Merge branch 'be/tag'

* be/tag:
  add more informative error messages to git-mktag
  remove the artificial restriction tagsize < 8kb

diff --git a/cache.h b/cache.h
index f625c8e..3a46fb9 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -155,6 +155,7 @@ extern int ce_match_stat(struct cache_entry *ce, struct stat *st, int);
 extern int ce_modified(struct cache_entry *ce, struct stat *st, int);
 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type);
+extern int read_pipe(int fd, char** return_buf, unsigned long* return_size);
 extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);

diff --git a/mktag.c b/mktag.c
index 2328878..f0fe528 100644 (file)
--- a/mktag.c
+++ b/mktag.c
@@ -45,42 +45,46 @@ static int verify_tag(char *buffer, unsigned long size)
        unsigned char sha1[20];
        const char *object, *type_line, *tag_line, *tagger_line;
 
-       if (size < 64 || size > MAXSIZE-1)
-               return -1;
+       if (size < 64)
+               return error("wanna fool me ? you obviously got the size wrong !\n");
+
        buffer[size] = 0;
 
        /* Verify object line */
        object = buffer;
        if (memcmp(object, "object ", 7))
-               return -1;
+               return error("char%d: does not start with \"object \"\n", 0);
+
        if (get_sha1_hex(object + 7, sha1))
-               return -1;
+               return error("char%d: could not get SHA1 hash\n", 7);
 
        /* Verify type line */
        type_line = object + 48;
        if (memcmp(type_line - 1, "\ntype ", 6))
-               return -1;
+               return error("char%d: could not find \"\\ntype \"\n", 47);
 
        /* Verify tag-line */
        tag_line = strchr(type_line, '\n');
        if (!tag_line)
-               return -1;
+               return error("char%td: could not find next \"\\n\"\n", type_line - buffer);
        tag_line++;
        if (memcmp(tag_line, "tag ", 4) || tag_line[4] == '\n')
-               return -1;
+               return error("char%td: no \"tag \" found\n", tag_line - buffer);
 
        /* Get the actual type */
        typelen = tag_line - type_line - strlen("type \n");
        if (typelen >= sizeof(type))
-               return -1;
+               return error("char%td: type too long\n", type_line+5 - buffer);
+
        memcpy(type, type_line+5, typelen);
        type[typelen] = 0;
 
        /* Verify that the object matches */
        if (get_sha1_hex(object + 7, sha1))
-               return -1;
+               return error("char%d: could not get SHA1 hash but this is really odd since i got it before !\n", 7);
+
        if (verify_object(sha1, type))
-               return -1;
+               return error("char%d: could not verify object %s\n", 7, sha1);
 
        /* Verify the tag-name: we don't allow control characters or spaces in it */
        tag_line += 4;
@@ -90,14 +94,14 @@ static int verify_tag(char *buffer, unsigned long size)
                        break;
                if (c > ' ')
                        continue;
-               return -1;
+               return error("char%td: could not verify tag name\n", tag_line - buffer);
        }
 
        /* Verify the tagger line */
        tagger_line = tag_line;
 
        if (memcmp(tagger_line, "tagger", 6) || (tagger_line[6] == '\n'))
-               return -1;
+               return error("char%td: could not find \"tagger\"\n", tagger_line - buffer);
 
        /* The actual stuff afterwards we don't care about.. */
        return 0;
@@ -105,8 +109,8 @@ static int verify_tag(char *buffer, unsigned long size)
 
 int main(int argc, char **argv)
 {
-       unsigned long size;
-       char buffer[MAXSIZE];
+       unsigned long size = 4096;
+       char *buffer = malloc(size);
        unsigned char result_sha1[20];
 
        if (argc != 1)
@@ -114,13 +118,9 @@ int main(int argc, char **argv)
 
        setup_git_directory();
 
-       // Read the signature
-       size = 0;
-       for (;;) {
-               int ret = xread(0, buffer + size, MAXSIZE - size);
-               if (ret <= 0)
-                       break;
-               size += ret;
+       if (read_pipe(0, &buffer, &size)) {
+               free(buffer);
+               die("could not read from stdin");
        }
 
        // Verify it for some basic sanity: it needs to start with "object <sha1>\ntype\ntagger "
@@ -129,6 +129,9 @@ int main(int argc, char **argv)
 
        if (write_sha1_file(buffer, size, tag_type, result_sha1) < 0)
                die("unable to write tag file");
+
+       free(buffer);
+
        printf("%s\n", sha1_to_hex(result_sha1));
        return 0;
 }

diff --git a/sha1_file.c b/sha1_file.c
index 2230010..e444d9d 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1645,16 +1645,24 @@ int has_sha1_file(const unsigned char *sha1)
        return find_sha1_file(sha1, &st) ? 1 : 0;
 }
 
-int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
+/*
+ * reads from fd as long as possible into a supplied buffer of size bytes.
+ * If neccessary the buffer's size is increased using realloc()
+ *
+ * returns 0 if anything went fine and -1 otherwise
+ *
+ * NOTE: both buf and size may change, but even when -1 is returned
+ * you still have to free() it yourself.
+ */
+int read_pipe(int fd, char** return_buf, unsigned long* return_size)
 {
-       unsigned long size = 4096;
-       char *buf = malloc(size);
-       int iret, ret;
+       char* buf = *return_buf;
+       unsigned long size = *return_size;
+       int iret;
        unsigned long off = 0;
-       unsigned char hdr[50];
-       int hdrlen;
+
        do {
-               iret = read(fd, buf + off, size - off);
+               iret = xread(fd, buf + off, size - off);
                if (iret > 0) {
                        off += iret;
                        if (off == size) {
@@ -1663,16 +1671,34 @@ int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
                        }
                }
        } while (iret > 0);
-       if (iret < 0) {
+
+       *return_buf = buf;
+       *return_size = off;
+
+       if (iret < 0)
+               return -1;
+       return 0;
+}
+
+int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
+{
+       unsigned long size = 4096;
+       char *buf = malloc(size);
+       int ret;
+       unsigned char hdr[50];
+       int hdrlen;
+
+       if (read_pipe(fd, &buf, &size)) {
                free(buf);
                return -1;
        }
+
        if (!type)
                type = blob_type;
        if (write_object)
-               ret = write_sha1_file(buf, off, type, sha1);
+               ret = write_sha1_file(buf, size, type, sha1);
        else {
-               write_sha1_file_prepare(buf, off, type, sha1, hdr, &hdrlen);
+               write_sha1_file_prepare(buf, size, type, sha1, hdr, &hdrlen);
                ret = 0;
        }
        free(buf);