feat: extensions check + resolver

server/modules/extensions/git/ext.js

@@ -0,0 +1,20 @@
+const cmdExists = require('command-exists')
+
+module.exports = {
+  key: 'git',
+  title: 'Git',
+  description: 'Distributed version control system. Required for the Git storage module.',
+  isInstalled: false,
+  async isCompatible () {
+    return true
+  },
+  async check () {
+    try {
+      await cmdExists('git')
+      this.isInstalled = true
+    } catch (err) {
+      this.isInstalled = false
+    }
+    return this.isInstalled
+  }
+}

server/modules/extensions/pandoc/ext.js

@@ -0,0 +1,21 @@
+const cmdExists = require('command-exists')
+const os = require('os')
+
+module.exports = {
+  key: 'pandoc',
+  title: 'Pandoc',
+  description: 'Convert between markup formats. Required for converting from other formats such as MediaWiki, AsciiDoc, Textile and other wikis.',
+  async isCompatible () {
+    return os.arch() === 'x64'
+  },
+  isInstalled: false,
+  async check () {
+    try {
+      await cmdExists('pandoc')
+      this.isInstalled = true
+    } catch (err) {
+      this.isInstalled = false
+    }
+    return this.isInstalled
+  }
+}

server/modules/extensions/puppeteer/ext.js

@@ -0,0 +1,21 @@
+const cmdExists = require('command-exists')
+const os = require('os')
+
+module.exports = {
+  key: 'puppeteer',
+  title: 'Puppeteer',
+  description: 'Headless chromium browser for server-side rendering. Required for generating PDF versions of pages and render content elements on the server (e.g. Mermaid diagrams)',
+  async isCompatible () {
+    return os.arch() === 'x64'
+  },
+  isInstalled: false,
+  async check () {
+    try {
+      await cmdExists('pandoc')
+      this.isInstalled = true
+    } catch (err) {
+      this.isInstalled = false
+    }
+    return this.isInstalled
+  }
+}

server/modules/extensions/sharp/ext.js

@@ -0,0 +1,19 @@
+const fs = require('fs-extra')
+const os = require('os')
+const path = require('path')
+
+/* global WIKI */
+
+module.exports = {
+  key: 'sharp',
+  title: 'Sharp',
+  description: 'Process and transform images. Required to generate thumbnails of uploaded images and perform transformations.',
+  async isCompatible () {
+    return os.arch() === 'x64'
+  },
+  isInstalled: false,
+  async check () {
+    this.isInstalled = await fs.pathExists(path.join(WIKI.ROOTPATH, 'node_modules/sharp'))
+    return this.isInstalled
+  }
+}