feat: initial implementation of bazel-module manager

lib/modules/manager/api.ts

@@ -6,6 +6,7 @@ import * as azurePipelines from './azure-pipelines';
 import * as batect from './batect';
 import * as batectWrapper from './batect-wrapper';
 import * as bazel from './bazel';
+import * as bazelModule from './bazel-module';
 import * as bazelisk from './bazelisk';
 import * as bicep from './bicep';
 import * as bitbucketPipelines from './bitbucket-pipelines';
@@ -96,6 +97,7 @@ api.set('azure-pipelines', azurePipelines);
 api.set('batect', batect);
 api.set('batect-wrapper', batectWrapper);
 api.set('bazel', bazel);
+api.set('bazel-module', bazelModule);
 api.set('bazelisk', bazelisk);
 api.set('bicep', bicep);
 api.set('bitbucket-pipelines', bitbucketPipelines);

lib/modules/manager/bazel-module/bazel-dep.spec.ts

@@ -0,0 +1,23 @@
+import { BazelDatasource } from '../../datasource/bazel';
+import { ToBazelDep } from './bazel-dep';
+import * as fragments from './fragments';
+
+describe('modules/manager/bazel-module/bazel-dep', () => {
+  describe('ToBazelDep', () => {
+    it('transforms a record fragment', () => {
+      const record = fragments.record({
+        rule: fragments.string('bazel_dep'),
+        name: fragments.string('rules_foo'),
+        version: fragments.string('1.2.3'),
+        dev_dependency: fragments.boolean(true),
+      });
+      const result = ToBazelDep.parse(record);
+      expect(result).toEqual({
+        datasource: BazelDatasource.id,
+        depType: 'bazel_dep',
+        depName: 'rules_foo',
+        currentValue: '1.2.3',
+      });
+    });
+  });
+});

lib/modules/manager/bazel-module/bazel-dep.ts

@@ -0,0 +1,28 @@
+import { z } from 'zod';
+import { BazelDatasource } from '../../datasource/bazel';
+import type { PackageDependency } from '../types';
+import {
+  BooleanFragmentSchema,
+  RecordFragmentSchema,
+  StringFragmentSchema,
+} from './fragments';
+
+const BazelDepSchema = RecordFragmentSchema.extend({
+  children: z.object({
+    rule: StringFragmentSchema.extend({
+      value: z.literal('bazel_dep'),
+    }),
+    name: StringFragmentSchema,
+    version: StringFragmentSchema,
+    dev_dependency: BooleanFragmentSchema.optional(),
+  }),
+});
+
+export const ToBazelDep = BazelDepSchema.transform(
+  ({ children: { rule, name, version } }): PackageDependency => ({
+    datasource: BazelDatasource.id,
+    depType: rule.value,
+    depName: name.value,
+    currentValue: version.value,
+  })
+);

