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Merge branch 'rs/tar-tree' into next 

* rs/tar-tree:
  tar-tree: Use the prefix field of a tar header
  tar-tree: Remove obsolete code
  tar-tree: Use write_entry() to write the archive contents
  tar-tree: Introduce write_entry()
  tar-tree: Use SHA1 of root tree for the basedir
  git-apply: safety fixes
  Removed bogus "<snap>" identifier.
  Clarify and expand some hook documentation.
  commit-tree: check return value from write_sha1_file()
  send-email: Identify author at the top when sending e-mail
  Format tweaks for asciidoc.
maint
Junio C Hamano 2006-03-25 17:43:22 -08:00
parent 88d9405600 4c691724f1
commit 48d6e97afe
11 changed files with 274 additions and 270 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Documentation/git-grep.txt
View File

@ -24,13 +24,13 @@ OPTIONS


<option>...:: <option>...::
Either an option to pass to `grep` or `git-ls-files`. Either an option to pass to `grep` or `git-ls-files`.

+
The following are the specific `git-ls-files` options The following are the specific `git-ls-files` options
that may be given: `-o`, `--cached`, `--deleted`, `--others`, that may be given: `-o`, `--cached`, `--deleted`, `--others`,
`--killed`, `--ignored`, `--modified`, `--exclude=*`, `--killed`, `--ignored`, `--modified`, `--exclude=\*`,
`--exclude-from=*`, and `--exclude-per-directory=*`. `--exclude-from=\*`, and `--exclude-per-directory=\*`.

+
All other options will be passed to `grep`. All other options will be passed to `grep`.


<pattern>:: <pattern>::
The pattern to look for. The first non option is taken The pattern to look for. The first non option is taken

6
Documentation/git-whatchanged.txt
View File

@ -47,9 +47,9 @@ OPTIONS
By default, differences for merge commits are not shown. By default, differences for merge commits are not shown.
With this flag, show differences to that commit from all With this flag, show differences to that commit from all
of its parents. of its parents.

+
However, it is not very useful in general, although it However, it is not very useful in general, although it
*is* useful on a file-by-file basis. *is* useful on a file-by-file basis.


Examples Examples
-------- --------

6
Documentation/git.txt
View File

@ -521,16 +521,14 @@ HEAD::
a valid head 'name' a valid head 'name'
(i.e. the contents of `$GIT_DIR/refs/heads/<head>`). (i.e. the contents of `$GIT_DIR/refs/heads/<head>`).


<snap>::
a valid snapshot 'name'
(i.e. the contents of `$GIT_DIR/refs/snap/<snap>`).



File/Directory Structure File/Directory Structure
------------------------ ------------------------


Please see link:repository-layout.html[repository layout] document. Please see link:repository-layout.html[repository layout] document.


Read link:hooks.html[hooks] for more details about each hook.

Higher level SCMs may provide and manage additional information in the Higher level SCMs may provide and manage additional information in the
`$GIT_DIR`. `$GIT_DIR`.



49
Documentation/hooks.txt
View File

@ -97,16 +97,31 @@ send out a commit notification e-mail.
update update
------ ------


This hook is invoked by `git-receive-pack`, which is invoked This hook is invoked by `git-receive-pack` on the remote repository,
when a `git push` is done against the repository. It takes which is happens when a `git push` is done on a local repository.
three parameters, name of the ref being updated, old object name Just before updating the ref on the remote repository, the update hook
stored in the ref, and the new objectname to be stored in the is invoked. It's exit status determins the success or failure of
ref. Exiting with non-zero status from this hook prevents the ref update.
`git-receive-pack` from updating the ref.


This can be used to prevent 'forced' update on certain refs by The hook executes once for each ref to be updated, and takes
three parameters:
- the name of the ref being updated,
- the old object name stored in the ref,
- and the new objectname to be stored in the ref.

A zero exit from the update hook allows the ref to be updated.
Exiting with a non-zero status prevents `git-receive-pack`
from updating the ref.

