Updates to Caching

- updates cache to use the cache dir as a linked representation
  of the build dir
- fixing cache build/extract

JIRA: APEX-325

Change-Id: I80bf67e5d55ca2e069ca72e6b47303368bda0433
Signed-off-by: Dan Radez <dradez@redhat.com>

1 files changed, 35 insertions, 6 deletions

diff --git a/ci/build.sh b/ci/build.sh
index f1333ce4..42388188 100755
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -18,7 +18,7 @@ $0 Builds the Apex OPNFV Deployment Toolchain
 usage: $0 [ -c cache_dir ] -r release_name [ --iso | --rpms ]
 
 OPTIONS:
-  -c cache destination - directory of cached files, defaults to ./cache
+  -c cache destination - destination to save tarball of cache
   -r release name/version of the build result
   --iso build the iso (implies RPMs too)
   --rpms build the rpms
@@ -45,7 +45,7 @@ parse_cmdline() {
                 display_usage
                 exit 0
             ;;
-        -c|--cache-dir)
+        -c|--cache-dest)
                 CACHE_DEST=${2}
                 shift 2
             ;;
@@ -68,6 +68,11 @@ parse_cmdline() {
                 echo "Enable debug output"
                 shift 1
             ;;
+        --build-cache )
+                MAKE_TARGETS=""
+                echo "Building Cache"
+                shift 1
+            ;;
         *)
                 display_usage
                 exit 1
@@ -96,20 +101,35 @@ done
 if [ -n "$RELEASE" ]; then MAKE_ARGS+="RELEASE=$RELEASE "; fi
 
 # Get the Old Cache
-if [ -n "$CACHE_DEST" ]; then
+if [[ -n "$CACHE_DEST" && -n "$MAKE_TARGETS" ]]; then
     echo "Retrieving Cache"
     if [ -f $CACHE_DEST/${CACHE_NAME}.tgz ]; then
         echo "Cache found at ${CACHE_DEST}/${CACHE_NAME}.tgz"
         rm -rf $BUILD_BASE/$CACHE_DIR
         echo "Unpacking Cache to $BUILD_BASE"
         tar -xvzf $CACHE_DEST/${CACHE_NAME}.tgz -C ${BUILD_BASE}
+        if [ -f $BUILD_BASE/.cache ]; then
+            echo "Rebuilding .cache file"
+            if [ ! -d $BUILD_BASE/$CACHE_DIR ]; then
+                mkdir $BUILD_BASE/$CACHE_DIR
+            fi
+            for i in $(ls $BUILD_BASE/$CACHE_DIR); do
+                grep $i $BUILD_BASE/.cache >> $BUILD_BASE/$CACHE_DIR/.cache
+            done
+        fi
         echo "Cache contents after unpack:"
         ls -l $BUILD_BASE/$CACHE_DIR
-    elif [ ! -d $BUILD_BASE/$CACHE_DIR ]; then
-        mkdir $BUILD_BASE/$CACHE_DIR
+    else
+        echo "No Cache Found"
     fi
 fi
 
+# Ensure the build cache dir exists
+if [ ! -d "$BUILD_BASE/$CACHE_DIR" ]; then
+    echo "Creating Build Cache Directory"
+    mkdir $BUILD_BASE/$CACHE_DIR
+fi
+
 # Conditionally execute RPM build checks if the specs change and target is not rpm or iso
 if [[ "$MAKE_TARGETS" == "images" ]]; then
     commit_file_list=$(git show --pretty="format:" --name-status)
@@ -154,8 +174,17 @@ echo "Build Complete"
 # Build new Cache
 if [ -n "$CACHE_DEST" ]; then
     echo "Building Cache"
+    ls -lh $BUILD_BASE/$CACHE_DIR/
+    # ensure the destination exists
     if [ ! -d $CACHE_DEST ]; then mkdir -p $CACHE_DEST; fi
-    tar --atime-preserve --dereference -C $BUILD_BASE -caf $BUILD_BASE/${CACHE_NAME}.tgz $CACHE_DIR -C ${CACHE_DEST}/
+    # ensure a sub cache dir exists to mirror the build base for extraction
+    if [ ! -d $BUILD_BASE/$CACHE_DIR/$CACHE_DIR/ ]; then mkdir -p $BUILD_BASE/$CACHE_DIR/$CACHE_DIR/; fi
+    # move directly cached files to cache dir for future extraction
+    for i in $(cat $BUILD_BASE/$CACHE_DIR/.cache | awk '{ print $2 }'); do
+        if [ -f $i ]; then mv $i $BUILD_BASE/$CACHE_DIR/$CACHE_DIR/; fi
+    done
+    # roll the cache tarball
+    tar --atime-preserve --dereference -C ${BUILD_BASE}/$CACHE_DIR -caf $CACHE_DEST/${CACHE_NAME}.tgz .
     if [ -f "${CACHE_DEST}/${CACHE_NAME}.tgz" ]; then
       echo "Cache Build Complete"
     else