %s", obj_name);
if (use_mailmap) {
size_t s = size;
buf = replace_idents_using_mailmap(buf, &s);
size = cast_size_t_to_ulong(s);
}
/* otherwise just spit out the data */
break;
case 0:
{
enum object_type exp_type_id = type_from_string(exp_type);
if (exp_type_id == OBJ_BLOB) {
struct object_id blob_oid;
if (oid_object_info(the_repository, &oid, NULL) == OBJ_TAG) {
char *buffer = repo_read_object_file(the_repository,
&oid,
&type,
&size);
const char *target;
if (!buffer)
die(_("unable to read %s"), oid_to_hex(&oid));
if (!skip_prefix(buffer, "object ", &target) ||
get_oid_hex_algop(target, &blob_oid,
&hash_algos[oid.algo]))
die("%s not a valid tag", oid_to_hex(&oid));
free(buffer);
} else
oidcpy(&blob_oid, &oid);
if (oid_object_info(the_repository, &blob_oid, NULL) == OBJ_BLOB) {
ret = stream_blob(&blob_oid);
goto cleanup;
}
/*
* we attempted to dereference a tag to a blob
* and failed; there may be new dereference
* mechanisms this code is not aware of.
* fall-back to the usual case.
*/
}
buf = read_object_with_reference(the_repository, &oid,
exp_type_id, &size, NULL);
if (use_mailmap) {
size_t s = size;
buf = replace_idents_using_mailmap(buf, &s);
size = cast_size_t_to_ulong(s);
}
break;
}
default:
die("git cat-file: unknown option: %s", exp_type);
}
if (!buf)
die("git cat-file %s: bad file", obj_name);
write_or_die(1, buf, size);
ret = 0;
cleanup:
free(buf);
object_context_release(&obj_context);
return ret;
}
struct expand_data {
struct object_id oid;
enum object_type type;
unsigned long size;
off_t disk_size;
const char *rest;
struct object_id delta_base_oid;
/*
* If mark_query is true, we do not expand anything, but rather
* just mark the object_info with items we wish to query.
*/
int mark_query;
/*
* Whether to split the input on whitespace before feeding it to
* get_sha1; this is decided during the mark_query phase based on
* whether we have a %(rest) token in our format.
*/
int split_on_whitespace;
/*
* After a mark_query run, this object_info is set up to be
* passed to oid_object_info_extended. It will point to the data
* elements above, so you can retrieve the response from there.
*/
struct object_info info;
/*
* This flag will be true if the requested batch format and options
* don't require us to call oid_object_info, which can then be
* optimized out.
*/
unsigned skip_object_info : 1;
};
static int is_atom(const char *atom, const char *s, int slen)
{
int alen = strlen(atom);
return alen == slen && !memcmp(atom, s, alen);
}
static int expand_atom(struct strbuf *sb, const char *atom, int len,
struct expand_data *data)
{
if (is_atom("objectname", atom, len)) {
if (!data->mark_query)
strbuf_addstr(sb, oid_to_hex(&data->oid));
} else if (is_atom("objecttype", atom, len)) {
if (data->mark_query)
data->info.typep = &data->type;
else
strbuf_addstr(sb, type_name(data->type));
} else if (is_atom("objectsize", atom, len)) {
if (data->mark_query)
data->info.sizep = &data->size;
else
strbuf_addf(sb, "%"PRIuMAX , (uintmax_t)data->size);
} else if (is_atom("objectsize:disk", atom, len)) {
if (data->mark_query)
data->info.disk_sizep = &data->disk_size;
else
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;
else if (data->rest)
strbuf_addstr(sb, data->rest);
} else if (is_atom("deltabase", atom, len)) {
if (data->mark_query)
data->info.delta_base_oid = &data->delta_base_oid;
else
strbuf_addstr(sb,
oid_to_hex(&data->delta_base_oid));
} else
return 0;
return 1;
}
static void expand_format(struct strbuf *sb, const char *start,
struct expand_data *data)
{
while (strbuf_expand_step(sb, &start)) {
const char *end;
if (skip_prefix(start, "%", &start) || *start != '(')
strbuf_addch(sb, '%');
else if ((end = strchr(start + 1, ')')) &&
