third_party/factorio: init

We turn the existing experimental BUILD file into a nicely abstracted
starlark rule generator, for generating both external repositories and
container build rules from a single source of truth.

We also add 0.18.22 (which we already pushed via :push_latest).

Change-Id: I521d6e5cb9447eaf6f237671b7ef07d621cd9c77
diff --git a/WORKSPACE b/WORKSPACE
index 5af740d..411a361 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -133,50 +133,9 @@
     digest = "sha256:8f58236129e6547d92502a2e9d8f40129f45f15007beaeafb59fed4faffddb3e",
 )
 
-# HTTP stuff from the Internet
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
-
-http_file(
-    name = "factorio-headless-0.16.51",
-    urls = ["https://factorio.com/get-download/0.16.51/headless/linux64"],
-    sha256 = "6cb09f5ac87f16f8d5b43cef26c0ae26cc46a57a0382e253dfda032dc5bb367f",
-    downloaded_file_path = "factorio.tar.xz",
-)
-
-http_file(
-    name = "factorio-headless-0.17.41",
-    urls = ["https://factorio.com/get-download/0.17.41/headless/linux64"],
-    sha256 = "bf2d16b23c3bbd97e41889d3e27670b6d958fa3d50f0befb41d234f735e8e6d1",
-    downloaded_file_path = "factorio.tar.xz",
-)
-
-http_file(
-    name = "factorio-headless-0.17.52",
-    urls = ["https://factorio.com/get-download/0.17.52/headless/linux64"],
-    sha256 = "24458a4e16875b0b63677b7e7a068ce2e5b298c110381d17c6f596fd1406db0e",
-    downloaded_file_path = "factorio.tar.xz",
-)
-
-http_file(
-    name = "factorio-headless-0.17.79",
-    urls = ["https://factorio.com/get-download/0.17.79/headless/linux64"],
-    sha256 = "9ace12fa986df028dc1851bf4de2cb038044d743e98823bc1c48ba21aa4d23df",
-    downloaded_file_path = "factorio.tar.xz",
-)
-
-http_file(
-    name = "factorio-headless-0.18.12",
-    urls = ["https://factorio.com/get-download/0.18.12/headless/linux64"],
-    sha256 = "e0c6a46d66cfc02cba294a5fd34265e7e7a5168b8c8a7b16ad8dbac31470ed33",
-    downloaded_file_path = "factorio.tar.xz",
-)
-
-http_file(
-    name = "factorio-headless-0.18.17",
-    urls = ["https://factorio.com/get-download/0.18.17/headless/linux64"],
-    sha256 = "42adce9fddde393023afb0aae19dd030a32ca0810191c0e7b9b7c55556e9bbce",
-    downloaded_file_path = "factorio.tar.xz",
-)
+# third_party/factorio
+load("//third_party/factorio:factorio.bzl", "factorio_repositories")
+factorio_repositories()
 