lib/modules/manager/bazel-module/context.spec.ts

@@ -0,0 +1,98 @@
+import { Ctx, CtxProcessingError } from './context';
+import * as fragments from './fragments';
+
+describe('modules/manager/bazel-module/context', () => {
+  describe('Ctx', () => {
+    it('construct simple bazel_dep', () => {
+      const ctx = new Ctx()
+        .startRule('bazel_dep')
+        .startAttribute('name')
+        .addString('rules_foo')
+        .startAttribute('version')
+        .addString('1.2.3')
+        .endRule();
+
+      expect(ctx.results).toEqual([
+        fragments.record(
+          {
+            rule: fragments.string('bazel_dep'),
+            name: fragments.string('rules_foo'),
+            version: fragments.string('1.2.3'),
+          },
+          true
+        ),
+      ]);
+    });
+
+    it('construct a rule with array arg', () => {
+      const ctx = new Ctx()
+        .startRule('foo_library')
+        .startAttribute('name')
+        .addString('my_library')
+        .startAttribute('srcs')
+        .startArray()
+        .addString('first')
+        .addString('second')
+        .endArray()
+        .endRule();
+
+      expect(ctx.results).toEqual([
+        fragments.record(
+          {
+            rule: fragments.string('foo_library'),
+            name: fragments.string('my_library'),
+            srcs: fragments.array(
+              [fragments.string('first'), fragments.string('second')],
+              true
+            ),
+          },
+          true
+        ),
+      ]);
+    });
+
+    describe('.currentRecord', () => {
+      it('returns the record fragment if it is current', () => {
+        const ctx = new Ctx().startRecord();
+        expect(ctx.currentRecord).toEqual(fragments.record());
+      });
+
+      it('throws if there is no current', () => {
+        const ctx = new Ctx();
+        expect(() => ctx.currentRecord).toThrow(
+          new Error('Requested current, but no value.')
+        );
+      });
+
+      it('throws if the current is not a record fragment', () => {
+        const ctx = new Ctx().startArray();
+        expect(() => ctx.currentRecord).toThrow(
+          new Error('Requested current record, but does not exist.')
+        );
+      });
+    });
+
+    describe('.currentArray', () => {
+      it('returns the array fragment if it is current', () => {
+        const ctx = new Ctx().startArray();
+        expect(ctx.currentArray).toEqual(fragments.array());
+      });
+
+      it('throws if the current is not a record fragment', () => {
+        const ctx = new Ctx().startRecord();
+        expect(() => ctx.currentArray).toThrow(
+          new Error('Requested current array, but does not exist.')
+        );
+      });
+    });
+
+    it('throws if add an attribute without a parent', () => {
+      const ctx = new Ctx().startAttribute('name');
+      expect(() => ctx.addString('chicken')).toThrow(
+        new CtxProcessingError(
+          fragments.attribute('name', fragments.string('chicken'))
+        )
+      );
+    });
+  });
+});

lib/modules/manager/bazel-module/context.ts

@@ -0,0 +1,154 @@
+import type {
+  AllFragments,
+  ArrayFragment,
+  ChildFragments,
+  RecordFragment,
+} from './fragments';
+import * as fragments from './fragments';
+
+// Represents the fields that the context must have.
+export interface CtxCompatible {
+  results: RecordFragment[];
+  stack: AllFragments[];
+}
+
+export class CtxProcessingError extends Error {
+  readonly current: AllFragments;
+  readonly parent?: AllFragments;
+  constructor(current: AllFragments, parent?: AllFragments) {
+    const msg = `Invalid context state. current: ${current.type}, parent: ${
+      parent?.type ?? 'none'
+    }`;
+    super(msg);
+    this.name = 'CtxProcessingError';
+    this.current = current;
+    this.parent = parent;
+  }
+}
+
+export class Ctx implements CtxCompatible {
+  results: RecordFragment[];
+  stack: AllFragments[];
+
+  constructor(results: RecordFragment[] = [], stack: AllFragments[] = []) {
+    this.results = results;
+    this.stack = stack;
+  }
+
+  private get safeCurrent(): AllFragments | undefined {
+    return this.stack.at(-1);
+  }
+
+  private get current(): AllFragments {
+    const c = this.safeCurrent;
+    if (c === undefined) {
+      throw new Error('Requested current, but no value.');
+    }
+    return c;
+  }
+  get currentRecord(): RecordFragment {
+    const current = this.current;
+    if (current.type === 'record') {
+      return current;
+    }
+    throw new Error('Requested current record, but does not exist.');
+  }
+
+  get currentArray(): ArrayFragment {
+    const current = this.current;
+    if (current.type === 'array') {
+      return current;
+    }
+    throw new Error('Requested current array, but does not exist.');
+  }
+
+  private popStack(): boolean {
+    const current = this.stack.pop();
+    if (!current) {
+      return false;
+    }
+    if (!current.isComplete) {
+      this.stack.push(current);
+      return false;
+    }
+    const parent = this.safeCurrent;
+
+    if (parent) {
+      if (parent.type === 'attribute' && fragments.isValue(current)) {
+        parent.value = current;
+        parent.isComplete = true;
+        return true;
+      }
+      if (parent.type === 'array' && fragments.isPrimitive(current)) {
+        parent.items.push(current);
+        return true;
+      }
+      if (
+        parent.type === 'record' &&
+        current.type === 'attribute' &&
+        current.value !== undefined
+      ) {
+        parent.children[current.name] = current.value;
+        return true;
+      }
+    } else if (current.type === 'record') {
+      this.results.push(current);
+      return true;
+    }
+
+    throw new CtxProcessingError(current, parent);
+  }
+
+  private processStack(): Ctx {
+    while (this.popStack()) {
+      // Nothing to do
+    }
+    return this;
+  }
+
+  addString(value: string): Ctx {
+    this.stack.push(fragments.string(value));
+    return this.processStack();
+  }
+
+  addBoolean(value: string | boolean): Ctx {
+    this.stack.push(fragments.boolean(value));
+    return this.processStack();
+  }
+
+  startRecord(children: ChildFragments = {}): Ctx {
+    const record = fragments.record(children);
+    this.stack.push(record);
+    return this;
+  }
+
+  endRecord(): Ctx {
+    const record = this.currentRecord;
+    record.isComplete = true;
+    return this.processStack();
+  }
+
+  startRule(name: string): Ctx {
+    return this.startRecord({ rule: fragments.string(name) });
+  }
+
+  endRule(): Ctx {
+    return this.endRecord();
+  }
+
+  startAttribute(name: string): Ctx {
+    this.stack.push(fragments.attribute(name));
+    return this.processStack();
+  }
+
+  startArray(): Ctx {
+    this.stack.push(fragments.array());
+    return this.processStack();
+  }
+
+  endArray(): Ctx {
+    const array = this.currentArray;
+    array.isComplete = true;
+    return this.processStack();
+  }
+}

