chore: make install-plugins POSIX

Instead of relying on `bash` (which may not be installed, such as in
alpine images), use POSIX bash.

Signed-off-by: JP-Ellis <josh@jpellis.me>

Author: JP-Ellis

package.json

@@ -17,7 +17,7 @@
     "release": "commit-and-tag-version",
     "test": "mocha",
     "coverage": "nyc npm run test",
-    "pretest": "bash scripts/install-plugins.sh",
+    "pretest": "./scripts/install-plugins",
     "docker:alpine:build": "docker build --build-arg NODE_VERSION=${NODE_VERSION:-current} -f Dockerfile.alpine -t pact-js:alpine .",
     "docker:debian:build": "docker build --build-arg NODE_VERSION=${NODE_VERSION:-current} -f Dockerfile.debian -t pact-js:debian .",
     "docker:alpine:run": "docker run -e LOG_LEVEL=${LOG_LEVEL:-info} -e GIT_REF=${GIT_REF:-test} -e GITHUB_ACTIONS=${GITHUB_ACTIONS:-false} -e SKIP_EXAMPLES=${SKIP_EXAMPLES:-''} -e PACT_BROKER_BASE_URL -e PACT_BROKER_TOKEN -w /home -v $(pwd):/home --rm pact-js:alpine",

scripts/install-plugins

@@ -0,0 +1,59 @@
+#!/bin/sh
+#
+# Usage:
+#   $ curl -fsSL https://raw.githubusercontent.com/pact-foundation/pact-plugins/master/install-cli.sh | bash
+# or
+#   $ wget -q https://raw.githubusercontent.com/pact-foundation/pact-plugins/master/install-cli.sh -O- | bash
+
+set -o errexit # Exit on error
+set -o nounset # Treat unset variables as an error
+
+detect_osarch() {
+  case $(uname -sm) in
+  'Linux x86_64')
+    os='linux'
+    arch='x86_64'
+    ;;
+  'Linux aarch64')
+    os='linux'
+    arch='aarch64'
+    ;;
+  'Darwin x86' | 'Darwin x86_64')
+    os='osx'
+    arch='x86_64'
+    ;;
+  'Darwin arm64')
+    os='osx'
+    arch='aarch64'
+    ;;
+  CYGWIN* | MINGW32* | MSYS* | MINGW*)
+    os="windows"
+    arch='x86_64'
+    ext='.exe'
+    ;;
+  *)
+    echo "Sorry, you'll need to install the plugin CLI manually."
+    exit 1
+    ;;
+  esac
+}
+
+VERSION="0.1.2"
+detect_osarch
+
+if [ ! -f ~/.pact/bin/pact-plugin-cli ]; then
+  echo "--- 🐿  Installing plugins CLI version '${VERSION}' (from tag ${TAG})"
+  mkdir -p ~/.pact/bin
+  DOWNLOAD_LOCATION=https://github.com/pact-foundation/pact-plugins/releases/download/pact-plugin-cli-v${VERSION}/pact-plugin-cli-${os}-${arch}${ext}.gz
+  echo "        Downloading from: ${DOWNLOAD_LOCATION}"
+  curl -L -o ~/.pact/bin/pact-plugin-cli-${os}-${arch}.gz "${DOWNLOAD_LOCATION}"
+  echo "        Downloaded $(file ~/.pact/bin/pact-plugin-cli-${os}-${arch}.gz)"
+  gunzip -f ~/.pact/bin/pact-plugin-cli-${os}-${arch}.gz
+  mv ~/.pact/bin/pact-plugin-cli-${os}-${arch} ~/.pact/bin/pact-plugin-cli
+  chmod +x ~/.pact/bin/pact-plugin-cli
+fi
+
+if [ ! -d ~/.pact/plugins/matt-0.1.1 ]; then
+  echo "--- 🐿  Installing MATT plugin"
+  ~/.pact/bin/pact-plugin-cli install https://github.com/mefellows/pact-matt-plugin/releases/tag/v0.1.1
+fi