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 +1,97 @@
+#!/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
+
+# While most shells support `local`, it technically isn't POSIX. This will check
+# for `local` and alias it to `typeset` if it doesn't exist.
+# shellcheck disable=SC3043
+#            If a shell does not support `local`, it will be aliased to
+#            `typeset`, so this check is not needed.
+has_local() {
+  local _has_local
+}
+has_local 2>/dev/null || alias local=typeset
+
+set -o errexit # Exit on error
+set -o nounset # Treat unset variables as an error
+
+# Colours
+WHITE_BOLD='\033[1;37m'
+RESET='\033[0m'
+
+detect_osarch() {
+  case $(uname -sm) in
+  'Linux x86_64')
+    os='linux'
+    arch='x86_64'
+    ext=''
+    ;;
+  'Linux aarch64')
+    os='linux'
+    arch='aarch64'
+    ext=''
+    ;;
+  'Darwin x86' | 'Darwin x86_64')
+    os='osx'
+    arch='x86_64'
+    ext=''
+    ;;
+  'Darwin arm64')
+    os='osx'
+    arch='aarch64'
+    ext=''
+    ;;
+  CYGWIN* | MINGW32* | MSYS* | MINGW*)
+    os="windows"
+    arch='x86_64'
+    ext='.exe'
+    ;;
+  *)
+    echo "Sorry, you'll need to install the plugin CLI manually."
+    exit 1
+    ;;
+  esac
+}
+
+install_pact_plugin_cli() {
+  [ -f ~/.pact/bin/pact-plugin-cli ] && \
+    echo "${WHITE_BOLD}=> Plugin CLI already installed${RESET}" && \
+    return
+
+  local version="0.1.2"
+  detect_osarch
+  local url="https://github.com/pact-foundation/pact-plugins/releases/download/pact-plugin-cli-v${version}/pact-plugin-cli-${os}-${arch}${ext}.gz"
+
+  URL=https://github.com/pact-foundation/pact-plugins/releases/download/pact-plugin-cli-v${version}/pact-plugin-cli-${os}-${arch}${ext}.gz
+  echo "${WHITE_BOLD}=> Installing plugins CLI version '${version}'${RESET}"
+  echo "  - OS: ${os}"
+  echo "  - Arch: ${arch}"
+  echo "  - Version: ${version}"
+  echo "  - URL: ${url}"
+  echo "  - Downloading into: ~/.pact/bin/"
+
+  mkdir -p ~/.pact/bin
+  curl -sSL $URL | gunzip -c >~/.pact/bin/pact-plugin-cli
+  chmod +x ~/.pact/bin/pact-plugin-cli
+}
+
+install_matt_plugin() {
+  [ -d ~/.pact/plugins/matt-0.1.1 ] && \
+    echo -e "${WHITE_BOLD}=> MATT plugin already installed${RESET}" && \
+    return
+
+  local version="0.1.1"
+
+  echo "${WHITE_BOLD}=> Installing MATT plugin version '${version}'${RESET}"
+  ~/.pact/bin/pact-plugin-cli install
+}
+
+main() {
+  install_pact_plugin_cli
+  install_matt_plugin
+}
+
+main