buildx: hasAttestationType and resolveAttestationAttrs funcs

__tests__/buildx/inputs.test.ts

@@ -244,6 +244,41 @@ describe('hasDockerExporter', () => {
   });
 });
 
+describe('hasAttestationType', () => {
+  // prettier-ignore
+  test.each([
+    ['type=provenance,mode=min', 'provenance', true],
+    ['type=sbom,true', 'sbom', true],
+    ['type=foo,bar', 'provenance', false],
+  ])('given %p for %p returns %p', async (attrs: string, name: string, expected: boolean) => {
+    expect(Inputs.hasAttestationType(name, attrs)).toEqual(expected);
+  });
+});
+
+describe('resolveAttestationAttrs', () => {
+  // prettier-ignore
+  test.each([
+    [
+      'type=provenance,mode=min',
+      'type=provenance,mode=min'
+    ],
+    [
+      'type=provenance,true',
+      'type=provenance,disabled=false'
+    ],
+    [
+      'type=provenance,false',
+      'type=provenance,disabled=true'
+    ],
+    [
+      '',
+      ''
+    ],
+  ])('given %p', async (input: string, expected: string) => {
+    expect(Inputs.resolveAttestationAttrs(input)).toEqual(expected);
+  });
+});
+
 describe('hasGitAuthTokenSecret', () => {
   // prettier-ignore
   test.each([

__tests__/util.test.ts

@@ -279,6 +279,36 @@ describe('hash', () => {
   });
 });
 
+// https://github.com/golang/go/blob/f6b93a4c358b28b350dd8fe1780c1f78e520c09c/src/strconv/atob_test.go#L36-L58
+describe('parseBool', () => {
+  [
+    {input: '', expected: false, throwsError: true},
+    {input: 'asdf', expected: false, throwsError: true},
+    {input: '0', expected: false, throwsError: false},
+    {input: 'f', expected: false, throwsError: false},
+    {input: 'F', expected: false, throwsError: false},
+    {input: 'FALSE', expected: false, throwsError: false},
+    {input: 'false', expected: false, throwsError: false},
+    {input: 'False', expected: false, throwsError: false},
+    {input: '1', expected: true, throwsError: false},
+    {input: 't', expected: true, throwsError: false},
+    {input: 'T', expected: true, throwsError: false},
+    {input: 'TRUE', expected: true, throwsError: false},
+    {input: 'true', expected: true, throwsError: false},
+    {input: 'True', expected: true, throwsError: false}
+  ].forEach(({input, expected, throwsError}) => {
+    test(`parseBool("${input}")`, () => {
+      if (throwsError) {
+        // eslint-disable-next-line jest/no-conditional-expect
+        expect(() => Util.parseBool(input)).toThrow();
+      } else {
+        // eslint-disable-next-line jest/no-conditional-expect
+        expect(Util.parseBool(input)).toBe(expected);
+      }
+    });
+  });
+});
+
 // See: https://github.com/actions/toolkit/blob/a1b068ec31a042ff1e10a522d8fdf0b8869d53ca/packages/core/src/core.ts#L89
 function getInputName(name: string): string {
   return `INPUT_${name.replace(/ /g, '_').toUpperCase()}`;

src/buildx/inputs.ts

@@ -21,6 +21,7 @@ import {parse} from 'csv-parse/sync';
 
 import {Context} from '../context';
 import {GitHub} from '../github';
+import {Util} from '../util';
 
 const parseKvp = (kvp: string): [string, string] => {
   const delimiterIndex = kvp.indexOf('=');
@@ -176,6 +177,45 @@ export class Inputs {
     return false;
   }
 
+  public static hasAttestationType(name: string, attrs: string): boolean {
+    const records = parse(attrs, {
+      delimiter: ',',
+      trim: true,
+      columns: false,
+      relaxColumnCount: true
+    });
+    for (const record of records) {
+      for (const [key, value] of record.map((chunk: string) => chunk.split('=').map(item => item.trim()))) {
+        if (key == 'type' && value == name) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+
+  public static resolveAttestationAttrs(attrs: string): string {
+    const records = parse(attrs, {
+      delimiter: ',',
+      trim: true,
+      columns: false,
+      relaxColumnCount: true
+    });
+    const res: Array<string> = [];
+    for (const record of records) {
+      for (const attr of record) {
+        try {
+          // https://github.com/docker/buildx/blob/8abef5908705e49f7ba88ef8c957e1127b597a2a/util/buildflags/attests.go#L13-L21
+          const v = Util.parseBool(attr);
+          res.push(`disabled=${!v}`);
+        } catch (err) {
+          res.push(attr);
+        }
+      }
+    }
+    return res.join(',');
+  }
+
   public static hasGitAuthTokenSecret(secrets: string[]): boolean {
     for (const secret of secrets) {
       if (secret.startsWith('GIT_AUTH_TOKEN=')) {

src/util.ts

@@ -144,4 +144,26 @@ export class Util {
   public static hash(input: string): string {
     return crypto.createHash('sha256').update(input).digest('hex');
   }
+
+  // https://github.com/golang/go/blob/f6b93a4c358b28b350dd8fe1780c1f78e520c09c/src/strconv/atob.go#L7-L18
+  public static parseBool(str: string): boolean {
+    switch (str) {
+      case '1':
+      case 't':
+      case 'T':
+      case 'true':
+      case 'TRUE':
+      case 'True':
+        return true;
+      case '0':
+      case 'f':
+      case 'F':
+      case 'false':
+      case 'FALSE':
+      case 'False':
+        return false;
+      default:
+        throw new Error(`parseBool syntax error: ${str}`);
+    }
+  }
 }