git-commit --amend: allow empty commit.

diff --git a/read-tree.c b/read-tree.c
index 52f06e312ab5b8808401affed6291051d7a746d5..be29b3fe11a370e53d3dce6a43dfccdc0e22ae2c 100644 (file)
--- a/read-tree.c
+++ b/read-tree.c
@@ -9,6 +9,8 @@
 
 #include "object.h"
 #include "tree.h"
+#include <sys/time.h>
+#include <signal.h>
 
 static int merge = 0;
 static int update = 0;
@@ -16,6 +18,8 @@ static int index_only = 0;
 static int nontrivial_merge = 0;
 static int trivial_merges_only = 0;
 static int aggressive = 0;
+static int verbose_update = 0;
+static volatile int progress_update = 0;
 
 static int head_idx = -1;
 static int merge_size = 0;
@@ -267,6 +271,12 @@ static void unlink_entry(char *name)
        }
 }
 
+static void progress_interval(int signum)
+{
+       signal(SIGALRM, progress_interval);
+       progress_update = 1;
+}
+
 static void check_updates(struct cache_entry **src, int nr)
 {
        static struct checkout state = {
@@ -276,8 +286,49 @@ static void check_updates(struct cache_entry **src, int nr)
                .refresh_cache = 1,
        };
        unsigned short mask = htons(CE_UPDATE);
+       unsigned last_percent = 200, cnt = 0, total = 0;
+
+       if (update && verbose_update) {
+               struct itimerval v;
+
+               for (total = cnt = 0; cnt < nr; cnt++) {
+                       struct cache_entry *ce = src[cnt];
+                       if (!ce->ce_mode || ce->ce_flags & mask)
+                               total++;
+               }
+
+               /* Don't bother doing this for very small updates */
+               if (total < 250)
+                       total = 0;
+
+               if (total) {
+                       v.it_interval.tv_sec = 1;
+                       v.it_interval.tv_usec = 0;
+                       v.it_value = v.it_interval;
+                       signal(SIGALRM, progress_interval);
+                       setitimer(ITIMER_REAL, &v, NULL);
+                       fprintf(stderr, "Checking files out...\n");
+                       progress_update = 1;
+               }
+               cnt = 0;
+       }
+
        while (nr--) {
                struct cache_entry *ce = *src++;
+
+               if (total) {
+                       if (!ce->ce_mode || ce->ce_flags & mask) {
+                               unsigned percent;
+                               cnt++;
+                               percent = (cnt * 100) / total;
+                               if (percent != last_percent ||
+                                   progress_update) {
+                                       fprintf(stderr, "%4u%% (%u/%u) done\r",
+                                               percent, cnt, total);
+                                       last_percent = percent;
+                               }
+                       }
+               }
                if (!ce->ce_mode) {
                        if (update)
                                unlink_entry(ce->name);
@@ -289,6 +340,10 @@ static void check_updates(struct cache_entry **src, int nr)
                                checkout_entry(ce, &state);
                }
        }
+       if (total) {
+               fputc('\n', stderr);
+               signal(SIGALRM, SIG_IGN);
+       }
 }
 
 static int unpack_trees(merge_fn_t fn)
@@ -505,9 +560,11 @@ static int threeway_merge(struct cache_entry **stages)
                 */
                if ((head_deleted && remote_deleted) ||
                    (head_deleted && remote && remote_match) ||
-                   (remote_deleted && head && head_match))
+                   (remote_deleted && head && head_match)) {
+                       if (index)
+                               return deleted_entry(index, index);
                        return 0;
-
+               }
                /*
                 * Added in both, identically.
                 */
@@ -564,7 +621,7 @@ static int twoway_merge(struct cache_entry **src)
        struct cache_entry *oldtree = src[1], *newtree = src[2];
 
        if (merge_size != 2)
-               return error("Cannot do a twoway merge of %d trees\n",
+               return error("Cannot do a twoway merge of %d trees",
                             merge_size);
 
        if (current) {
@@ -616,7 +673,7 @@ static int oneway_merge(struct cache_entry **src)
        struct cache_entry *a = src[1];
 
        if (merge_size != 1)
-               return error("Cannot do a oneway merge of %d trees\n",
+               return error("Cannot do a oneway merge of %d trees",
                             merge_size);
 
        if (!a)
@@ -649,7 +706,7 @@ static int read_cache_unmerged(void)
        return deleted;
 }
 
-static const char read_tree_usage[] = "git-read-tree (<sha> | -m [-u | -i] <sha1> [<sha2> [<sha3>]])";
+static const char read_tree_usage[] = "git-read-tree (<sha> | -m [--aggressive] [-u | -i] <sha1> [<sha2> [<sha3>]])";
 
 static struct cache_file cache_file;
 
@@ -680,6 +737,11 @@ int main(int argc, char **argv)
                        continue;
                }
 
+               if (!strcmp(arg, "-v")) {
+                       verbose_update = 1;
+                       continue;
+               }
+
                /* "-i" means "index only", meaning that a merge will
                 * not even look at the working tree.
                 */