Add snap after-package repack script

scripts/afterPack.ts

@@ -0,0 +1,22 @@
+import * as fs from 'fs-extra'
+import * as path from 'path'
+import { chdir } from 'process'
+import { exec } from './util'
+
+export default async function (info: any) {
+  for (const snapFile of info.artifactPaths) {
+    if (/\.snap$/.test(snapFile)) {
+      const originalDir = __dirname
+      const dirname = path.dirname(snapFile)
+      chdir(dirname)
+
+      await exec('sudo', ['unsquashfs', snapFile])
+      await fs.remove(snapFile)
+      await exec('sudo', ['chmod', '-R', 'g-s', 'squashfs-root'])
+      await exec('sudo', ['snapcraft', 'pack', 'squashfs-root', '--output', snapFile])
+      await fs.remove('squashfs-root')
+
+      chdir(originalDir)
+    }
+  }
+}

scripts/prepare-release.ts

@@ -1,36 +1,7 @@
 import * as fs from 'fs-extra'
 import * as path from 'path'
-import { spawn, ChildProcess } from 'child_process'
 import { chdir } from 'process'
-
-async function exec(cmd: string, args: string[] = []) {
-  const child = spawn(cmd, args, { shell: true })
-  redirectOutputFor(child)
-  await waitFor(child)
-}
-
-function redirectOutputFor(child: ChildProcess) {
-  const printStdout = (data: Buffer) => {
-    process.stdout.write(data.toString())
-  }
-  const printStderr = (data: Buffer) => {
-    process.stderr.write(data.toString())
-  }
-  child.stdout.on('data', printStdout)
-  child.stderr.on('data', printStderr)
-
-  child.once('close', () => {
-    child.stdout.off('data', printStdout)
-    child.stderr.off('data', printStderr)
-  })
-}
-
-async function waitFor(child: ChildProcess) {
-
-  return new Promise((resolve) => {
-    child.once('close', () => resolve())
-  })
-}
+import { exec } from './util';
 
 const targetDir = path.join('build', 'clean')
 async function prepareRelease() {

scripts/util.ts

@@ -0,0 +1,29 @@
+import { spawn, ChildProcess } from 'child_process'
+
+export async function exec(cmd: string, args: string[] = []) {
+  const child = spawn(cmd, args, { shell: true })
+  redirectOutputFor(child)
+  await waitFor(child)
+}
+
+function redirectOutputFor(child: ChildProcess) {
+  const printStdout = (data: Buffer) => {
+    process.stdout.write(data.toString())
+  }
+  const printStderr = (data: Buffer) => {
+    process.stderr.write(data.toString())
+  }
+  child.stdout.on('data', printStdout)
+  child.stderr.on('data', printStderr)
+
+  child.once('close', () => {
+    child.stdout.off('data', printStdout)
+    child.stderr.off('data', printStderr)
+  })
+}
+
+async function waitFor(child: ChildProcess) {
+  return new Promise((resolve) => {
+    child.once('close', () => resolve())
+  })
+}