git-checkout: revert specific paths to either index or a given tree-ish.

diff --git a/update-index.c b/update-index.c
index 1eeb45dbb18a7a9fb081a6ce1b4d9558f2ff7b21..a84836be4a0cd32a61d4ae35c8ce3b0108ad5a34 100644 (file)
--- a/update-index.c
+++ b/update-index.c
@@ -5,6 +5,7 @@
  */
 #include "cache.h"
 #include "strbuf.h"
+#include "quote.h"
 
 /*
  * Default to not allowing changes to the list of files. The
@@ -13,8 +14,15 @@
  * like "git-update-index *" and suddenly having all the object
  * files be revision controlled.
  */
-static int allow_add = 0, allow_remove = 0, allow_replace = 0, allow_unmerged = 0, not_new = 0, quiet = 0, info_only = 0;
+static int allow_add;
+static int allow_remove;
+static int allow_replace;
+static int allow_unmerged; /* --refresh needing merge is not error */
+static int not_new; /* --refresh not having working tree files is not error */
+static int quiet; /* --refresh needing update is not error */
+static int info_only;
 static int force_remove;
+static int verbose;
 
 /* Three functions to allow overloaded pointer return; see linux/err.h */
 static inline void *ERR_PTR(long error)
@@ -32,6 +40,19 @@ static inline long IS_ERR(const void *ptr)
        return (unsigned long)ptr > (unsigned long)-1000L;
 }
 
+static void report(const char *fmt, ...)
+{
+       va_list vp;
+
+       if (!verbose)
+               return;
+
+       va_start(vp, fmt);
+       vprintf(fmt, vp);
+       putchar('\n');
+       va_end(vp);
+}
+
 static int add_file_to_cache(const char *path)
 {
        int size, namelen, option, status;
@@ -260,7 +281,11 @@ static int add_cacheinfo(const char *arg1, const char *arg2, const char *arg3)
        ce->ce_mode = create_ce_mode(mode);
        option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
        option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
-       return add_cache_entry(ce, option);
+       if (add_cache_entry(ce, option))
+               return error("%s: cannot add to the index - missing --add option?",
+                            arg3);
+       report("add '%s'", arg3);
+       return 0;
 }
 
 static int chmod_path(int flip, const char *path)
@@ -300,10 +325,12 @@ static void update_one(const char *path, const char *prefix, int prefix_length)
        if (force_remove) {
                if (remove_file_from_cache(p))
                        die("git-update-index: unable to remove %s", path);
+               report("remove '%s'", path);
                return;
        }
        if (add_file_to_cache(p))
                die("Unable to process file %s", path);
+       report("add '%s'", path);
 }
 
 static void read_index_info(int line_termination)
@@ -312,6 +339,7 @@ static void read_index_info(int line_termination)
        strbuf_init(&buf);
        while (1) {
                char *ptr;
+               char *path_name;
                unsigned char sha1[20];
                unsigned int mode;
 
@@ -326,14 +354,22 @@ static void read_index_info(int line_termination)
                        goto bad_line;
 
                ptr += 42;
-               if (!verify_path(ptr)) {
-                       fprintf(stderr, "Ignoring path %s\n", ptr);
+
+               if (line_termination && ptr[0] == '"')
+                       path_name = unquote_c_style(ptr, NULL);
+               else
+                       path_name = ptr;
+
+               if (!verify_path(path_name)) {
+                       fprintf(stderr, "Ignoring path %s\n", path_name);
+                       if (path_name != ptr)
+                               free(path_name);
                        continue;
                }
 
                if (!mode) {
                        /* mode == 0 means there is no such path -- remove */
-                       if (remove_file_from_cache(ptr))
+                       if (remove_file_from_cache(path_name))
                                die("git-update-index: unable to remove %s",
                                    ptr);
                }
@@ -343,10 +379,12 @@ static void read_index_info(int line_termination)
                         * ptr[-41] is at the beginning of sha1
                         */
                        ptr[-42] = ptr[-1] = 0;
-                       if (add_cacheinfo(buf.buf, ptr-41, ptr))
+                       if (add_cacheinfo(buf.buf, ptr-41, path_name))
                                die("git-update-index: unable to update %s",
-                                   ptr);
+                                   path_name);
                }
+               if (path_name != ptr)
+                       free(path_name);
                continue;
 
        bad_line:
@@ -447,6 +485,10 @@ int main(int argc, const char **argv)
                                not_new = 1;
                                continue;
                        }
+                       if (!strcmp(path, "--verbose")) {
+                               verbose = 1;
+                               continue;
+                       }
                        die("unknown option %s", path);
                }
                update_one(path, prefix, prefix_length);