This hook can be used to prevent 'forced' update on certain refs by
making sure that the object name is a commit object that is a making sure that the object name is a commit object that is a
descendant of the commit object named by the old object name. descendant of the commit object named by the old object name.
That is, to enforce a "fast forward only" policy.

It could also be used to log the old..new status. However, it
does not know the entire set of branches, so it would end up
firing one e-mail per ref when used naively, though.

Another use suggested on the mailing list is to use this hook to Another use suggested on the mailing list is to use this hook to
implement access control which is finer grained than the one implement access control which is finer grained than the one
based on filesystem group. based on filesystem group.
@ -115,20 +130,30 @@ The standard output of this hook is sent to /dev/null; if you
want to report something to the git-send-pack on the other end, want to report something to the git-send-pack on the other end,
you can redirect your output to your stderr. you can redirect your output to your stderr.



post-update post-update
----------- -----------


This hook is invoked by `git-receive-pack`, which is invoked This hook is invoked by `git-receive-pack` on the remote repository,
when a `git push` is done against the repository. It takes which is happens when a `git push` is done on a local repository.
variable number of parameters; each of which is the name of ref It executes on the remote repository once after all the refs have
that was actually updated. been updated.

It takes a variable number of parameters, each of which is the
name of ref that was actually updated.


This hook is meant primarily for notification, and cannot affect This hook is meant primarily for notification, and cannot affect
the outcome of `git-receive-pack`. the outcome of `git-receive-pack`.


The post-update hook can tell what are the heads that were pushed,
but it does not know what their original and updated values are,
so it is a poor place to do log old..new.

The default post-update hook, when enabled, runs The default post-update hook, when enabled, runs
`git-update-server-info` to keep the information used by dumb `git-update-server-info` to keep the information used by dumb
transport up-to-date. transports (eg, http) up-to-date. If you are publishing
a git repository that is accessible via http, you should
probably enable this hook.


The standard output of this hook is sent to /dev/null; if you The standard output of this hook is sent to /dev/null; if you
want to report something to the git-send-pack on the other end, want to report something to the git-send-pack on the other end,

2
Documentation/repository-layout.txt
View File

@ -89,6 +89,8 @@ hooks::
commands. A handful of sample hooks are installed when commands. A handful of sample hooks are installed when
`git init-db` is run, but all of them are disabled by `git init-db` is run, but all of them are disabled by
default. To enable, they need to be made executable. default. To enable, they need to be made executable.
Read link:hooks.html[hooks] for more details about
each hook.


index:: index::
The current index file for the repository. It is The current index file for the repository. It is

4
apply.c
View File

@ -693,7 +693,7 @@ static int parse_range(const char *line, int len, int offset, const char *expect
line += digits; line += digits;
len -= digits; len -= digits;


*p2 = *p1; *p2 = 1;
if (*line == ',') { if (*line == ',') {
digits = parse_num(line+1, p2); digits = parse_num(line+1, p2);
if (!digits) if (!digits)
@ -901,6 +901,8 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s
break; break;
} }
} }
if (oldlines || newlines)
return -1;
/* If a fragment ends with an incomplete line, we failed to include /* If a fragment ends with an incomplete line, we failed to include
* it in the above loop because we hit oldlines == newlines == 0 * it in the above loop because we hit oldlines == newlines == 0
* before seeing it. * before seeing it.

9
commit-tree.c
View File

@ -125,7 +125,10 @@ int main(int argc, char **argv)
while (fgets(comment, sizeof(comment), stdin) != NULL) while (fgets(comment, sizeof(comment), stdin) != NULL)
add_buffer(&buffer, &size, "%s", comment); add_buffer(&buffer, &size, "%s", comment);


write_sha1_file(buffer, size, "commit", commit_sha1); if (!write_sha1_file(buffer, size, "commit", commit_sha1)) {
printf("%s\n", sha1_to_hex(commit_sha1)); printf("%s\n", sha1_to_hex(commit_sha1));
return 0; return 0;
}
else
return 1;
} }

