[PATCH] archimport: Actually cope with merges from "remote" repositories. Plus: Nicer...

[git.git] / update-index.c

diff --git a/update-index.c b/update-index.c
index 8fe015b..01eaa1a 100644 (file)
--- a/update-index.c
+++ b/update-index.c
@@ -4,6 +4,7 @@
  * Copyright (C) Linus Torvalds, 2005
  */
 #include "cache.h"
+#include "strbuf.h"
 
 /*
  * Default to not allowing changes to the list of files. The
@@ -31,7 +32,7 @@ static inline long IS_ERR(const void *ptr)
        return (unsigned long)ptr > (unsigned long)-1000L;
 }
 
-static int add_file_to_cache(char *path)
+static int add_file_to_cache(const char *path)
 {
        int size, namelen, option, status;
        struct cache_entry *ce;
@@ -112,47 +113,6 @@ static int add_file_to_cache(char *path)
        return 0;
 }
 
-static int compare_data(struct cache_entry *ce, struct stat *st)
-{
-       int match = -1;
-       int fd = open(ce->name, O_RDONLY);
-
-       if (fd >= 0) {
-               unsigned char sha1[20];
-               if (!index_fd(sha1, fd, st, 0, NULL))
-                       match = memcmp(sha1, ce->sha1, 20);
-               close(fd);
-       }
-       return match;
-}
-
-static int compare_link(struct cache_entry *ce, unsigned long expected_size)
-{
-       int match = -1;
-       char *target;
-       void *buffer;
-       unsigned long size;
-       char type[10];
-       int len;
-
-       target = xmalloc(expected_size);
-       len = readlink(ce->name, target, expected_size);
-       if (len != expected_size) {
-               free(target);
-               return -1;
-       }
-       buffer = read_sha1_file(ce->sha1, type, &size);
-       if (!buffer) {
-               free(target);
-               return -1;
-       }
-       if (size == expected_size)
-               match = memcmp(buffer, target, size);
-       free(buffer);
-       free(target);
-       return match;
-}
-
 /*
  * "refresh" does not calculate a new sha1 file or bring the
  * cache up-to-date for mode/content changes. But what it
@@ -177,26 +137,9 @@ static struct cache_entry *refresh_entry(struct cache_entry *ce)
        if (!changed)
                return ce;
 
-       /*
-        * If the mode or type has changed, there's no point in trying
-        * to refresh the entry - it's not going to match
-        */
-       if (changed & (MODE_CHANGED | TYPE_CHANGED))
+       if (ce_modified(ce, &st))
                return ERR_PTR(-EINVAL);
 
-       switch (st.st_mode & S_IFMT) {
-       case S_IFREG:
-               if (compare_data(ce, &st))
-                       return ERR_PTR(-EINVAL);
-               break;
-       case S_IFLNK:
-               if (compare_link(ce, st.st_size))
-                       return ERR_PTR(-EINVAL);
-               break;
-       default:
-               return ERR_PTR(-EINVAL);
-       }
-
        size = ce_size(ce);
        updated = xmalloc(size);
        memcpy(updated, ce, size);
@@ -279,7 +222,7 @@ static int verify_dotfile(const char *rest)
        return 1;
 }
 
-static int verify_path(char *path)
+static int verify_path(const char *path)
 {
        char c;
 
@@ -305,7 +248,7 @@ inside:
        }
 }
 
-static int add_cacheinfo(char *arg1, char *arg2, char *arg3)
+static int add_cacheinfo(const char *arg1, const char *arg2, const char *arg3)
 {
        int size, len, option;
        unsigned int mode;
@@ -335,11 +278,30 @@ static int add_cacheinfo(char *arg1, char *arg2, char *arg3)
 
 static struct cache_file cache_file;
 
-int main(int argc, char **argv)
+
+static void update_one(const char *path, const char *prefix, int prefix_length)
+{
+       const char *p = prefix_path(prefix, prefix_length, path);
+       if (!verify_path(p)) {
+               fprintf(stderr, "Ignoring path %s\n", path);
+               return;
+       }
+       if (force_remove) {
+               if (remove_file_from_cache(p))
+                       die("git-update-index: unable to remove %s", path);
+               return;
+       }
+       if (add_file_to_cache(p))
+               die("Unable to process file %s", path);
+}
+
+int main(int argc, const char **argv)
 {
-       int i, newfd, entries, has_errors = 0;
+       int i, newfd, entries, has_errors = 0, line_termination = '\n';
        int allow_options = 1;
+       int read_from_stdin = 0;
        const char *prefix = setup_git_directory();
+       int prefix_length = prefix ? strlen(prefix) : 0;
 
        newfd = hold_index_file_for_update(&cache_file, get_index_file());
        if (newfd < 0)
@@ -350,7 +312,7 @@ int main(int argc, char **argv)
                die("cache corrupted");
 
        for (i = 1 ; i < argc; i++) {
-               char *path = argv[i];
+               const char *path = argv[i];
 
                if (allow_options && *path == '-') {
                        if (!strcmp(path, "--")) {
@@ -393,25 +355,33 @@ int main(int argc, char **argv)
                                force_remove = 1;
                                continue;
                        }
-
+                       if (!strcmp(path, "-z")) {
+                               line_termination = 0;
+                               continue;
+                       }
+                       if (!strcmp(path, "--stdin")) {
+                               if (i != argc - 1)
+                                       die("--stdin must be at the end");
+                               read_from_stdin = 1;
+                               break;
+                       }
                        if (!strcmp(path, "--ignore-missing")) {
                                not_new = 1;
                                continue;
                        }
                        die("unknown option %s", path);
                }
-               path = prefix_path(prefix, prefix ? strlen(prefix) : 0, path);
-               if (!verify_path(path)) {
-                       fprintf(stderr, "Ignoring path %s\n", argv[i]);
-                       continue;
-               }
-               if (force_remove) {
-                       if (remove_file_from_cache(path))
-                               die("git-update-index: unable to remove %s", path);
-                       continue;
+               update_one(path, prefix, prefix_length);
+       }
+       if (read_from_stdin) {
+               struct strbuf buf;
+               strbuf_init(&buf);
+               while (1) {
+                       read_line(&buf, stdin, line_termination);
+                       if (buf.eof)
+                               break;
+                       update_one(buf.buf, prefix, prefix_length);
                }
-               if (add_file_to_cache(path))
-                       die("Unable to process file %s", path);
        }
        if (write_cache(newfd, active_cache, active_nr) ||
            commit_index_file(&cache_file))