blame: show "previous" information in --porcelain/--incremental format
[gitweb.git] / archive-tar.c
index 99db58f1cf21ee30f150c54acd6ffefbb14b6f57..ba890ebdecd8672aeb32757605c8a2976fa21161 100644 (file)
@@ -2,9 +2,7 @@
  * Copyright (c) 2005, 2006 Rene Scharfe
  */
 #include "cache.h"
-#include "commit.h"
 #include "tar.h"
-#include "builtin.h"
 #include "archive.h"
 
 #define RECORDSIZE     (512)
 static char block[BLOCKSIZE];
 static unsigned long offset;
 
-static time_t archive_time;
 static int tar_umask = 002;
-static int verbose;
-static const struct commit *commit;
-static size_t base_len;
 
 /* writes out the whole block, but only if it is full */
 static void write_if_needed(void)
@@ -114,25 +108,26 @@ static unsigned int ustar_header_chksum(const struct ustar_header *header)
        return chksum;
 }
 
-static int get_path_prefix(const struct strbuf *path, int maxlen)
+static size_t get_path_prefix(const char *path, size_t pathlen, size_t maxlen)
 {
-       int i = path->len;
+       size_t i = pathlen;
        if (i > maxlen)
                i = maxlen;
        do {
                i--;
-       } while (i > 0 && path->buf[i] != '/');
+       } while (i > 0 && path[i] != '/');
        return i;
 }
 
-static void write_entry(const unsigned char *sha1, struct strbuf *path,
-                        unsigned int mode, void *buffer, unsigned long size)
+static int write_tar_entry(struct archiver_args *args,
+               const unsigned char *sha1, const char *path, size_t pathlen,
+               unsigned int mode, void *buffer, unsigned long size)
 {
        struct ustar_header header;
-       struct strbuf ext_header;
+       struct strbuf ext_header = STRBUF_INIT;
+       int err = 0;
 
        memset(&header, 0, sizeof(header));
-       strbuf_init(&ext_header, 0);
 
        if (!sha1) {
                *header.typeflag = TYPEFLAG_GLOBAL_HEADER;
@@ -143,8 +138,6 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
                mode = 0100666;
                sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1));
        } else {
-               if (verbose)
-                       fprintf(stderr, "%.*s\n", (int)path->len, path->buf);
                if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
                        *header.typeflag = TYPEFLAG_DIR;
                        mode = (mode | 0777) & ~tar_umask;
@@ -155,24 +148,24 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
                        *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;
+                       return error("unsupported file mode: 0%o (SHA1: %s)",
+                                       mode, sha1_to_hex(sha1));
                }
-               if (path->len > sizeof(header.name)) {
-                       int plen = get_path_prefix(path, sizeof(header.prefix));
-                       int rest = path->len - plen - 1;
+               if (pathlen > sizeof(header.name)) {
+                       size_t plen = get_path_prefix(path, pathlen,
+                                       sizeof(header.prefix));
+                       size_t rest = pathlen - plen - 1;
                        if (plen > 0 && rest <= sizeof(header.name)) {
-                               memcpy(header.prefix, path->buf, plen);
-                               memcpy(header.name, path->buf + plen + 1, rest);
+                               memcpy(header.prefix, path, plen);
+                               memcpy(header.name, path + plen + 1, rest);
                        } else {
                                sprintf(header.name, "%s.data",
                                        sha1_to_hex(sha1));
                                strbuf_append_ext_header(&ext_header, "path",
-                                                        path->buf, path->len);
+                                               path, pathlen);
                        }
                } else
-                       memcpy(header.name, path->buf, path->len);
+                       memcpy(header.name, path, pathlen);
        }
 
        if (S_ISLNK(mode) && buffer) {
@@ -187,7 +180,7 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
 
        sprintf(header.mode, "%07o", mode & 07777);
        sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0);
-       sprintf(header.mtime, "%011lo", archive_time);
+       sprintf(header.mtime, "%011lo", args->time);
 
        sprintf(header.uid, "%07o", 0);
        sprintf(header.gid, "%07o", 0);
@@ -202,22 +195,29 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
        sprintf(header.chksum, "%07o", ustar_header_chksum(&header));
 
        if (ext_header.len > 0) {
-               write_entry(sha1, NULL, 0, ext_header.buf, ext_header.len);
+               err = write_tar_entry(args, sha1, NULL, 0, 0, ext_header.buf,
+                               ext_header.len);
+               if (err)
+                       return err;
        }
        strbuf_release(&ext_header);
        write_blocked(&header, sizeof(header));
        if (S_ISREG(mode) && buffer && size > 0)
                write_blocked(buffer, size);
+       return err;
 }
 
-static void write_global_extended_header(const unsigned char *sha1)
+static int write_global_extended_header(struct archiver_args *args)
 {
-       struct strbuf ext_header;
+       const unsigned char *sha1 = args->commit_sha1;
+       struct strbuf ext_header = STRBUF_INIT;
+       int err;
 
-       strbuf_init(&ext_header, 0);
        strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);
-       write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len);
+       err = write_tar_entry(args, NULL, NULL, 0, 0, ext_header.buf,
+                       ext_header.len);
        strbuf_release(&ext_header);
+       return err;
 }
 
 static int git_tar_config(const char *var, const char *value, void *cb)
@@ -234,64 +234,17 @@ static int git_tar_config(const char *var, const char *value, void *cb)
        return git_default_config(var, value, cb);
 }
 
-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 = STRBUF_INIT;
-       void *buffer;
-       enum object_type type;
-       unsigned long size;
-
-       strbuf_reset(&path);
-       strbuf_grow(&path, PATH_MAX);
-       strbuf_add(&path, base, baselen);
-       strbuf_addstr(&path, filename);
-       if (is_archive_path_ignored(path.buf + base_len))
-               return 0;
-       if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
-               strbuf_addch(&path, '/');
-               buffer = NULL;
-               size = 0;
-       } else {
-               buffer = sha1_file_to_archive(path.buf + base_len, sha1, mode,
-                               &type, &size, commit);
-               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;
+       int err = 0;
 
        git_config(git_tar_config, NULL);
 
-       archive_time = args->time;
-       verbose = args->verbose;
-       commit = args->commit;
-       base_len = args->base ? strlen(args->base) : 0;
-
        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;
+               err = write_global_extended_header(args);
+       if (!err)
+               err = write_archive_entries(args, write_tar_entry);
+       if (!err)
+               write_trailer();
+       return err;
 }