First pass through changelog.com Europa port

Uses the low-level engine API.

⚠️ Is _not_ complete!

Signed-off-by: Joel Longtine <joel@dagger.io>

europa-universe/examples/changelog.com/lowlevel/main.cue

@@ -0,0 +1,175 @@
+package main
+
+import (
+	"alpha.dagger.io/europa/dagger/engine"
+)
+
+runtime_image_ref: string | *"thechangelog/runtime:2021-05-29T10.17.12Z"
+
+engine.#Plan & {
+	inputs: directories: app: {
+		path: "."
+		exclude: [
+			".circleci",
+			".dagger",
+			".git",
+			".github",
+			"2021",
+			"2022",
+			"_build/dev",
+			"_build/test",
+			"assets/node_modules",
+			"cue.mod",
+			"dev_docker",
+			"docker",
+			"import",
+			"nginx",
+			"priv/db",
+			"priv/uploads",
+			"script",
+			"tmp",
+			".all-contributorsrc",
+			".autocomplete",
+			".credo.exs",
+			".dockerignore",
+			".formatter.exs",
+			".envrc",
+			".env",
+			".gitattributes",
+			".gitignore",
+			"README.md",
+			"coveralls.json",
+			"start_dev_stack.sh",
+			".kube",
+			"erl_crash.dump",
+			"deps",
+			"_build",
+			"dagger",
+			"main.cue",
+		]
+	}
+	inputs: directories: docker: {
+		path: "."
+		include: [
+			"docker/Dockerfile.production",
+			".dockerignore",
+		]
+	}
+
+	actions: {
+		runtimeImage: engine.#Pull & {
+			source: runtime_image_ref
+		}
+
+		depsCache: engine.#CacheDir & {
+			id: "depsCache"
+		}
+
+		depsCacheMount: "depsCache": {
+			dest:     *"/app/deps/" | string
+			contents: depsCache
+		}
+
+		buildCacheTest: engine.#CacheDir & {
+			id: "buildCacheTest"
+		}
+
+		buildCacheTestMount: "buildCacheTest": {
+			dest:     *"/app/_build/test" | string
+			contents: buildCacheTest
+		}
+
+		buildCacheProd: engine.#CacheDir & {
+			id: "buildCacheProd"
+		}
+
+		buildCacheProdMount: "buildCacheProd": {
+			dest:     *"/app/_build/prod" | string
+			contents: buildCacheProd
+		}
+
+		nodeModulesCache: engine.#CacheDir & {
+			id: "nodeModulesCache"
+		}
+
+		nodeModulesCacheMount: "nodeModulesCache": {
+			dest:     *"/app/assets/node_modules" | string
+			contents: nodeModulesCache
+		}
+
+		appImage: engine.#Copy & {
+			input: runtimeImage.output
+			source: {
+				root: inputs.directories.app.contents
+			}
+			dest: "/app"
+		}
+
+		deps: engine.#Exec & {
+			input:   appImage.output
+			mounts:  depsCacheMount
+			workdir: "/app"
+			args: ["bash", "-c", " mix deps.get"]
+		}
+
+		assetsCompile: engine.#Exec & {
+			input:   depsCompileProd.output
+			mounts:  depsCacheMount & nodeModulesCacheMount
+			workdir: "/app/assets"
+			env: PATH: "/usr/local/lib/nodejs/node-v14.17.0-linux-x64/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+			args: ["bash", "-c", "yarn install --frozen-lockfile && yarn run compile"]
+		}
+
+		#depsCompile: engine.#Exec & {
+			input:   deps.output
+			mounts:  depsCacheMount
+			workdir: "/app"
+			args: ["bash", "-c", "mix do deps.compile, compile"]
+		}
+
+		depsCompileTest: #depsCompile & {
+			env: MIX_ENV: "test"
+			mounts: buildCacheTestMount
+		}
+
+		depsCompileProd: #depsCompile & {
+			env: MIX_ENV: "prod"
+			mounts: buildCacheProdMount
+		}
+
+		assetsDigest: engine.#Exec & {
+			input:  assetsCompile.output
+			mounts: depsCacheMount & buildCacheProdMount & nodeModulesCacheMount
+			env: MIX_ENV: "prod"
+			workdir: "/app"
+			args: ["bash", "-c", "mix phx.digest"]
+		}
+
+		imageProdCacheCopy: engine.#Exec & {
+			input:  assetsDigest.output
+			mounts: (depsCacheMount & {depsCache: dest:           "/mnt/app/deps/"} )
+			mounts: (buildCacheProdMount & {buildCacheProd: dest: "/mnt/app/_build/prod"} )
+			args: ["bash", "-c", "cp -Rp /mnt/app/deps/* /app/deps/ && cp -Rp /mnt/app/_build/prod/* /app/_build/prod/"]
+		}
+
+		imageProdDockerCopy: engine.#Copy & {
+			input: imageProdCacheCopy.output
+			source: {
+				root: inputs.directories.docker.contents
+			}
+			dest: "/"
+		}
+
+		imageProd: engine.#Build & {
+			source: imageProdDockerCopy.output
+			dockerfile: path: "/docker/Dockerfile.production"
+			buildArg: {
+				APP_FROM_PATH: "/app"
+				GIT_AUTHOR:    "joel"
+				GIT_SHA:       "abcdef"
+				APP_VERSION:   "main"
+				BUILD_URL:     "longtine.io/build"
+			}
+		}
+	}
+}