lib/modules/manager/bazel-module/extract.spec.ts

@@ -0,0 +1,58 @@
+import { codeBlock } from 'common-tags';
+import { BazelDatasource } from '../../datasource/bazel';
+import * as parser from './parser';
+import { extractPackageFile } from '.';
+
+describe('modules/manager/bazel-module/extract', () => {
+  describe('extractPackageFile()', () => {
+    it('returns null if fails to parse', () => {
+      const result = extractPackageFile('blahhhhh:foo:@what\n', 'MODULE.bazel');
+      expect(result).toBeNull();
+    });
+
+    it('returns null if something throws an error', () => {
+      jest.spyOn(parser, 'parse').mockImplementationOnce((input) => {
+        throw new Error('Test error');
+      });
+      const result = extractPackageFile('content', 'MODULE.bazel');
+      expect(result).toBeNull();
+    });
+
+    it('returns null if file is empty', () => {
+      const result = extractPackageFile('', 'MODULE.bazel');
+      expect(result).toBeNull();
+    });
+
+    it('returns null if file has not recognized declarations', () => {
+      const input = codeBlock`
+        ignore_me(name = "rules_foo", version = "1.2.3")
+      `;
+      const result = extractPackageFile(input, 'MODULE.bazel');
+      expect(result).toBeNull();
+    });
+
+    it('returns dependencies', () => {
+      const input = codeBlock`
+        bazel_dep(name = "rules_foo", version = "1.2.3")
+        bazel_dep(name = "rules_bar", version = "1.0.0", dev_dependency = True)
+      `;
+      const result = extractPackageFile(input, 'MODULE.bazel');
+      expect(result).toEqual({
+        deps: [
+          {
+            datasource: BazelDatasource.id,
+            depType: 'bazel_dep',
+            depName: 'rules_foo',
+            currentValue: '1.2.3',
+          },
+          {
+            datasource: BazelDatasource.id,
+            depType: 'bazel_dep',
+            depName: 'rules_bar',
+            currentValue: '1.0.0',
+          },
+        ],
+      });
+    });
+  });
+});