Add scripts to help people replicate CI

.circleci/config.yml

@@ -11,7 +11,7 @@ commands:
           key: dependency-cache-{{ checksum "package.json" }}
           paths:
             - ./node_modules
-      - run: yarn run build
+      - run: bash -c 'yarn run build'
 jobs:
   lint:
     docker:
@@ -20,21 +20,19 @@ jobs:
       - run: sudo apt update
       - run: sudo apt install -qq shellcheck
       - commoncmd
-      - run: bash -c 'GLOBIGNORE="node_modules" shellcheck -e2012 **/*.sh'
-      - run: yarn run lint
-      - run: bash -c '"$(yarn bin)/eslint" src --ext .ts'
+      - run: bash -c './ci/lint.sh'
   unit:
     docker:
       - image: circleci/node:latest
     steps:
       - commoncmd
-      - run: bash -c '"$(yarn bin)/jest" src'
+      - run: bash -c './ci/unit.sh'
   mozilla:
     docker:
       - image: circleci/node:latest
     steps:
       - commoncmd
-      - run: bash -c 'cd build; "$(yarn bin)/web-ext" lint'
+      - run: bash -c 'ci/mozilla.sh'
 
 workflows:
   version: 2

ci/lint.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+cd ${0%/*}/..
+if ! [ -x "$(command -v shellcheck)" ]; then
+	GLOBIGNORE="node_modules" shellcheck -e2012 **/*.sh
+else
+	echo "Warning: shellcheck is not installed, skipping shell scripts"
+fi
+yarn run lint
+"$(yarn bin)/eslint" --ext .ts

ci/mozilla.sh

@@ -0,0 +1,3 @@
+#! /bin/sh
+cd ${0%/*}/../build
+"$(yarn bin)/web-ext" lint

ci/unit.sh

@@ -0,0 +1,3 @@
+#! /bin/sh
+cd ${0%/}
+"$(yarn bin)/jest" src