expand_atom(sb, start + 1, end - start - 1, data))
start = end + 1;
else
strbuf_expand_bad_format(start, "cat-file");
}
}
static void batch_write(struct batch_options *opt, const void *data, int len)
{
if (opt->buffer_output) {
if (fwrite(data, 1, len, stdout) != len)
die_errno("unable to write to stdout");
} else
write_or_die(1, data, len);
}
static void print_object_or_die(struct batch_options *opt, struct expand_data *data)
{
const struct object_id *oid = &data->oid;
assert(data->info.typep);
if (data->type == OBJ_BLOB) {
if (opt->buffer_output)
fflush(stdout);
if (opt->transform_mode) {
char *contents;
unsigned long size;
if (!data->rest)
die("missing path for '%s'", oid_to_hex(oid));
if (opt->transform_mode == '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->transform_mode == 'c') {
enum object_type type;
if (!textconv_object(the_repository,
data->rest, 0100644, oid,
1, &contents, &size))
contents = repo_read_object_file(the_repository,
oid,
&type,
&size);
if (!contents)
die("could not convert '%s' %s",
oid_to_hex(oid), data->rest);
} else
BUG("invalid transform_mode: %c", opt->transform_mode);
batch_write(opt, contents, size);
free(contents);
} else {
stream_blob(oid);
}
}
else {
enum object_type type;
unsigned long size;
void *contents;
contents = repo_read_object_file(the_repository, oid, &type,
&size);
if (!contents)
die("object %s disappeared", oid_to_hex(oid));
if (use_mailmap) {
size_t s = size;
contents = replace_idents_using_mailmap(contents, &s);
size = cast_size_t_to_ulong(s);
}
if (type != data->type)
die("object %s changed type!?", oid_to_hex(oid));
if (data->info.sizep && size != data->size && !use_mailmap)
die("object %s changed size!?", oid_to_hex(oid));
batch_write(opt, contents, size);
free(contents);
}
}
static void print_default_format(struct strbuf *scratch, struct expand_data *data,
struct batch_options *opt)
{
strbuf_addf(scratch, "%s %s %"PRIuMAX"%c", oid_to_hex(&data->oid),
type_name(data->type),
(uintmax_t)data->size, opt->output_delim);
}
/*
* If "pack" is non-NULL, then "offset" is the byte offset within the pack from
* which the object may be accessed (though note that we may also rely on
* data->oid, too). If "pack" is NULL, then offset is ignored.
*/
static void batch_object_write(const char *obj_name,
struct strbuf *scratch,
struct batch_options *opt,
struct expand_data *data,
struct packed_git *pack,
off_t offset)
{
if (!data->skip_object_info) {
int ret;
if (use_mailmap)
data->info.typep = &data->type;
if (pack)
ret = packed_object_info(the_repository, pack, offset,
&data->info);
else
ret = oid_object_info_extended(the_repository,
&data->oid, &data->info,
OBJECT_INFO_LOOKUP_REPLACE);
if (ret < 0) {
printf("%s missing%c",
obj_name ? obj_name : oid_to_hex(&data->oid), opt->output_delim);
fflush(stdout);
return;
}
if (use_mailmap && (data->type == OBJ_COMMIT || data->type == OBJ_TAG)) {
size_t s = data->size;
char *buf = NULL;
buf = repo_read_object_file(the_repository, &data->oid, &data->type,
&data->size);
if (!buf)
die(_("unable to read %s"), oid_to_hex(&data->oid));
buf = replace_idents_using_mailmap(buf, &s);
data->size = cast_size_t_to_ulong(s);
free(buf);
}
}
strbuf_reset(scratch);
if (!opt->format) {
print_default_format(scratch, data, opt);
} else {
expand_format(scratch, opt->format, data);
strbuf_addch(scratch, opt->output_delim);
}
batch_write(opt, scratch->buf, scratch->len);
if (opt->batch_mode == BATCH_MODE_CONTENTS) {
print_object_or_die(opt, data);
batch_write(opt, &opt->output_delim, 1);
}
}
static void batch_one_object(const char *obj_name,
struct strbuf *scratch,
struct batch_options *opt,
struct expand_data *data)
{
struct object_context ctx = {0};
