Add dryRun on infuse command (#61)

* Add dryRun option on infuse command

* Remove  unused variable

Author: robinsondotnet

src/commands/infuse.ts

@@ -16,6 +16,7 @@ type InfuseOptions = {
   target: string
   locales: string
   match?: string
+  dryRun: boolean
 }
 
 export const command = 'infuse'
@@ -41,6 +42,12 @@ export const builder = (args: Argv): Argv<InfuseOptions> => {
       alias: 'm',
       describe: 'option should be accepted a regex filenames, must be specified together --messages'
     })
+    .option('dryRun', {
+      type: 'boolean',
+      alias: 'd',
+      default: false,
+      describe: 'run the infuse command, but do not apply them'
+    })
 }
 
 export const handler = (args: Arguments<InfuseOptions>): void => {
@@ -51,7 +58,7 @@ export const handler = (args: Arguments<InfuseOptions>): void => {
   const meta = squeeze(targetPath, sources)
   apply(messages, meta)
   const newSources = infuse(targetPath, sources, meta)
-  writeSFC(newSources)
+  if (!args.dryRun) writeSFC(newSources)
 }
 
 function readLocaleMessages (targetPath: string, matchRegex?: string): LocaleMessages {

test/__snapshots__/cli.test.ts.snap

@@ -12,7 +12,9 @@ Options:
                                                              [string] [required]
   --locales, -l  locale messages path to be infused          [string] [required]
   --match, -m    option should be accepted a regex filenames, must be specified
-                 together --messages                                    [string]"
+                 together --messages                                    [string]
+  --dryRun, -d   run the infuse command, but do not apply them
+                                                      [boolean] [default: false]"
 `;
 
 exports[`squeeze command output help 1`] = `

test/commands/infuse.test.ts

@@ -131,6 +131,34 @@ test('relative path', async () => {
   }
 })
 
+test('dryRun option', async () => {
+  // setup mock'
+  const mockUtils = utils as jest.Mocked<typeof utils>
+  mockUtils.resolve
+    .mockImplementationOnce(() => `${TARGET_PATH}/src`)
+    .mockImplementationOnce((...paths) => `${TARGET_PATH}/${paths[0]}`)
+  const mockFS = fs as jest.Mocked<typeof fs>
+  mockFS.readFileSync.mockImplementation(path => {
+    if (MOCK_FILES[path as string]) {
+      return MOCK_FILES[path as string]
+    } else {
+      return JSON.stringify(json)
+    }
+  })
+
+  // run
+  const infuse = await import('../../src/commands/infuse')
+  const cmd = yargs.command(infuse)
+  await new Promise(resolve => {
+    cmd.parse(`infuse --target=./src --locales=locales-2.json --dry-run`, () => {
+      resolve()
+    })
+  })
+
+  // check
+  expect(mockFS.writeFileSync).not.toHaveBeenCalled()
+})
+
 test('match option', async () => {
   // setup mocks
   const mockUtils = utils as jest.Mocked<typeof utils>