buildx: split module

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

src/buildx/inputs.ts

@@ -0,0 +1,177 @@
+/**
+ * Copyright 2023 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import fs from 'fs';
+import path from 'path';
+import * as core from '@actions/core';
+import {parse} from 'csv-parse/sync';
+
+import {Context} from '../context';
+
+export class Inputs {
+  private readonly context: Context;
+
+  constructor(context: Context) {
+    this.context = context;
+  }
+
+  public getBuildImageIDFilePath(): string {
+    return path.join(this.context.tmpDir(), 'iidfile').split(path.sep).join(path.posix.sep);
+  }
+
+  public getBuildMetadataFilePath(): string {
+    return path.join(this.context.tmpDir(), 'metadata-file').split(path.sep).join(path.posix.sep);
+  }
+
+  public getBuildImageID(): string | undefined {
+    const iidFile = this.getBuildImageIDFilePath();
+    if (!fs.existsSync(iidFile)) {
+      return undefined;
+    }
+    return fs.readFileSync(iidFile, {encoding: 'utf-8'}).trim();
+  }
+
+  public getBuildMetadata(): string | undefined {
+    const metadataFile = this.getBuildMetadataFilePath();
+    if (!fs.existsSync(metadataFile)) {
+      return undefined;
+    }
+    const content = fs.readFileSync(metadataFile, {encoding: 'utf-8'}).trim();
+    if (content === 'null') {
+      return undefined;
+    }
+    return content;
+  }
+
+  public getDigest(): string | undefined {
+    const metadata = this.getBuildMetadata();
+    if (metadata === undefined) {
+      return undefined;
+    }
+    const metadataJSON = JSON.parse(metadata);
+    if (metadataJSON['containerimage.digest']) {
+      return metadataJSON['containerimage.digest'];
+    }
+    return undefined;
+  }
+
+  public generateBuildSecretString(kvp: string): string {
+    return this.generateBuildSecret(kvp, false);
+  }
+
+  public generateBuildSecretFile(kvp: string): string {
+    return this.generateBuildSecret(kvp, true);
+  }
+
+  public generateBuildSecret(kvp: string, file: boolean): string {
+    const delimiterIndex = kvp.indexOf('=');
+    const key = kvp.substring(0, delimiterIndex);
+    let value = kvp.substring(delimiterIndex + 1);
+    if (key.length == 0 || value.length == 0) {
+      throw new Error(`${kvp} is not a valid secret`);
+    }
+    if (file) {
+      if (!fs.existsSync(value)) {
+        throw new Error(`secret file ${value} not found`);
+      }
+      value = fs.readFileSync(value, {encoding: 'utf-8'});
+    }
+    const secretFile = this.context.tmpName({tmpdir: this.context.tmpDir()});
+    fs.writeFileSync(secretFile, value);
+    return `id=${key},src=${secretFile}`;
+  }
+
+  public getProvenanceInput(name: string): string {
+    const input = core.getInput(name);
+    if (!input) {
+      // if input is not set returns empty string
+      return input;
+    }
+    const builderID = this.context.provenanceBuilderID;
+    try {
+      return core.getBooleanInput(name) ? `builder-id=${builderID}` : 'false';
+    } catch (err) {
+      // not a valid boolean, so we assume it's a string
+      return this.getProvenanceAttrs(input);
+    }
+  }
+
+  public getProvenanceAttrs(input: string): string {
+    if (!input) {
+      return `builder-id=${this.context.provenanceBuilderID}`;
+    }
+    // parse attributes from input
+    const fields = parse(input, {
+      relaxColumnCount: true,
+      skipEmptyLines: true
+    })[0];
+    // check if builder-id attribute exists in the input
+    for (const field of fields) {
+      const parts = field
+        .toString()
+        .split(/(?<=^[^=]+?)=/)
+        .map(item => item.trim());
+      if (parts[0] == 'builder-id') {
+        return input;
+      }
+    }
+    // if not add builder-id attribute
+    return `${input},builder-id=${this.context.provenanceBuilderID}`;
+  }
+
+  public static hasLocalExporter(exporters: string[]): boolean {
+    return Inputs.hasExporterType('local', exporters);
+  }
+
+  public static hasTarExporter(exporters: string[]): boolean {
+    return Inputs.hasExporterType('tar', exporters);
+  }
+
+  public static hasDockerExporter(exporters: string[], load?: boolean): boolean {
+    return load ?? Inputs.hasExporterType('docker', exporters);
+  }
+
+  public static hasExporterType(name: string, exporters: string[]): boolean {
+    const records = parse(exporters.join(`\n`), {
+      delimiter: ',',
+      trim: true,
+      columns: false,
+      relaxColumnCount: true
+    });
+    for (const record of records) {
+      if (record.length == 1 && !record[0].startsWith('type=')) {
+        // Local if no type is defined
+        // https://github.com/docker/buildx/blob/d2bf42f8b4784d83fde17acb3ed84703ddc2156b/build/output.go#L29-L43
+        return name == 'local';
+      }
+      for (const [key, value] of record.map(chunk => chunk.split('=').map(item => item.trim()))) {
+        if (key == 'type' && value == name) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+
+  public static hasGitAuthTokenSecret(secrets: string[]): boolean {
+    for (const secret of secrets) {
+      if (secret.startsWith('GIT_AUTH_TOKEN=')) {
+        return true;
+      }
+    }
+    return false;
+  }
+}