[wip] introduce nimbase Docker image for improved caching

.github/workflows/testground.yml

@@ -83,8 +83,6 @@ jobs:
           docker save iptestground/sidecar:edge | gzip > "${HOME}/docker/saved-images/iptestground_sidecar_edge.tar.gz"
           docker save iptestground/sync-service:edge | gzip > "${HOME}/docker/saved-images/iptestground_sync-service_edge.tar.gz"
           docker save iptestground/testground:edge | gzip > "${HOME}/docker/saved-images/iptestground_testground_edge.tar.gz"
-          docker pull nimlang/nim:latest
-          docker save nimlang/nim:latest | gzip > "${HOME}/docker/saved-images/nimlang_nim_latest.tar.gz"
         working-directory: testground
 
       - name: Restore Testground resources from cache
@@ -93,10 +91,10 @@ jobs:
           docker load < "${HOME}/docker/saved-images/iptestground_sidecar_edge.tar.gz"
           docker load < "${HOME}/docker/saved-images/iptestground_sync-service_edge.tar.gz"
           docker load < "${HOME}/docker/saved-images/iptestground_testground_edge.tar.gz"
-          docker load < "${HOME}/docker/saved-images/nimlang_nim_latest.tar.gz"
-          docker load < "${HOME}/docker/saved-images/bitnami_grafana_latest.tar.gz" || true
-          docker load < "${HOME}/docker/saved-images/redis_latest.tar.gz" || true
-          docker load < "${HOME}/docker/saved-images/influxdb_1.8.tar.gz" || true
+          docker load < "${HOME}/docker/saved-images/nimbase_latest.tar.gz"
+          docker load < "${HOME}/docker/saved-images/bitnami_grafana_latest.tar.gz"
+          docker load < "${HOME}/docker/saved-images/redis_latest.tar.gz"
+          docker load < "${HOME}/docker/saved-images/influxdb_1.8.tar.gz"
 
       - name: Start Testground executable
         run: testground daemon &
@@ -112,6 +110,7 @@ jobs:
         if: steps.testground-reources-cache.outputs.cache-hit != 'true'
         run: |
           docker ps -a -q | xargs docker kill &>/dev/null ; docker ps -a -q | xargs docker rm
+          docker save nimbase:latest | gzip > "${HOME}/docker/saved-images/nimbase_latest.tar.gz"
           docker save bitnami/grafana:latest | gzip > "${HOME}/docker/saved-images/bitnami_grafana_latest.tar.gz"
           docker save redis:latest | gzip > "${HOME}/docker/saved-images/redis_latest.tar.gz"
           docker save influxdb:1.8 | gzip > "${HOME}/docker/saved-images/influxdb_1.8.tar.gz"

Makefile

@@ -28,6 +28,7 @@ LINK_PCRE := 0
 	test \
 	testground \
 	testground_exec \
+	testground_nimbase \
 	update
 
 ifeq ($(NIM_PARAMS),)
@@ -133,7 +134,7 @@ TESTGROUND_TESTCASE ?= default
 
 TESTGROUND_SCRATCH_IGNORE ?= "\.update\.timestamp\|Would skip\|build/\|codex\.nims\|nimcache/\|scratch/\|vendor/\.nimble"
 
-testground:
+testground: testground_nimbase
 	mkdir -p scratch && rm -rf scratch/* && git clone --depth=1 "file://$${PWD}" "scratch/$$(basename $${PWD})"
 	[[ $$(git status --porcelain) == "" ]] || (git diff --merge-base HEAD > "scratch/$$(basename $${PWD})/scratch.patch")
 	[[ $$(git status --porcelain) == "" ]] || (cd "scratch/$$(basename $${PWD})" && git apply --allow-empty scratch.patch)
@@ -147,6 +148,10 @@ testground:
 testground_exec: | build deps
 	TESTGROUND_PLAN=$(TESTGROUND_PLAN) $(ENV_SCRIPT) nim testground_exec codex.nims
 
+testground_nimbase:
+	echo -e $(BUILD_MSG) "nimbase Docker image" && \
+		[[ $$(docker image inspect nimbase:latest) != "[]" ]] || (cd testground/base && docker build -t nimbase .)
+
 # usual cleaning
 clean: | clean-common
 	rm -rf build

testground/base/Dockerfile

@@ -0,0 +1,5 @@
+FROM nimlang/nim
+
+RUN apt-get update -qq && \
+    DEBIAN_FRONTEND="noninteractive" apt-get install -yq cmake curl make && \
+    rm -rf /tmp/* /var/lib/apt/lists/* /var/tmp/*

testground/base/README.md

@@ -0,0 +1,3 @@
+# nimbase Docker image
+
+This directory does not contain a Codex Testground plan, but instead a `Dockerfile` that's used in conjunction with plans in the other subdirectories of `nim-codex/testground`.

testground/simple_libp2p/Dockerfile

@@ -1,9 +1,4 @@
-FROM nimlang/nim as builder
-
-RUN apt update -qq && \
-    DEBIAN_FRONTEND="noninteractive" apt install -yq cmake curl make
-
-FROM builder
+FROM nimbase
 
 COPY . .
 

testground/simple_tcp_ping/Dockerfile

@@ -1,9 +1,4 @@
-FROM nimlang/nim as builder
-
-RUN apt update -qq && \
-    DEBIAN_FRONTEND="noninteractive" apt install -yq cmake curl make
-
-FROM builder
+FROM nimbase
 
 COPY . .