11
git-send-email.perl
View File

@ -307,6 +307,7 @@ $subject = $initial_subject;
foreach my $t (@files) { foreach my $t (@files) {
open(F,"<",$t) or die "can't open file $t"; open(F,"<",$t) or die "can't open file $t";


my $author_not_sender = undef;
@cc = @initial_cc; @cc = @initial_cc;
my $found_mbox = 0; my $found_mbox = 0;
my $header_done = 0; my $header_done = 0;
@ -321,7 +322,12 @@ foreach my $t (@files) {
$subject = $1; $subject = $1;


} elsif (/^(Cc|From):\s+(.*)$/) { } elsif (/^(Cc|From):\s+(.*)$/) {
next if ($2 eq $from && $suppress_from); if ($2 eq $from) {
next if ($suppress_from);
}
else {
$author_not_sender = $2;
}
printf("(mbox) Adding cc: %s from line '%s'\n", printf("(mbox) Adding cc: %s from line '%s'\n",
$2, $_) unless $quiet; $2, $_) unless $quiet;
push @cc, $2; push @cc, $2;
@ -360,6 +366,9 @@ foreach my $t (@files) {
} }
} }
close F; close F;
if (defined $author_not_sender) {
$message = "From: $author_not_sender\n\n$message";
}


$cc = join(", ", unique_email_list(@cc)); $cc = join(", ", unique_email_list(@cc));



3
t/t5000-tar-tree.sh
View File

@ -34,6 +34,9 @@ test_expect_success \
mkdir a/bin && mkdir a/bin &&
cp /bin/sh a/bin && cp /bin/sh a/bin &&
ln -s a a/l1 && ln -s a a/l1 &&
(p=long_path_to_a_file && cd a &&
for depth in 1 2 3 4 5; do mkdir $p && cd $p; done &&
echo text >file_with_long_path) &&
(cd a && find .) | sort >a.lst' (cd a && find .) | sort >a.lst'


test_expect_success \ test_expect_success \

415
tar-tree.c
View File

@ -1,37 +1,23 @@
/* /*
* Copyright (c) 2005 Rene Scharfe * Copyright (c) 2005, 2006 Rene Scharfe
*/ */
#include <time.h> #include <time.h>
#include "cache.h" #include "cache.h"
#include "diff.h" #include "diff.h"
#include "commit.h" #include "commit.h"
#include "strbuf.h"
#include "tar.h"


#define RECORDSIZE (512) #define RECORDSIZE (512)
#define BLOCKSIZE (RECORDSIZE * 20) #define BLOCKSIZE (RECORDSIZE * 20)


#define TYPEFLAG_AUTO '\0'
#define TYPEFLAG_REG '0'
#define TYPEFLAG_LNK '2'
#define TYPEFLAG_DIR '5'
#define TYPEFLAG_GLOBAL_HEADER 'g'
#define TYPEFLAG_EXT_HEADER 'x'

#define EXT_HEADER_PATH 1
#define EXT_HEADER_LINKPATH 2

static const char tar_tree_usage[] = "git-tar-tree <key> [basedir]"; static const char tar_tree_usage[] = "git-tar-tree <key> [basedir]";


static char block[BLOCKSIZE]; static char block[BLOCKSIZE];
static unsigned long offset; static unsigned long offset;


static const char *basedir;
static time_t archive_time; static time_t archive_time;


struct path_prefix {
struct path_prefix *prev;
const char *name;
};

