git-tar-tree: Move code for git-archive --format=tar to archive-tar.c

This patch doesn't change any functionality, it only moves code around.  It
makes seeing the few remaining lines of git-tar-tree code easier. ;-)

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 0 insertions, 313 deletions

diff --git a/builtin-tar-tree.c b/builtin-tar-tree.c
index 82b4951f3..aa370e3ec 100644
--- a/builtin-tar-tree.c
+++ b/builtin-tar-tree.c
@@ -4,7 +4,6 @@
 #include <time.h>
 #include "cache.h"
 #include "commit.h"
-#include "strbuf.h"
 #include "tar.h"
 #include "builtin.h"
 #include "pkt-line.h"
@@ -16,251 +15,6 @@
 static const char tar_tree_usage[] =
 "git-tar-tree [--remote=<repo>] <tree-ish> [basedir]";
 
-static char block[BLOCKSIZE];
-static unsigned long offset;
-
-static time_t archive_time;
-static int tar_umask;
-static int verbose;
-
-/* writes out the whole block, but only if it is full */
-static void write_if_needed(void)
-{
-	if (offset == BLOCKSIZE) {
-		write_or_die(1, block, BLOCKSIZE);
-		offset = 0;
-	}
-}
-
-/*
- * queues up writes, so that all our write(2) calls write exactly one
- * full block; pads writes to RECORDSIZE
- */
-static void write_blocked(const void *data, unsigned long size)
-{
-	const char *buf = data;
-	unsigned long tail;
-
-	if (offset) {
-		unsigned long chunk = BLOCKSIZE - offset;
-		if (size < chunk)
-			chunk = size;
-		memcpy(block + offset, buf, chunk);
-		size -= chunk;
-		offset += chunk;
-		buf += chunk;
-		write_if_needed();
-	}
-	while (size >= BLOCKSIZE) {
-		write_or_die(1, buf, BLOCKSIZE);
-		size -= BLOCKSIZE;
-		buf += BLOCKSIZE;
-	}
-	if (size) {
-		memcpy(block + offset, buf, size);
-		offset += size;
-	}
-	tail = offset % RECORDSIZE;
-	if (tail)  {
-		memset(block + offset, 0, RECORDSIZE - tail);
-		offset += RECORDSIZE - tail;
-	}
-	write_if_needed();
-}
-
-/*
- * The end of tar archives is marked by 2*512 nul bytes and after that
- * follows the rest of the block (if any).
- */
-static void write_trailer(void)
-{
-	int tail = BLOCKSIZE - offset;
-	memset(block + offset, 0, tail);
-	write_or_die(1, block, BLOCKSIZE);
-	if (tail < 2 * RECORDSIZE) {
-		memset(block, 0, offset);
-		write_or_die(1, block, BLOCKSIZE);
-	}
-}
-
-static void strbuf_append_string(struct strbuf *sb, const char *s)
-{
-	int slen = strlen(s);
-	int total = sb->len + slen;
-	if (total > sb->alloc) {
-		sb->buf = xrealloc(sb->buf, total);
-		sb->alloc = total;
-	}
-	memcpy(sb->buf + sb->len, s, slen);
-	sb->len = total;
-}
-
-/*
- * 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)
-{
-	char *p;
-	int len, total, tmp;
-
-	/* "%u %s=%s\n" */
-	len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1;
-	for (tmp = len; tmp > 9; tmp /= 10)
-		len++;
-
-	total = sb->len + len;
-	if (total > sb->alloc) {
-		sb->buf = xrealloc(sb->buf, total);
-		sb->alloc = total;
-	}
-
-	p = sb->buf;
-	p += sprintf(p, "%u %s=", len, keyword);
-	memcpy(p, value, valuelen);
-	p += valuelen;
-	*p = '\n';
-	sb->len = total;
-}
-
-static unsigned int ustar_header_chksum(const struct ustar_header *header)
-{
-	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;
-	do {
-		i--;
-	} while (i > 0 && path->buf[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 (verbose)
-			fprintf(stderr, "%.*s\n", path->len, path->buf);
-		if (S_ISDIR(mode)) {
-			*header.typeflag = TYPEFLAG_DIR;
-			mode = (mode | 0777) & ~tar_umask;
-		} else if (S_ISLNK(mode)) {
-			*header.typeflag = TYPEFLAG_LNK;
-			mode |= 0777;
-		} else if (S_ISREG(mode)) {
-			*header.typeflag = TYPEFLAG_REG;
-			mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask;
-		} 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);
-	strlcpy(header.uname, "git", sizeof(header.uname));
-	strlcpy(header.gname, "git", sizeof(header.gname));
-	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)
-{
-	struct strbuf ext_header;
-	ext_header.buf = NULL;
-	ext_header.len = ext_header.alloc = 0;
-	strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);
-	write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len);
-	free(ext_header.buf);
-}
-
-static int git_tar_config(const char *var, const char *value)
-{
-	if (!strcmp(var, "tar.umask")) {
-		if (!strcmp(value, "user")) {
-			tar_umask = umask(0);
-			umask(tar_umask);
-		} else {
-			tar_umask = git_config_int(var, value);
-		}
-		return 0;
-	}
-	return git_default_config(var, value);
-}
-
 static int generate_tar(int argc, const char **argv, const char *prefix)
 {
 	struct archiver_args args;
@@ -286,73 +40,6 @@ static int generate_tar(int argc, const char **argv, const char *prefix)
 	return result;
 }
 
