checkout - eye candy.

This implements "eye candy" similar to the pack-object/unpack-object
to entertain users while a large tree is being checked out after
a clone or a pull.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-clone.sh b/git-clone.sh
index d184ceb..54c9e4e 100755 (executable)
--- a/git-clone.sh
+++ b/git-clone.sh
@@ -253,7 +253,7 @@ Pull: $head_points_at:$origin" &&
 
        case "$no_checkout" in
        '')
-               git checkout
+               git-read-tree -m -u -v HEAD HEAD
        esac
 fi
 

diff --git a/git-merge.sh b/git-merge.sh
index 2b4a603..c258ea7 100755 (executable)
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -130,7 +130,7 @@ case "$#,$common,$no_commit" in
        echo "Updating from $head to $1."
        git-update-index --refresh 2>/dev/null
        new_head=$(git-rev-parse --verify "$1^0") &&
-       git-read-tree -u -m $head "$new_head" &&
+       git-read-tree -u -v -m $head "$new_head" &&
        finish "$new_head" "Fast forward"
        dropsave
        exit 0
@@ -146,7 +146,7 @@ case "$#,$common,$no_commit" in
 
        echo "Trying really trivial in-index merge..."
        git-update-index --refresh 2>/dev/null
-       if git-read-tree --trivial -m -u $common $head "$1" &&
+       if git-read-tree --trivial -m -u -v $common $head "$1" &&
           result_tree=$(git-write-tree)
        then
            echo "Wonderful."

diff --git a/read-tree.c b/read-tree.c
index 5580f15..4e0cdda 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)
@@ -680,6 +735,11 @@ 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.
                 */