/* tries hard to write, either succeeds or dies in the attempt */ /* tries hard to write, either succeeds or dies in the attempt */
static void reliable_write(void *buf, unsigned long size) static void reliable_write(void *buf, unsigned long size)
{ {
@ -119,230 +105,170 @@ static void write_blocked(void *buf, unsigned long size)
write_if_needed(); write_if_needed();
} }


static void append_string(char **p, const char *s) static void strbuf_append_string(struct strbuf *sb, const char *s)
{ {
unsigned int len = strlen(s); int slen = strlen(s);
memcpy(*p, s, len); int total = sb->len + slen;
*p += len; if (total > sb->alloc) {
} sb->buf = xrealloc(sb->buf, total);

sb->alloc = total;
static void append_char(char **p, char c)
{
**p = c;
*p += 1;
}

static void append_path_prefix(char **buffer, struct path_prefix *prefix)
{
if (!prefix)
return;
append_path_prefix(buffer, prefix->prev);
append_string(buffer, prefix->name);
append_char(buffer, '/');
}

static unsigned int path_prefix_len(struct path_prefix *prefix)
{
if (!prefix)
return 0;
return path_prefix_len(prefix->prev) + strlen(prefix->name) + 1;
}

static void append_path(char **p, int is_dir, const char *basepath,
struct path_prefix *prefix, const char *path)
{
if (basepath) {
append_string(p, basepath);
append_char(p, '/');
} }
append_path_prefix(p, prefix); memcpy(sb->buf + sb->len, s, slen);
append_string(p, path); sb->len = total;
if (is_dir)
append_char(p, '/');
} }


static unsigned int path_len(int is_dir, const char *basepath, /*
struct path_prefix *prefix, const char *path) * pax extended header records have the format "%u %s=%s\n". %u contains
* the size of the whole string (including the %u), the first %s is the
* keyword, the second one is the value. This function constructs such a
* string and appends it to a struct strbuf.
*/
static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword,
const char *value, unsigned int valuelen)
{ {
unsigned int len = 0; char *p;
if (basepath) int len, total, tmp;
len += strlen(basepath) + 1;
len += path_prefix_len(prefix) + strlen(path);
if (is_dir)
len++;
return len;
}


static void append_extended_header_prefix(char **p, unsigned int size,
const char *keyword)
{
int len = sprintf(*p, "%u %s=", size, keyword);
*p += len;
}

static unsigned int extended_header_len(const char *keyword,
unsigned int valuelen)
{
/* "%u %s=%s\n" */ /* "%u %s=%s\n" */
unsigned int len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1; len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1;
if (len > 9) for (tmp = len; tmp > 9; tmp /= 10)
len++; len++;
if (len > 99)
len++;
return len;
}


static void append_extended_header(char **p, const char *keyword, total = sb->len + len;
const char *value, unsigned int len) if (total > sb->alloc) {
{ sb->buf = xrealloc(sb->buf, total);
unsigned int size = extended_header_len(keyword, len); sb->alloc = total;
append_extended_header_prefix(p, size, keyword);
memcpy(*p, value, len);
*p += len;
append_char(p, '\n');
}

static void write_header(const unsigned char *, char, const char *, struct path_prefix *,
const char *, unsigned int, void *, unsigned long);

/* stores a pax extended header directly in the block buffer */
static void write_extended_header(const char *headerfilename, int is_dir,
unsigned int flags, const char *basepath,
struct path_prefix *prefix,
const char *path, unsigned int namelen,
void *content, unsigned int contentsize)
{
char *buffer, *p;
unsigned int pathlen, size, linkpathlen = 0;

size = pathlen = extended_header_len("path", namelen);
if (flags & EXT_HEADER_LINKPATH) {
linkpathlen = extended_header_len("linkpath", contentsize);
size += linkpathlen;
} }
write_header(NULL, TYPEFLAG_EXT_HEADER, NULL, NULL, headerfilename,
0100600, NULL, size);


buffer = p = malloc(size); p = sb->buf;
if (!buffer) p += sprintf(p, "%u %s=", len, keyword);
die("git-tar-tree: %s", strerror(errno)); memcpy(p, value, valuelen);
append_extended_header_prefix(&p, pathlen, "path"); p += valuelen;
append_path(&p, is_dir, basepath, prefix, path); *p = '\n';
append_char(&p, '\n'); sb->len = total;
if (flags & EXT_HEADER_LINKPATH) }
append_extended_header(&p, "linkpath", content, contentsize);
write_blocked(buffer, size); static unsigned int ustar_header_chksum(const struct ustar_header *header)
free(buffer); {
char *p = (char *)header;
unsigned int chksum = 0;
while (p < header->chksum)
chksum += *p++;
chksum += sizeof(header->chksum) * ' ';
p += sizeof(header->chksum);
while (p < (char *)header + sizeof(struct ustar_header))
chksum += *p++;
return chksum;
}

