archive.c: make archiver static
[git/git.git] / archive.c
index 6502b76..44ab008 100644 (file)
--- a/archive.c
+++ b/archive.c
@@ -1,6 +1,28 @@
 #include "cache.h"
 #include "commit.h"
+#include "tree-walk.h"
 #include "attr.h"
+#include "archive.h"
+#include "parse-options.h"
+
+static char const * const archive_usage[] = {
+       "git archive [options] <tree-ish> [path...]",
+       "git archive --list",
+       "git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
+       "git archive --remote <repo> [--exec <cmd>] --list",
+       NULL
+};
+
+#define USES_ZLIB_COMPRESSION 1
+
+static const struct archiver {
+       const char *name;
+       write_archive_fn_t write_archive;
+       unsigned int flags;
+} archivers[] = {
+       { "tar", write_tar_archive },
+       { "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
+};
 
 static void format_subst(const struct commit *commit,
                          const char *src, size_t len,
@@ -26,7 +48,7 @@ static void format_subst(const struct commit *commit,
                strbuf_add(&fmt, b + 8, c - b - 8);
 
                strbuf_add(buf, src, b - src);
-               format_commit_message(commit, fmt.buf, buf);
+               format_commit_message(commit, fmt.buf, buf, DATE_NORMAL);
                len -= c + 1 - src;
                src  = c + 1;
        }
@@ -35,34 +57,9 @@ static void format_subst(const struct commit *commit,
        free(to_free);
 }
 
-static int convert_to_archive(const char *path,
-                              const void *src, size_t len,
-                              struct strbuf *buf,
-                              const struct commit *commit)
-{
-       static struct git_attr *attr_export_subst;
-       struct git_attr_check check[1];
-
-       if (!commit)
-               return 0;
-
-       if (!attr_export_subst)
-               attr_export_subst = git_attr("export-subst", 12);
-
-       check[0].attr = attr_export_subst;
-       if (git_checkattr(path, ARRAY_SIZE(check), check))
-               return 0;
-       if (!ATTR_TRUE(check[0].value))
-               return 0;
-
-       format_subst(commit, src, len, buf);
-       return 1;
-}
-
-void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
-                           unsigned int mode, enum object_type *type,
-                           unsigned long *sizep,
-                           const struct commit *commit)
+static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
+               unsigned int mode, enum object_type *type,
+               unsigned long *sizep, const struct commit *commit)
 {
        void *buffer;
 
@@ -74,7 +71,8 @@ void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
                strbuf_init(&buf, 0);
                strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
                convert_to_working_tree(path, buf.buf, buf.len, &buf);
-               convert_to_archive(path, buf.buf, buf.len, &buf, commit);
+               if (commit)
+                       format_subst(commit, buf.buf, buf.len, &buf);
                buffer = strbuf_detach(&buf, &size);
                *sizep = size;
        }
@@ -82,16 +80,263 @@ void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
        return buffer;
 }
 
-int is_archive_path_ignored(const char *path)
+static void setup_archive_check(struct git_attr_check *check)
 {
        static struct git_attr *attr_export_ignore;
-       struct git_attr_check check[1];
+       static struct git_attr *attr_export_subst;
 
