Share an imageId and extract the imageId from the docker output (#14804)

* Added methods to share an image id and to extract the imageId from the docker output

* bumped version to 2.0.4

common-npm-packages/docker-common-v2/containerimageutils.ts

@@ -188,3 +188,56 @@ function inspectImage(connection: ContainerConnection, imageName): any {
     }
 }
 
+export function shareBuiltImageId(builtImageId: string) {
+    const IMAGE_SEPARATOR_CHAR: string = ";";
+    const ENV_VARIABLE_MAX_SIZE = 32766;
+    let builtImages: string = tl.getVariable("DOCKER_TASK_BUILT_IMAGES");
+
+    if (builtImages && builtImages != "") {
+        const newImageId = `${IMAGE_SEPARATOR_CHAR}${builtImages}`;
+
+        if (newImageId.length + builtImages.length > ENV_VARIABLE_MAX_SIZE) {
+            tl.debug("Images id truncated maximum environment variable size reached.");
+            return;
+        }
+
+        builtImages += newImageId;
+    }
+    else {
+        builtImages = builtImageId;
+    }
+
+    tl.setVariable("DOCKER_TASK_BUILT_IMAGES", builtImages);
+}
+
+export function getImageIdFromBuildOutput(output: string): string {
+    const standardParser = (text: string): string => {
+        let parsedOutput: string[] = text.match(new RegExp("Successfully built ([0-9a-f]{12})", 'g'));
+
+        return !parsedOutput || parsedOutput.length == 0
+            ? ""
+            : parsedOutput[parsedOutput.length - 1].substring(19); // This remove the Succesfully built section
+    };
+
+    const buildKitParser = (text: string): string => {
+        let parsedOutput: string[] = text.match(new RegExp("writing image sha256:([0-9a-f]{64})", 'gi'));
+
+        return !parsedOutput || parsedOutput.length == 0
+            ? ""
+            : parsedOutput[parsedOutput.length - 1].substring(21, 33); // This remove the section Writing Image Sha256 and takes 12 characters from the Id.
+    }
+
+    try {
+        let buildOutputParserFuncs = [standardParser, buildKitParser];
+        for (let parserFunc of buildOutputParserFuncs) {
+            const builtImageId = parserFunc(output);
+            if (builtImageId) {
+                return builtImageId;
+            }
+        }
+    } catch (error) {
+        tl.debug(`An error occurred getting the image id from the docker ouput: ${error.message}`)
+    }
+
+    return "";
+}

common-npm-packages/docker-common-v2/package.json

@@ -1,6 +1,6 @@
 {
   "name": "azure-pipelines-tasks-docker-common-v2",
-  "version": "2.0.3",
+  "version": "2.0.4",
   "description": "Common Library for Azure Rest Calls",
   "repository": {
     "type": "git",