 # Go rules
 
diff --git a/personal/q3k/factorio/BUILD b/personal/q3k/factorio/BUILD
deleted file mode 100644
index 7a0a49d..0000000
--- a/personal/q3k/factorio/BUILD
+++ /dev/null
@@ -1,65 +0,0 @@
-load("@io_bazel_rules_docker//container:container.bzl", "container_image")
-load("@io_bazel_rules_docker//container:container.bzl", "container_push")
-
-container_image(
-    name="0.16.51-1",
-    base="@prodimage-bionic//image",
-    tars = ["@factorio-headless-0.16.51//file"],
-    files = [":entrypoint.sh"],
-    directory = "/",
-    entrypoint = ["/entrypoint.sh"],
-)
-
-container_image(
-    name="0.17.41-1",
-    base="@prodimage-bionic//image",
-    tars = ["@factorio-headless-0.17.41//file"],
-    files = [":entrypoint.sh"],
-    directory = "/",
-    entrypoint = ["/entrypoint.sh"],
-)
-
-container_image(
-    name="0.17.52-1",
-    base="@prodimage-bionic//image",
-    tars = ["@factorio-headless-0.17.52//file"],
-    files = [":entrypoint.sh"],
-    directory = "/",
-    entrypoint = ["/entrypoint.sh"],
-)
-
-container_image(
-    name="0.17.79-1",
-    base="@prodimage-bionic//image",
-    tars = ["@factorio-headless-0.17.79//file"],
-    files = [":entrypoint.sh"],
-    directory = "/",
-    entrypoint = ["/entrypoint.sh"],
-)
-
-container_image(
-    name="0.18.12-2",
-    base="@prodimage-bionic//image",
-    tars = ["@factorio-headless-0.18.12//file"],
-    files = [":entrypoint.sh"],
-    directory = "/",
-    entrypoint = ["/entrypoint.sh"],
-)
-
-container_image(
-    name="0.18.17-1",
-    base="@prodimage-bionic//image",
-    tars = ["@factorio-headless-0.18.17//file"],
-    files = [":entrypoint.sh"],
-    directory = "/",
-    entrypoint = ["/entrypoint.sh"],
-)
-
-container_push(
-    name = "push_latest",
-    image = ":0.18.17-1",
-    format = "Docker",
-    registry = "registry.k0.hswaw.net",
-    repository = "app/factorio",
-    tag = "0.18.17-1",
-)
diff --git a/third_party/factorio/BUILD b/third_party/factorio/BUILD
new file mode 100644
index 0000000..1028dc0
--- /dev/null
+++ b/third_party/factorio/BUILD
@@ -0,0 +1,3 @@
+load("//third_party/factorio:factorio.bzl", "factorio_images")
+
+factorio_images()
diff --git a/third_party/factorio/README.md b/third_party/factorio/README.md
new file mode 100644
index 0000000..22c7392
--- /dev/null
+++ b/third_party/factorio/README.md
@@ -0,0 +1,6 @@
+Factorio
+========
+
+We allow importing [Factorio](https://factorio.com/) server binaries into hscloud. A machinery is provided that builds Docker images for a given version of factorio and pushes them to `registry.k0.hswaw.net/app/factorio:${version}-${revision}`. Available versions are defined in [factorio.bzl](factorio.bzl).
+
+Production deployments of Factorio are still experimental, see [personal/q3k/factorio](/personal/q3k/factorio).
diff --git a/personal/q3k/factorio/entrypoint.sh b/third_party/factorio/entrypoint.sh
similarity index 100%
rename from personal/q3k/factorio/entrypoint.sh
rename to third_party/factorio/entrypoint.sh
diff --git a/third_party/factorio/factorio.bzl b/third_party/factorio/factorio.bzl
new file mode 100644
index 0000000..b0d661e
--- /dev/null
+++ b/third_party/factorio/factorio.bzl
@@ -0,0 +1,81 @@
+"""
+Automatically download, package, containerize and push Factorio server images.
+
+For each version defined, the following will be declared:
+  - @factorio-headless-${version}: a repository containing the factorio server tarball
+  - //third_party/factorio:${version}-1: a container_image rule to build a docker container running a factorio server
+  - //third_party/factorio:push_${version}-1: a container_push rule to push that container image to registry.k0.hswaw.net/app/factorio:${version}-1
+
+In addition, a //third_party/factorio:push_latest rule will also be created for the highest versioned server version. This is for convenience.
+
+To add a new version of Factorio, just update the _versions map with the new version number and the sha256 sum of its tarball.
+"""
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
+load("@io_bazel_rules_docker//container:container.bzl", "container_image", "container_push")
+
+# version -> sha256 of server tarball
+_versions = {
+    "0.16.51": "6cb09f5ac87f16f8d5b43cef26c0ae26cc46a57a0382e253dfda032dc5bb367f",
+    "0.17.41": "bf2d16b23c3bbd97e41889d3e27670b6d958fa3d50f0befb41d234f735e8e6d1",
+    "0.17.52": "24458a4e16875b0b63677b7e7a068ce2e5b298c110381d17c6f596fd1406db0e",
+    "0.17.79": "9ace12fa986df028dc1851bf4de2cb038044d743e98823bc1c48ba21aa4d23df",
+    "0.18.12": "e0c6a46d66cfc02cba294a5fd34265e7e7a5168b8c8a7b16ad8dbac31470ed33",
+    "0.18.17": "42adce9fddde393023afb0aae19dd030a32ca0810191c0e7b9b7c55556e9bbce",
+    "0.18.22": "d90e349b61182c1e48bd34797faedc2f9b5b4e349d218ef3d987ae9d90762f7f",
+}
+
+def factorio_repository(version, sha256):
+    http_file(
+        name = "factorio-headless-%s" % (version),
+        urls = [
+            "https://factorio.com/get-download/%s/headless/linux64" % (version),
+        ],
+        sha256 = sha256,
+        downloaded_file_path = "factorio.tar.xz",
+    )
+
+def factorio_repositories():
+    for v, sha256 in _versions.items():
+        factorio_repository(v, sha256)
+
+def factorio_image(version, revision):
+    image_name = "%s-%d" % (version, revision)
+    container_image(
+        name = image_name,
+        base = "@prodimage-bionic//image",
+        tars = ["@factorio-headless-%s//file" % (version)],
+        files = [":entrypoint.sh"],
+        directory = "/",
+        entrypoint = ["/entrypoint.sh"],
+    )
+    container_push(
+        name = "push_%s-%d" % (version, revision),
+        image = ":%s" % (image_name),
+        format = "Docker",
+        registry = "registry.k0.hswaw.net",
+        repository = "app/factorio",
+        tag = "%s-%d" % (version, revision),
+    )
+
+def _sort_by_version(v):
+    return [int(el) for el in v.split(".")]
+
+def factorio_images():
+    revision_overrides = {
+        "0.18.12": 2,
+    }
+    for v in _versions.keys():
+        revision = revision_overrides.get(v, 1)
+        factorio_image(v, revision)
+
+    highest_version = sorted(_versions.keys(), key=_sort_by_version, reverse=True)[0]
+    revision = revision_overrides.get(highest_version, 1)
+    container_push(
+        name = "push_latest",
+        image = ":%s-%d" % (highest_version, revision),
+        format = "Docker",
+        registry = "registry.k0.hswaw.net",
+        repository = "app/factorio",
+        tag = "%s-%d" % (highest_version, revision),
+    )