From 0912ba47242d8d83a90aa774a5ab2836f8b28d21 Mon Sep 17 00:00:00 2001
From: Shrikant Sharat <shrikantsharat.k@gmail.com>
Date: Fri, 20 Jul 2012 16:29:57 +0530
Subject: [PATCH] Print a summary of changes pulled, on -update.

Running an `antigen-update` will now print a --oneline git log of the changes
that are pulled. Helpful if interested in what has just been updated and a
glimpse on what can be expected.
---
 antigen.zsh | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/antigen.zsh b/antigen.zsh
index 18ce4c4..16a8359 100644
--- a/antigen.zsh
+++ b/antigen.zsh
@@ -102,7 +102,7 @@ antigen-update () {
         | sort -u \
         | while read url; do
             echo "**** Pulling $url"
-            -antigen-ensure-repo --update "$url"
+            -antigen-ensure-repo --update --verbose "$url"
             echo
         done
 }
@@ -160,8 +160,15 @@ antigen-update () {
     if [[ ! -d $clone_dir ]]; then
         git clone "${url%|*}" "$clone_dir"
     elif $update; then
+        # Save current revision.
+        old_rev="$(git --git-dir "$clone_dir/.git" --work-tree "$clone_dir" \
+            rev-parse HEAD)"
         # Pull changes if update requested.
-        git --git-dir "$clone_dir/.git" --work-tree "$clone_dir" pull
+        git --git-dir "$clone_dir/.git" --work-tree "$clone_dir" \
+            pull
+        # Get the new revision.
+        new_rev="$(git --git-dir "$clone_dir/.git" --work-tree "$clone_dir" \
+            rev-parse HEAD)"
     fi
 
     # If its a specific branch that we want, checkout that branch.
@@ -170,6 +177,14 @@ antigen-update () {
             checkout "${url#*|}"
     fi
 
+    if ! [[ -z $old_rev || $old_rev == $new_rev ]]; then
+        echo Updated from ${old_rev:0:7} to ${new_rev:0:7}.
+        if $verbose; then
+            git --git-dir "$clone_dir/.git" --work-tree "$clone_dir" \
+                log --oneline --reverse --no-merges --stat '@{1}..'
+        fi
+    fi
+
 }
 
 -antigen-load () {
-- 
2.0.0