static int get_path_prefix(const struct strbuf *path, int maxlen)
{
int i = path->len;
if (i > maxlen)
i = maxlen;
while (i > 0 && path->buf[i] != '/')
i--;
return i;
}

static void write_entry(const unsigned char *sha1, struct strbuf *path,
unsigned int mode, void *buffer, unsigned long size)
{
struct ustar_header header;
struct strbuf ext_header;

memset(&header, 0, sizeof(header));
ext_header.buf = NULL;
ext_header.len = ext_header.alloc = 0;

if (!sha1) {
*header.typeflag = TYPEFLAG_GLOBAL_HEADER;
mode = 0100666;
strcpy(header.name, "pax_global_header");
} else if (!path) {
*header.typeflag = TYPEFLAG_EXT_HEADER;
mode = 0100666;
sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1));
} else {
if (S_ISDIR(mode)) {
*header.typeflag = TYPEFLAG_DIR;
mode |= 0777;
} else if (S_ISLNK(mode)) {
*header.typeflag = TYPEFLAG_LNK;
mode |= 0777;
} else if (S_ISREG(mode)) {
*header.typeflag = TYPEFLAG_REG;
mode |= (mode & 0100) ? 0777 : 0666;
} else {
error("unsupported file mode: 0%o (SHA1: %s)",
mode, sha1_to_hex(sha1));
return;
}
if (path->len > sizeof(header.name)) {
int plen = get_path_prefix(path, sizeof(header.prefix));
int rest = path->len - plen - 1;
if (plen > 0 && rest <= sizeof(header.name)) {
memcpy(header.prefix, path->buf, plen);
memcpy(header.name, path->buf + plen + 1, rest);
} else {
sprintf(header.name, "%s.data",
sha1_to_hex(sha1));
strbuf_append_ext_header(&ext_header, "path",
path->buf, path->len);
}
} else
memcpy(header.name, path->buf, path->len);
}

if (S_ISLNK(mode) && buffer) {
if (size > sizeof(header.linkname)) {
sprintf(header.linkname, "see %s.paxheader",
sha1_to_hex(sha1));
strbuf_append_ext_header(&ext_header, "linkpath",
buffer, size);
} else
memcpy(header.linkname, buffer, size);
}

sprintf(header.mode, "%07o", mode & 07777);
sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0);
sprintf(header.mtime, "%011lo", archive_time);

/* XXX: should we provide more meaningful info here? */
sprintf(header.uid, "%07o", 0);
sprintf(header.gid, "%07o", 0);
strncpy(header.uname, "git", 31);
strncpy(header.gname, "git", 31);
sprintf(header.devmajor, "%07o", 0);
sprintf(header.devminor, "%07o", 0);

memcpy(header.magic, "ustar", 6);
memcpy(header.version, "00", 2);

sprintf(header.chksum, "%07o", ustar_header_chksum(&header));

if (ext_header.len > 0) {
write_entry(sha1, NULL, 0, ext_header.buf, ext_header.len);
free(ext_header.buf);
}
write_blocked(&header, sizeof(header));
if (S_ISREG(mode) && buffer && size > 0)
write_blocked(buffer, size);
} }


static void write_global_extended_header(const unsigned char *sha1) static void write_global_extended_header(const unsigned char *sha1)
{ {
char *p; struct strbuf ext_header;
unsigned int size; ext_header.buf = NULL;

ext_header.len = ext_header.alloc = 0;
size = extended_header_len("comment", 40); strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);
write_header(NULL, TYPEFLAG_GLOBAL_HEADER, NULL, NULL, write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len);
"pax_global_header", 0100600, NULL, size); free(ext_header.buf);

p = get_record();
append_extended_header(&p, "comment", sha1_to_hex(sha1), 40);
write_if_needed();
} }


