Fix emacs hook to not clobber match data

[nogit] / nogit

diff --git a/nogit b/nogit
index b9a248e3f638ad9e2a203a1b8f77dd47601b4454..9135d4e8894ac0c9557b51d989ed74eed55fe812 100755 (executable)
--- a/nogit
+++ b/nogit
@@ -2,6 +2,7 @@
 set -e
 
 NOGIT_DIR=.nogit
+NOGIT_DIR_TMP=$NOGIT_DIR-tmp
 
 usage_brief()
 {
@@ -51,6 +52,10 @@ usage()
     echo "          with an auto-generated commit message)"
     echo ""
     echo "        * Push out any new commits generated locally"
+    echo ""
+    echo "nogit log"
+    echo ""
+    echo "    Display a log of changes"
 }
 
 nogit_clone()
@@ -58,13 +63,19 @@ nogit_clone()
     url="$1"
 
     if [ -e $NOGIT_DIR ]; then
-        echo "Error: .nogit already exists. Cowardly refusing to re-clone."
+        echo "Error: $NOGIT_DIR already exists. Cowardly refusing to re-clone."
+        return 1
+    fi
+
+    if [ -e $NOGIT_DIR_TMP ]; then
+        echo "Error: $NOGIT_DIR_TMP already exists. Was a previous clone interrupted?"
+        echo "You'll want to clean that up before trying again."
         return 1
     fi
 
     # Clone the repository into a temporary directory
-    mkdir $NOGIT_DIR-tmp
-    cd $NOGIT_DIR-tmp
+    mkdir $NOGIT_DIR_TMP
+    cd $NOGIT_DIR_TMP
     git clone "$url" tmp >/dev/null 2>&1
 
     # Sanity check that we won't be overwriting any files
@@ -86,16 +97,25 @@ nogit_clone()
         echo "" >&2
         echo "Cowardly refusing to clone" >&2
         cd ..
-        rm -rf $NOGIT_DIR-tmp
+        rm -rf $NOGIT_DIR_TMP
         false
     fi
 
+    # Install the info/atttributes file that forces the "union" merge
+    # driver for all files, giving us the semantics of "keep both sides
+    # of all conflicts" that is at the heart of nogit.
+    mkdir -p tmp/.git/info
+    echo '* merge=union' > tmp/.git/info/attributes
+
+    # Install the config entry for the pretty format for "nogit log"
+    (cd tmp; git config pretty.nogit "format:%Cblue%h %an (%ad)%Creset")
+
     # Now that we've passed the sanity check, install the cloned .git
     # object store into $NOGIT_DIR, cleanup our temporary files, and
     # checkout the (known to not be conflicting) files.
     mv tmp/.git ../$NOGIT_DIR
     cd ..
-    rm -rf $NOGIT_DIR-tmp
+    rm -rf $NOGIT_DIR_TMP
     GIT_DIR=$NOGIT_DIR git reset --hard >/dev/null 2>&1
 
     echo "Completed nogit clone of $url"
@@ -103,7 +123,22 @@ nogit_clone()
 
 nogit_sync()
 {
-    echo "Internal error: 'nogit sync' not yet implemented"
+    # First commit any locally modified nogit files
+    GIT_DIR=$NOGIT_DIR git commit -a -m "nogit-sync commit" >/dev/null 2>&1 || true
+
+    # Then, fetch and merge any upstream changes
+    GIT_DIR=$NOGIT_DIR git fetch >/dev/null 2>&1
+    GIT_DIR=$NOGIT_DIR git merge -m "nogit-sync merge" >/dev/null 2>&1
+
+    # Finally, push any new commits up to the upstream repository
+    GIT_DIR=$NOGIT_DIR git push >/dev/null 2>&1
+
+    echo "Completed nogit sync"
+}
+
+nogit_log()
+{
+    GIT_DIR=$NOGIT_DIR git log -p --pretty=nogit
 }
 
 if [ $# -lt 1 ]; then
@@ -122,14 +157,17 @@ case "$cmd" in
             false;
         fi
         nogit_clone "$2"
-    ;;
+       ;;
     sync)
         nogit_sync
-    ;;
+       ;;
+    log)
+        nogit_log
+        ;;
     help)
         usage
         true
-    ;;
+       ;;
     *)
         echo "Error: Unknown command: $cmd" >&2
         echo ""