int flags =
GET_OID_HASH_ANY |
(opt->follow_symlinks ? GET_OID_FOLLOW_SYMLINKS : 0);
enum get_oid_result result;
result = get_oid_with_context(the_repository, obj_name,
flags, &data->oid, &ctx);
if (result != FOUND) {
switch (result) {
case MISSING_OBJECT:
printf("%s missing%c", obj_name, opt->output_delim);
break;
case SHORT_NAME_AMBIGUOUS:
printf("%s ambiguous%c", obj_name, opt->output_delim);
break;
case DANGLING_SYMLINK:
printf("dangling %"PRIuMAX"%c%s%c",
(uintmax_t)strlen(obj_name),
opt->output_delim, obj_name, opt->output_delim);
break;
case SYMLINK_LOOP:
printf("loop %"PRIuMAX"%c%s%c",
(uintmax_t)strlen(obj_name),
opt->output_delim, obj_name, opt->output_delim);
break;
case NOT_DIR:
printf("notdir %"PRIuMAX"%c%s%c",
(uintmax_t)strlen(obj_name),
opt->output_delim, obj_name, opt->output_delim);
break;
default:
BUG("unknown get_sha1_with_context result %d\n",
result);
break;
}
fflush(stdout);
goto out;
}
if (ctx.mode == 0) {
printf("symlink %"PRIuMAX"%c%s%c",
(uintmax_t)ctx.symlink_path.len,
opt->output_delim, ctx.symlink_path.buf, opt->output_delim);
fflush(stdout);
goto out;
}
batch_object_write(obj_name, scratch, opt, data, NULL, 0);
out:
object_context_release(&ctx);
}
struct object_cb_data {
struct batch_options *opt;
struct expand_data *expand;
struct oidset *seen;
struct strbuf *scratch;
};
static int batch_object_cb(const struct object_id *oid, void *vdata)
{
struct object_cb_data *data = vdata;
oidcpy(&data->expand->oid, oid);
batch_object_write(NULL, data->scratch, data->opt, data->expand,
NULL, 0);
return 0;
}
static int collect_loose_object(const struct object_id *oid,
const char *path UNUSED,
void *data)
{
oid_array_append(data, oid);
return 0;
}
static int collect_packed_object(const struct object_id *oid,
struct packed_git *pack UNUSED,
uint32_t pos UNUSED,
void *data)
{
oid_array_append(data, oid);
return 0;
}
static int batch_unordered_object(const struct object_id *oid,
struct packed_git *pack, off_t offset,
void *vdata)
{
struct object_cb_data *data = vdata;
if (oidset_insert(data->seen, oid))
return 0;
oidcpy(&data->expand->oid, oid);
batch_object_write(NULL, data->scratch, data->opt, data->expand,
pack, offset);
return 0;
}
static int batch_unordered_loose(const struct object_id *oid,
const char *path UNUSED,
void *data)
{
return batch_unordered_object(oid, NULL, 0, data);
}
static int batch_unordered_packed(const struct object_id *oid,
struct packed_git *pack,
uint32_t pos,
void *data)
{
return batch_unordered_object(oid, pack,
nth_packed_object_offset(pack, pos),
data);
}
typedef void (*parse_cmd_fn_t)(struct batch_options *, const char *,
struct strbuf *, struct expand_data *);
struct queued_cmd {
parse_cmd_fn_t fn;
char *line;
};
static void parse_cmd_contents(struct batch_options *opt,
const char *line,
struct strbuf *output,
struct expand_data *data)
{
opt->batch_mode = BATCH_MODE_CONTENTS;
batch_one_object(line, output, opt, data);
}
static void parse_cmd_info(struct batch_options *opt,
const char *line,
struct strbuf *output,
struct expand_data *data)
{
opt->batch_mode = BATCH_MODE_INFO;
batch_one_object(line, output, opt, data);
}
static void dispatch_calls(struct batch_options *opt,
struct strbuf *output,
struct expand_data *data,
struct queued_cmd *cmd,
int nr)
{
int i;
if (!opt->buffer_output)
die(_("flush is only for --buffer mode"));
for (i = 0; i < nr; i++)
cmd[i].fn(opt, cmd[i].line, output, data);
fflush(stdout);
}
static void free_cmds(struct queued_cmd *cmd, size_t *nr)
{
size_t i;
for (i = 0; i < *nr; i++)
FREE_AND_NULL(cmd[i].line);
*nr = 0;
}
static const struct parse_cmd {
const char *name;
parse_cmd_fn_t fn;
unsigned takes_args;
} commands[] = {