-static int write_tar_entry(const unsigned char *sha1,
-                           const char *base, int baselen,
-                           const char *filename, unsigned mode, int stage)
-{
-	static struct strbuf path;
-	int filenamelen = strlen(filename);
-	void *buffer;
-	char type[20];
-	unsigned long size;
-
-	if (!path.alloc) {
-		path.buf = xmalloc(PATH_MAX);
-		path.alloc = PATH_MAX;
-		path.len = path.eof = 0;
-	}
-	if (path.alloc < baselen + filenamelen) {
-		free(path.buf);
-		path.buf = xmalloc(baselen + filenamelen);
-		path.alloc = baselen + filenamelen;
-	}
-	memcpy(path.buf, base, baselen);
-	memcpy(path.buf + baselen, filename, filenamelen);
-	path.len = baselen + filenamelen;
-	if (S_ISDIR(mode)) {
-		strbuf_append_string(&path, "/");
-		buffer = NULL;
-		size = 0;
-	} else {
-		buffer = read_sha1_file(sha1, type, &size);
-		if (!buffer)
-			die("cannot read %s", sha1_to_hex(sha1));
-	}
-
-	write_entry(sha1, &path, mode, buffer, size);
-	free(buffer);
-
-	return READ_TREE_RECURSIVE;
-}
-
-int write_tar_archive(struct archiver_args *args)
-{
-	int plen = args->base ? strlen(args->base) : 0;
-
-	git_config(git_tar_config);
-
-	archive_time = args->time;
-	verbose = args->verbose;
-
-	if (args->commit_sha1)
-		write_global_extended_header(args->commit_sha1);
-
-	if (args->base && plen > 0 && args->base[plen - 1] == '/') {
-		char *base = xstrdup(args->base);
-		int baselen = strlen(base);
-
-		while (baselen > 0 && base[baselen - 1] == '/')
-			base[--baselen] = '\0';
-		write_tar_entry(args->tree->object.sha1, "", 0, base, 040777, 0);
-		free(base);
-	}
-	read_tree_recursive(args->tree, args->base, plen, 0,
-			    args->pathspec, write_tar_entry);
-	write_trailer();
-
-	return 0;
-}
-
 static const char *exec = "git-upload-tar";
 
 static int remote_tar(int argc, const char **argv)