-       if (!attr_export_ignore)
+       if (!attr_export_ignore) {
                attr_export_ignore = git_attr("export-ignore", 13);
-
+               attr_export_subst = git_attr("export-subst", 12);
+       }
        check[0].attr = attr_export_ignore;
-       if (git_checkattr(path, ARRAY_SIZE(check), check))
-               return 0;
-       return ATTR_TRUE(check[0].value);
+       check[1].attr = attr_export_subst;
+}
+
+struct archiver_context {
+       struct archiver_args *args;
+       write_archive_entry_fn_t write_entry;
+};
+
+static int write_archive_entry(const unsigned char *sha1, const char *base,
+               int baselen, const char *filename, unsigned mode, int stage,
+               void *context)
+{
+       static struct strbuf path = STRBUF_INIT;
+       struct archiver_context *c = context;
+       struct archiver_args *args = c->args;
+       write_archive_entry_fn_t write_entry = c->write_entry;
+       struct git_attr_check check[2];
+       const char *path_without_prefix;
+       int convert = 0;
+       int err;
+       enum object_type type;
+       unsigned long size;
+       void *buffer;
+
+       strbuf_reset(&path);
+       strbuf_grow(&path, PATH_MAX);
+       strbuf_add(&path, base, baselen);
+       strbuf_addstr(&path, filename);
+       path_without_prefix = path.buf + args->baselen;
+
+       setup_archive_check(check);
+       if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
+               if (ATTR_TRUE(check[0].value))
+                       return 0;
+               convert = ATTR_TRUE(check[1].value);
+       }
+
+       if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
+               strbuf_addch(&path, '/');
+               if (args->verbose)
+                       fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
+               err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
+               if (err)
+                       return err;
+               return READ_TREE_RECURSIVE;
+       }
+
+       buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
+                       &type, &size, convert ? args->commit : NULL);
+       if (!buffer)
+               return error("cannot read %s", sha1_to_hex(sha1));
+       if (args->verbose)
+               fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
+       err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
+       free(buffer);
+       return err;
+}
+
+int write_archive_entries(struct archiver_args *args,
+               write_archive_entry_fn_t write_entry)
+{
+       struct archiver_context context;
+       int err;
+
+       if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
+               size_t len = args->baselen;
+
+               while (len > 1 && args->base[len - 2] == '/')
+                       len--;
+               if (args->verbose)
+                       fprintf(stderr, "%.*s\n", (int)len, args->base);
+               err = write_entry(args, args->tree->object.sha1, args->base,
+                               len, 040777, NULL, 0);
+               if (err)
+                       return err;
+       }
+
+       context.args = args;
+       context.write_entry = write_entry;
+
+       err =  read_tree_recursive(args->tree, args->base, args->baselen, 0,
+                       args->pathspec, write_archive_entry, &context);
+       if (err == READ_TREE_RECURSIVE)
+               err = 0;
+       return err;
+}
+
+static const struct archiver *lookup_archiver(const char *name)
+{
+       int i;
+
+       if (!name)
+               return NULL;
+
+       for (i = 0; i < ARRAY_SIZE(archivers); i++) {
+               if (!strcmp(name, archivers[i].name))
+                       return &archivers[i];
+       }
+       return NULL;
+}
+
+static void parse_pathspec_arg(const char **pathspec,
+               struct archiver_args *ar_args)
+{
+       ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
+}
+
+static void parse_treeish_arg(const char **argv,
+               struct archiver_args *ar_args, const char *prefix)
+{
+       const char *name = argv[0];
+       const unsigned char *commit_sha1;
+       time_t archive_time;
+       struct tree *tree;
+       const struct commit *commit;
+       unsigned char sha1[20];
+
+       if (get_sha1(name, sha1))
+               die("Not a valid object name");
+
+       commit = lookup_commit_reference_gently(sha1, 1);
+       if (commit) {
+               commit_sha1 = commit->object.sha1;
+               archive_time = commit->date;
+       } else {
+               commit_sha1 = NULL;