/* stores a ustar header directly in the block buffer */ static void traverse_tree(struct tree_desc *tree, struct strbuf *path)
static void write_header(const unsigned char *sha1, char typeflag, const char *basepath,
struct path_prefix *prefix, const char *path,
unsigned int mode, void *buffer, unsigned long size)
{ {
unsigned int namelen; int pathlen = path->len;
char *header = NULL;
unsigned int checksum = 0;
int i;
unsigned int ext_header = 0;

if (typeflag == TYPEFLAG_AUTO) {
if (S_ISDIR(mode))
typeflag = TYPEFLAG_DIR;
else if (S_ISLNK(mode))
typeflag = TYPEFLAG_LNK;
else
typeflag = TYPEFLAG_REG;
}

namelen = path_len(S_ISDIR(mode), basepath, prefix, path);
if (namelen > 100)
ext_header |= EXT_HEADER_PATH;
if (typeflag == TYPEFLAG_LNK && size > 100)
ext_header |= EXT_HEADER_LINKPATH;

/* the extended header must be written before the normal one */
if (ext_header) {
char headerfilename[51];
sprintf(headerfilename, "%s.paxheader", sha1_to_hex(sha1));
write_extended_header(headerfilename, S_ISDIR(mode),
ext_header, basepath, prefix, path,
namelen, buffer, size);
}

header = get_record();

if (ext_header) {
sprintf(header, "%s.data", sha1_to_hex(sha1));
} else {
char *p = header;
append_path(&p, S_ISDIR(mode), basepath, prefix, path);
}

if (typeflag == TYPEFLAG_LNK) {
if (ext_header & EXT_HEADER_LINKPATH) {
sprintf(&header[157], "see %s.paxheader",
sha1_to_hex(sha1));
} else {
if (buffer)
strncpy(&header[157], buffer, size);
}
}

if (S_ISDIR(mode))
mode |= 0777;
else if (S_ISREG(mode))
mode |= (mode & 0100) ? 0777 : 0666;
else if (S_ISLNK(mode))
mode |= 0777;
sprintf(&header[100], "%07o", mode & 07777);

/* XXX: should we provide more meaningful info here? */
sprintf(&header[108], "%07o", 0); /* uid */
sprintf(&header[116], "%07o", 0); /* gid */
strncpy(&header[265], "git", 31); /* uname */
strncpy(&header[297], "git", 31); /* gname */

if (S_ISDIR(mode) || S_ISLNK(mode))
size = 0;
sprintf(&header[124], "%011lo", size);
sprintf(&header[136], "%011lo", archive_time);

header[156] = typeflag;

memcpy(&header[257], "ustar", 6);
memcpy(&header[263], "00", 2);

sprintf(&header[329], "%07o", 0); /* devmajor */
sprintf(&header[337], "%07o", 0); /* devminor */

memset(&header[148], ' ', 8);
for (i = 0; i < RECORDSIZE; i++)
checksum += header[i];
sprintf(&header[148], "%07o", checksum & 0x1fffff);

write_if_needed();
}

static void traverse_tree(struct tree_desc *tree,
struct path_prefix *prefix)
{
struct path_prefix this_prefix;
this_prefix.prev = prefix;


while (tree->size) { while (tree->size) {
const char *name; const char *name;
@ -358,16 +284,19 @@ static void traverse_tree(struct tree_desc *tree,
eltbuf = read_sha1_file(sha1, elttype, &eltsize); eltbuf = read_sha1_file(sha1, elttype, &eltsize);
if (!eltbuf) if (!eltbuf)
die("cannot read %s", sha1_to_hex(sha1)); die("cannot read %s", sha1_to_hex(sha1));
write_header(sha1, TYPEFLAG_AUTO, basedir,
prefix, name, mode, eltbuf, eltsize); path->len = pathlen;
strbuf_append_string(path, name);
if (S_ISDIR(mode))
strbuf_append_string(path, "/");