{ "contents", parse_cmd_contents, 1},
{ "info", parse_cmd_info, 1},
{ "flush", NULL, 0},
};
static void batch_objects_command(struct batch_options *opt,
struct strbuf *output,
struct expand_data *data)
{
struct strbuf input = STRBUF_INIT;
struct queued_cmd *queued_cmd = NULL;
size_t alloc = 0, nr = 0;
while (strbuf_getdelim_strip_crlf(&input, stdin, opt->input_delim) != EOF) {
int i;
const struct parse_cmd *cmd = NULL;
const char *p = NULL, *cmd_end;
struct queued_cmd call = {0};
if (!input.len)
die(_("empty command in input"));
if (isspace(*input.buf))
die(_("whitespace before command: '%s'"), input.buf);
for (i = 0; i < ARRAY_SIZE(commands); i++) {
if (!skip_prefix(input.buf, commands[i].name, &cmd_end))
continue;
cmd = &commands[i];
if (cmd->takes_args) {
if (*cmd_end != ' ')
die(_("%s requires arguments"),
commands[i].name);
p = cmd_end + 1;
} else if (*cmd_end) {
die(_("%s takes no arguments"),
commands[i].name);
}
break;
}
if (!cmd)
die(_("unknown command: '%s'"), input.buf);
if (!strcmp(cmd->name, "flush")) {
dispatch_calls(opt, output, data, queued_cmd, nr);
free_cmds(queued_cmd, &nr);
} else if (!opt->buffer_output) {
cmd->fn(opt, p, output, data);
} else {
ALLOC_GROW(queued_cmd, nr + 1, alloc);
call.fn = cmd->fn;
call.line = xstrdup_or_null(p);
queued_cmd[nr++] = call;
}
}
if (opt->buffer_output &&
nr &&
!git_env_bool("GIT_TEST_CAT_FILE_NO_FLUSH_ON_EXIT", 0)) {
dispatch_calls(opt, output, data, queued_cmd, nr);
free_cmds(queued_cmd, &nr);
}
free_cmds(queued_cmd, &nr);
free(queued_cmd);
strbuf_release(&input);
}
#define DEFAULT_FORMAT "%(objectname) %(objecttype) %(objectsize)"
static int batch_objects(struct batch_options *opt)
{
struct strbuf input = STRBUF_INIT;
struct strbuf output = STRBUF_INIT;
struct expand_data data;
int save_warning;
int retval = 0;
/*
* Expand once with our special mark_query flag, which will prime the
* object_info to be handed to oid_object_info_extended for each
* object.
*/
memset(&data, 0, sizeof(data));
data.mark_query = 1;
expand_format(&output,
opt->format ? opt->format : DEFAULT_FORMAT,
&data);
data.mark_query = 0;
strbuf_release(&output);
if (opt->transform_mode)
data.split_on_whitespace = 1;
if (opt->format && !strcmp(opt->format, DEFAULT_FORMAT))
opt->format = NULL;
/*
* If we are printing out the object, then always fill in the type,
* since we will want to decide whether or not to stream.
*/
if (opt->batch_mode == BATCH_MODE_CONTENTS)
data.info.typep = &data.type;
if (opt->all_objects) {
struct object_cb_data cb;
struct object_info empty = OBJECT_INFO_INIT;
if (!memcmp(&data.info, &empty, sizeof(empty)))
data.skip_object_info = 1;
if (repo_has_promisor_remote(the_repository))
warning("This repository uses promisor remotes. Some objects may not be loaded.");
disable_replace_refs();
cb.opt = opt;
cb.expand = &data;
cb.scratch = &output;
if (opt->unordered) {
struct oidset seen = OIDSET_INIT;
cb.seen = &seen;
for_each_loose_object(batch_unordered_loose, &cb, 0);
for_each_packed_object(batch_unordered_packed, &cb,
FOR_EACH_OBJECT_PACK_ORDER);
oidset_clear(&seen);
} else {
struct oid_array sa = OID_ARRAY_INIT;
for_each_loose_object(collect_loose_object, &sa, 0);
for_each_packed_object(collect_packed_object, &sa, 0);
oid_array_for_each_unique(&sa, batch_object_cb, &cb);
oid_array_clear(&sa);
}
strbuf_release(&output);
return 0;
}
/*
* We are going to call get_sha1 on a potentially very large number of
* objects. In most large cases, these will be actual object sha1s. The
* cost to double-check that each one is not also a ref (just so we can
* warn) ends up dwarfing the actual cost of the object lookups
* themselves. We can work around it by just turning off the warning.