+               archive_time = time(NULL);
+       }
+
+       tree = parse_tree_indirect(sha1);
+       if (tree == NULL)
+               die("not a tree object");
+
+       if (prefix) {
+               unsigned char tree_sha1[20];
+               unsigned int mode;
+               int err;
+
+               err = get_tree_entry(tree->object.sha1, prefix,
+                                    tree_sha1, &mode);
+               if (err || !S_ISDIR(mode))
+                       die("current working directory is untracked");
+
+               tree = parse_tree_indirect(tree_sha1);
+       }
+       ar_args->tree = tree;
+       ar_args->commit_sha1 = commit_sha1;
+       ar_args->commit = commit;
+       ar_args->time = archive_time;
+}
+
+#define OPT__COMPR(s, v, h, p) \
+       { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
+         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
+#define OPT__COMPR_HIDDEN(s, v, p) \
+       { OPTION_SET_INT, (s), NULL, (v), NULL, "", \
+         PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) }
+
+static int parse_archive_args(int argc, const char **argv,
+               const struct archiver **ar, struct archiver_args *args)
+{
+       const char *format = "tar";
+       const char *base = NULL;
+       const char *remote = NULL;
+       const char *exec = NULL;
+       int compression_level = -1;
+       int verbose = 0;
+       int i;
+       int list = 0;
+       struct option opts[] = {
+               OPT_GROUP(""),
+               OPT_STRING(0, "format", &format, "fmt", "archive format"),
+               OPT_STRING(0, "prefix", &base, "prefix",
+                       "prepend prefix to each pathname in the archive"),
+               OPT__VERBOSE(&verbose),
+               OPT__COMPR('0', &compression_level, "store only", 0),
+               OPT__COMPR('1', &compression_level, "compress faster", 1),
+               OPT__COMPR_HIDDEN('2', &compression_level, 2),
+               OPT__COMPR_HIDDEN('3', &compression_level, 3),
+               OPT__COMPR_HIDDEN('4', &compression_level, 4),
+               OPT__COMPR_HIDDEN('5', &compression_level, 5),
+               OPT__COMPR_HIDDEN('6', &compression_level, 6),
+               OPT__COMPR_HIDDEN('7', &compression_level, 7),
+               OPT__COMPR_HIDDEN('8', &compression_level, 8),
+               OPT__COMPR('9', &compression_level, "compress better", 9),
+               OPT_GROUP(""),
+               OPT_BOOLEAN('l', "list", &list,
+                       "list supported archive formats"),
+               OPT_GROUP(""),
+               OPT_STRING(0, "remote", &remote, "repo",
+                       "retrieve the archive from remote repository <repo>"),
+               OPT_STRING(0, "exec", &exec, "cmd",
+                       "path to the remote git-upload-archive command"),
+               OPT_END()
+       };
+
+       argc = parse_options(argc, argv, opts, archive_usage, 0);
+
+       if (remote)
+               die("Unexpected option --remote");
+       if (exec)
+               die("Option --exec can only be used together with --remote");
+
+       if (!base)
+               base = "";
+
+       if (list) {
+               for (i = 0; i < ARRAY_SIZE(archivers); i++)
+                       printf("%s\n", archivers[i].name);
+               exit(0);
+       }
+
+       /* We need at least one parameter -- tree-ish */
+       if (argc < 1)
+               usage_with_options(archive_usage, opts);
+       *ar = lookup_archiver(format);
+       if (!*ar)
+               die("Unknown archive format '%s'", format);
+
+       args->compression_level = Z_DEFAULT_COMPRESSION;
+       if (compression_level != -1) {
+               if ((*ar)->flags & USES_ZLIB_COMPRESSION)
+                       args->compression_level = compression_level;
+               else {
+                       die("Argument not supported for format '%s': -%d",
+                                       format, compression_level);
+               }
+       }
+       args->verbose = verbose;
+       args->base = base;
+       args->baselen = strlen(base);
+
+       return argc;
+}
+
+int write_archive(int argc, const char **argv, const char *prefix,
+               int setup_prefix)
+{
+       const struct archiver *ar = NULL;
+       struct archiver_args args;
+
+       argc = parse_archive_args(argc, argv, &ar, &args);
+       if (setup_prefix && prefix == NULL)
+               prefix = setup_git_directory();
+
+       parse_treeish_arg(argv, &args, prefix);
+       parse_pathspec_arg(argv + 1, &args);
+
+       return ar->write_archive(&args);
 }