write_entry(sha1, path, mode, eltbuf, eltsize);

if (S_ISDIR(mode)) { if (S_ISDIR(mode)) {
struct tree_desc subtree; struct tree_desc subtree;
subtree.buf = eltbuf; subtree.buf = eltbuf;
subtree.size = eltsize; subtree.size = eltsize;
this_prefix.name = name; traverse_tree(&subtree, path);
traverse_tree(&subtree, &this_prefix);
} else if (!S_ISLNK(mode)) {
write_blocked(eltbuf, eltsize);
} }
free(eltbuf); free(eltbuf);
} }
@ -375,16 +304,22 @@ static void traverse_tree(struct tree_desc *tree,


int main(int argc, char **argv) int main(int argc, char **argv)
{ {
unsigned char sha1[20]; unsigned char sha1[20], tree_sha1[20];
struct commit *commit; struct commit *commit;
struct tree_desc tree; struct tree_desc tree;
struct strbuf current_path;

current_path.buf = xmalloc(PATH_MAX);
current_path.alloc = PATH_MAX;
current_path.len = current_path.eof = 0;


setup_git_directory(); setup_git_directory();
git_config(git_default_config); git_config(git_default_config);


switch (argc) { switch (argc) {
case 3: case 3:
basedir = argv[2]; strbuf_append_string(&current_path, argv[2]);
strbuf_append_string(&current_path, "/");
/* FALLTHROUGH */ /* FALLTHROUGH */
case 2: case 2:
if (get_sha1(argv[1], sha1) < 0) if (get_sha1(argv[1], sha1) < 0)
@ -398,17 +333,19 @@ int main(int argc, char **argv)
if (commit) { if (commit) {
write_global_extended_header(commit->object.sha1); write_global_extended_header(commit->object.sha1);
archive_time = commit->date; archive_time = commit->date;
} } else
tree.buf = read_object_with_reference(sha1, "tree", &tree.size, NULL); archive_time = time(NULL);

tree.buf = read_object_with_reference(sha1, "tree", &tree.size,
tree_sha1);
if (!tree.buf) if (!tree.buf)
die("not a reference to a tag, commit or tree object: %s", die("not a reference to a tag, commit or tree object: %s",
sha1_to_hex(sha1)); sha1_to_hex(sha1));
if (!archive_time)
archive_time = time(NULL); if (current_path.len > 0)
if (basedir) write_entry(tree_sha1, &current_path, 040777, NULL, 0);
write_header((unsigned char *)"0", TYPEFLAG_DIR, NULL, NULL, traverse_tree(&tree, &current_path);
basedir, 040777, NULL, 0);
traverse_tree(&tree, NULL);
write_trailer(); write_trailer();
free(current_path.buf);
return 0; return 0;
} }

25
tar.h Normal file
View File

@ -0,0 +1,25 @@
#define TYPEFLAG_AUTO '\0'
#define TYPEFLAG_REG '0'
#define TYPEFLAG_LNK '2'
#define TYPEFLAG_DIR '5'
#define TYPEFLAG_GLOBAL_HEADER 'g'
#define TYPEFLAG_EXT_HEADER 'x'

struct ustar_header {
char name[100]; /* 0 */
char mode[8]; /* 100 */
char uid[8]; /* 108 */
char gid[8]; /* 116 */
char size[12]; /* 124 */
char mtime[12]; /* 136 */
char chksum[8]; /* 148 */
char typeflag[1]; /* 156 */
char linkname[100]; /* 157 */
char magic[6]; /* 257 */
char version[2]; /* 263 */
char uname[32]; /* 265 */
char gname[32]; /* 297 */
char devmajor[8]; /* 329 */
char devminor[8]; /* 337 */
char prefix[155]; /* 345 */
};