From cfe2abcb6b083e83a3dca6db7d5ecf837aa4beb2 Mon Sep 17 00:00:00 2001
From: Davlet Panech <davlet.panech@windriver.com>
Date: Wed, 20 Apr 2022 14:53:17 -0400
Subject: [PATCH] debian: stx-init-env: option to use docker cache

By default we use the "--no-cache" option when building containers. Add
a command-line option to avoid this, to make testing this script easier.

TESTS
=====================
Rebuild containers with and without the "--cache" option

Story: 2008846
Task: 45124

Signed-off-by: Davlet Panech <davlet.panech@windriver.com>
Change-Id: I79d61cc9a7606d6de65478ced5bab325f7264278
---
 stx-init-env | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/stx-init-env b/stx-init-env
index d1d18e76e..89b11d096 100755
--- a/stx-init-env
+++ b/stx-init-env
@@ -17,6 +17,11 @@ Initialize StarlingX build environment & (re-)start builder pods
 
      --rebuild    build pod images instead of downloading them
 
+     --cache      allow docker to use its filesystem cache (with --rebuild)
+                    CAUTION: this option may not pick up all the changes to
+                             docker source files and is meant for debugging
+                             the build scripts.
+
 END
 }
 
@@ -43,6 +48,7 @@ BUILD_DOCKER=0
 DELETE_ENV=0
 RESTART_MINIKUBE=0
 CLEAN_CONFIG=0
+USE_DOCKER_CACHE=0
 
 minikube_started() {
     docker ps | grep kicbase | grep -q $MINIKUBENAME
@@ -74,7 +80,7 @@ cmdline_error() {
 }
 
 # process command line
-temp=$(getopt -o hR --long help,clean,restart-minikube,rebuild,nuke -n "$PROGNAME" -- "$@") || cmdline_error
+temp=$(getopt -o hR --long help,clean,restart-minikube,rebuild,cache,nuke -n "$PROGNAME" -- "$@") || cmdline_error
 eval set -- "$temp"
 while true ; do
     case "$1" in
@@ -94,6 +100,10 @@ while true ; do
             BUILD_DOCKER=1
             shift
             ;;
+        --cache)
+            USE_DOCKER_CACHE=1
+            shift
+            ;;
         --nuke)
             DELETE_ENV=1
             shift
@@ -242,8 +252,12 @@ fi
 # Build container images
 if [[ $BUILD_DOCKER -eq 1 ]] ; then
     notice "Building docker images"
+    declare -a docker_build_args
+    if [[ "$USE_DOCKER_CACHE" != "1" ]] ; then
+        docker_build_args+=("--no-cache")
+    fi
     for img in $DOCKER_IMAGES; do
-        docker build --no-cache -t $img:$DOCKER_TAG_LOCAL -f stx/dockerfiles/$img.Dockerfile . || exit 1
+        docker build "${docker_build_args[@]}" -t $img:$DOCKER_TAG_LOCAL -f stx/dockerfiles/$img.Dockerfile . || exit 1
     done
 # else: download and retag
 else