*/
save_warning = warn_on_object_refname_ambiguity;
warn_on_object_refname_ambiguity = 0;
if (opt->batch_mode == BATCH_MODE_QUEUE_AND_DISPATCH) {
batch_objects_command(opt, &output, &data);
goto cleanup;
}
while (strbuf_getdelim_strip_crlf(&input, stdin, opt->input_delim) != EOF) {
if (data.split_on_whitespace) {
/*
* Split at first whitespace, tying off the beginning
* of the string and saving the remainder (or NULL) in
* data.rest.
*/
char *p = strpbrk(input.buf, " \t");
if (p) {
while (*p && strchr(" \t", *p))
*p++ = '\0';
}
data.rest = p;
}
batch_one_object(input.buf, &output, opt, &data);
}
cleanup:
strbuf_release(&input);
strbuf_release(&output);
warn_on_object_refname_ambiguity = save_warning;
return retval;
}
static int git_cat_file_config(const char *var, const char *value,
const struct config_context *ctx, void *cb)
{
if (userdiff_config(var, value) < 0)
return -1;
return git_default_config(var, value, ctx, cb);
}
static int batch_option_callback(const struct option *opt,
const char *arg,
int unset)
{
struct batch_options *bo = opt->value;
BUG_ON_OPT_NEG(unset);
if (bo->enabled) {
return error(_("only one batch option may be specified"));
}
bo->enabled = 1;
if (!strcmp(opt->long_name, "batch"))
bo->batch_mode = BATCH_MODE_CONTENTS;
else if (!strcmp(opt->long_name, "batch-check"))
bo->batch_mode = BATCH_MODE_INFO;
else if (!strcmp(opt->long_name, "batch-command"))
bo->batch_mode = BATCH_MODE_QUEUE_AND_DISPATCH;
else
BUG("%s given to batch-option-callback", opt->long_name);
bo->format = arg;
return 0;
}
int cmd_cat_file(int argc, const char **argv, const char *prefix)
{
int opt = 0;
int opt_cw = 0;
int opt_epts = 0;
const char *exp_type = NULL, *obj_name = NULL;
struct batch_options batch = {0};
int unknown_type = 0;
int input_nul_terminated = 0;
int nul_terminated = 0;
const char * const usage[] = {
N_("git cat-file <type> <object>"),
N_("git cat-file (-e | -p) <object>"),
N_("git cat-file (-t | -s) [--allow-unknown-type] <object>"),
N_("git cat-file (--textconv | --filters)\n"
" [<rev>:<path|tree-ish> | --path=<path|tree-ish> <rev>]"),
N_("git cat-file (--batch | --batch-check | --batch-command) [--batch-all-objects]\n"
" [--buffer] [--follow-symlinks] [--unordered]\n"
" [--textconv | --filters] [-Z]"),
NULL
};
const struct option options[] = {
/* Simple queries */
OPT_GROUP(N_("Check object existence or emit object contents")),
OPT_CMDMODE('e', NULL, &opt,
N_("check if <object> exists"), 'e'),
OPT_CMDMODE('p', NULL, &opt, N_("pretty-print <object> content"), 'p'),
OPT_GROUP(N_("Emit [broken] object attributes")),
OPT_CMDMODE('t', NULL, &opt, N_("show object type (one of 'blob', 'tree', 'commit', 'tag', ...)"), 't'),
OPT_CMDMODE('s', NULL, &opt, N_("show object size"), 's'),
OPT_BOOL(0, "allow-unknown-type", &unknown_type,
N_("allow -s and -t to work with broken/corrupt objects")),
OPT_BOOL(0, "use-mailmap", &use_mailmap, N_("use mail map file")),
OPT_ALIAS(0, "mailmap", "use-mailmap"),
/* Batch mode */
OPT_GROUP(N_("Batch objects requested on stdin (or --batch-all-objects)")),
OPT_CALLBACK_F(0, "batch", &batch, N_("format"),
N_("show full <object> or <rev> contents"),
PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
batch_option_callback),
OPT_CALLBACK_F(0, "batch-check", &batch, N_("format"),
N_("like --batch, but don't emit <contents>"),
PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
batch_option_callback),
OPT_BOOL_F('z', NULL, &input_nul_terminated, N_("stdin is NUL-terminated"),
PARSE_OPT_HIDDEN),
OPT_BOOL('Z', NULL, &nul_terminated, N_("stdin and stdout is NUL-terminated")),
OPT_CALLBACK_F(0, "batch-command", &batch, N_("format"),
N_("read commands from stdin"),
PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
batch_option_callback),
OPT_CMDMODE(0, "batch-all-objects", &opt,
N_("with --batch[-check]: ignores stdin, batches all known objects"), 'b'),
/* Batch-specific options */
OPT_GROUP(N_("Change or optimize batch output")),
OPT_BOOL(0, "buffer", &batch.buffer_output, N_("buffer --batch output")),
OPT_BOOL(0, "follow-symlinks", &batch.follow_symlinks,
N_("follow in-tree symlinks")),
OPT_BOOL(0, "unordered", &batch.unordered,
N_("do not order objects before emitting them")),
/* Textconv options, stand-ole*/
OPT_GROUP(N_("Emit object (blob or tree) with conversion or filter (stand-alone, or with batch)")),
OPT_CMDMODE(0, "textconv", &opt,
N_("run textconv on object's content"), 'c'),
OPT_CMDMODE(0, "filters", &opt,
N_("run filters on object's content"), 'w'),
OPT_STRING(0, "path", &force_path, N_("blob|tree"),
N_("use a <path> for (--textconv | --filters); Not with 'batch'")),
OPT_END()
};
git_config(git_cat_file_config, NULL);
batch.buffer_output = -1;
argc = parse_options(argc, argv, prefix, options, usage, 0);
opt_cw = (opt == 'c' || opt == 'w');
opt_epts = (opt == 'e' || opt == 'p' || opt == 't' || opt == 's');
if (use_mailmap)
read_mailmap(&mailmap);
/* --batch-all-objects? */
if (opt == 'b')
batch.all_objects = 1;
/* Option compatibility */
if (force_path && !opt_cw)
usage_msg_optf(_("'%s=<%s>' needs '%s' or '%s'"),
usage, options,
"--path", _("path|tree-ish"), "--filters",
"--textconv");
/* Option compatibility with batch mode */
if (batch.enabled)
;
else if (batch.follow_symlinks)
usage_msg_optf(_("'%s' requires a batch mode"), usage, options,
"--follow-symlinks");
else if (batch.buffer_output >= 0)
usage_msg_optf(_("'%s' requires a batch mode"), usage, options,
"--buffer");
else if (batch.all_objects)
usage_msg_optf(_("'%s' requires a batch mode"), usage, options,
"--batch-all-objects");
else if (input_nul_terminated)
usage_msg_optf(_("'%s' requires a batch mode"), usage, options,
"-z");
else if (nul_terminated)
usage_msg_optf(_("'%s' requires a batch mode"), usage, options,
"-Z");
batch.input_delim = batch.output_delim = '\n';
if (input_nul_terminated)
batch.input_delim = '\0';
if (nul_terminated)
batch.input_delim = batch.output_delim = '\0';
/* Batch defaults */
if (batch.buffer_output < 0)
batch.buffer_output = batch.all_objects;
prepare_repo_settings(the_repository);
the_repository->settings.command_requires_full_index = 0;
/* Return early if we're in batch mode? */
if (batch.enabled) {
if (opt_cw)
batch.transform_mode = opt;
else if (opt && opt != 'b')
usage_msg_optf(_("'-%c' is incompatible with batch mode"),
usage, options, opt);
else if (argc)
usage_msg_opt(_("batch modes take no arguments"), usage,
options);
return batch_objects(&batch);
}
if (opt) {
if (!argc && opt == 'c')
usage_msg_optf(_("<rev> required with '%s'"),
usage, options, "--textconv");
else if (!argc && opt == 'w')
usage_msg_optf(_("<rev> required with '%s'"),
usage, options, "--filters");
else if (!argc && opt_epts)
usage_msg_optf(_("<object> required with '-%c'"),
usage, options, opt);
else if (argc == 1)
obj_name = argv[0];
else
usage_msg_opt(_("too many arguments"), usage, options);
} else if (!argc) {
usage_with_options(usage, options);
} else if (argc != 2) {
usage_msg_optf(_("only two arguments allowed in <type> <object> mode, not %d"),
usage, options, argc);
} else if (argc) {
exp_type = argv[0];
obj_name = argv[1];
}
if (unknown_type && opt != 't' && opt != 's')
die("git cat-file --allow-unknown-type: use with -s or -t");
return cat_one_file(opt, exp_type, obj_name, unknown_type);
}
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