Check Buildx version

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/buildx.ts

@@ -1,5 +1,6 @@
 import fs from 'fs';
 import path from 'path';
+import * as semver from 'semver';
 import * as context from './context';
 import * as exec from './exec';
 
@@ -24,6 +25,23 @@ export async function isAvailable(): Promise<Boolean> {
   });
 }
 
+export async function getVersion(): Promise<string> {
+  return await exec.exec(`docker`, ['buildx', 'version'], true).then(res => {
+    if (res.stderr != '' && !res.success) {
+      throw new Error(res.stderr);
+    }
+    return parseVersion(res.stdout);
+  });
+}
+
+export async function parseVersion(stdout: string): Promise<string> {
+  const matches = /\sv([0-9.]+)\s/.exec(stdout);
+  if (!matches) {
+    throw new Error(`Cannot parse Buildx version`);
+  }
+  return semver.clean(matches[1]);
+}
+
 export async function use(builder: string): Promise<void> {
   return await exec.exec(`docker`, ['buildx', 'use', '--builder', builder], false).then(res => {
     if (res.stderr != '' && !res.success) {

src/context.ts

@@ -1,6 +1,7 @@
 import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
+import * as semver from 'semver';
 import * as buildx from './buildx';
 import * as core from '@actions/core';
 
@@ -46,15 +47,15 @@ export async function getInputs(): Promise<Inputs> {
   };
 }
 
-export async function getArgs(inputs: Inputs): Promise<Array<string>> {
+export async function getArgs(inputs: Inputs, buildxVersion: string): Promise<Array<string>> {
   let args: Array<string> = ['buildx'];
-  args.push.apply(args, await getBuildArgs(inputs));
+  args.push.apply(args, await getBuildArgs(inputs, buildxVersion));
   args.push.apply(args, await getCommonArgs(inputs));
   args.push(inputs.context);
   return args;
 }
 
-async function getBuildArgs(inputs: Inputs): Promise<Array<string>> {
+async function getBuildArgs(inputs: Inputs, buildxVersion: string): Promise<Array<string>> {
   let args: Array<string> = ['build'];
   await asyncForEach(inputs.buildArgs, async buildArg => {
     args.push('--build-arg', buildArg);
@@ -73,7 +74,8 @@ async function getBuildArgs(inputs: Inputs): Promise<Array<string>> {
   }
   if (inputs.platforms.length > 0) {
     args.push('--platform', inputs.platforms.join(','));
-  } else {
+  }
+  if (inputs.platforms.length == 0 || semver.satisfies(buildxVersion, '>=0.4.2')) {
     args.push('--iidfile', await buildx.getImageIDFile());
   }
   await asyncForEach(inputs.outputs, async output => {

src/main.ts

@@ -16,6 +16,9 @@ async function run(): Promise<void> {
       return;
     }
 
+    const buildxVersion = await buildx.getVersion();
+    core.info(`📣 Buildx version: ${buildxVersion}`);
+
     let inputs: Inputs = await getInputs();
     if (inputs.builder) {
       core.info(`📌 Using builder instance ${inputs.builder}`);
@@ -23,7 +26,7 @@ async function run(): Promise<void> {
     }
 
     core.info(`🏃 Starting build...`);
-    const args: string[] = await getArgs(inputs);
+    const args: string[] = await getArgs(inputs, buildxVersion);
     await exec.exec('docker', args);
 
     const imageID = await buildx.getImageID();