Use "delphix/actions" for shellcheck and shfmt

.github/workflows/main.yml

@@ -11,14 +11,12 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-      - run: docker build -t delphix-platform:latest docker
-      - run: ./scripts/docker-run.sh make shellcheck
+      - uses: delphix/actions/shellcheck@master
   check-shfmt:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-      - run: docker build -t delphix-platform:latest docker
-      - run: ./scripts/docker-run.sh make shfmtcheck
+      - uses: delphix/actions/shfmt@master
   check-pylint:
     runs-on: ubuntu-18.04
     steps:

Makefile

@@ -24,11 +24,7 @@ VERSION := $(shell date '+%Y.%m.%d.%H')
 
 .PHONY: \
 	check \
-	package \
-	shellcheck \
-	shfmtcheck
-
-check: shellcheck shfmtcheck
+	package
 
 packages: $(addprefix package-,$(ALL_PLATFORMS))
 
@@ -47,9 +43,3 @@ package-%:
 	done
 
 	@mv -v ../delphix-platform-$*_*_amd64.deb artifacts
-
-shellcheck:
-	shellcheck $$(shfmt -f .)
-
-shfmtcheck:
-	shfmt -d .

docker/Dockerfile

@@ -34,11 +34,5 @@ RUN \
       devscripts \
       dpkg-dev \
       jq \
-      make \
-      shellcheck \
-      wget && \
+      make && \
   rm -rf /var/lib/apt/lists/*
-
-RUN wget -nv -O /usr/local/bin/shfmt \
-  https://github.com/mvdan/sh/releases/download/v2.4.0/shfmt_v2.4.0_linux_amd64 && \
-  chmod +x /usr/local/bin/shfmt