example: add multi arch & repo example (#8)

Signed-off-by: thesayyn <thesayyn@gmail.com>

.gitignore

@@ -2,3 +2,4 @@ bazel-*
 .bazelrc.user
 .idea/
 .ijwb/
+.DS_Store

MODULE.bazel

@@ -41,6 +41,11 @@ apk.translate_lock(
     name = "examples_oci",
     lock = "//examples/oci:apko.lock.json",
 )
+apk.translate_lock(
+    name = "examples_multi_arch_and_repo",
+    lock = "//examples/multi_arch_and_repo:apko.lock.json",
+)
+use_repo(apk, "examples_multi_arch_and_repo")
 use_repo(apk, "examples_lock")
 use_repo(apk, "examples_wolfi_base")
 use_repo(apk, "examples_oci")

apko/private/apko_image.bzl

@@ -1,10 +1,11 @@
 "A rule for running apko with prepopulated cache"
 
 _ATTRS = {
-    "packages": attr.label(),
-    "tag": attr.string(mandatory = True),
+    "contents": attr.label(mandatory = True),
     "config": attr.label(allow_single_file = True, mandatory = True),
     "output": attr.string(default = "oci", values = ["oci", "docker"]),
+    "architecture": attr.string(),
+    "tag": attr.string(mandatory = True),
     "args": attr.string_list(),
 }
 
@@ -31,17 +32,21 @@ def _impl(ctx):
     args.add("--cache-dir={}/{}/{}".format(ctx.bin_dir.path, ctx.label.package, cache_name))
     args.add("--offline")
 
-    inputs = [ctx.file.config] + ctx.files.packages
+    if ctx.attr.architecture:
+        args.add("--arch")
+        args.add(ctx.attr.architecture)
+
+    inputs = [ctx.file.config] + ctx.files.contents
 
-    for package in ctx.files.packages:
-        package_owner = package.owner.workspace_name
-        package_cache_entry_key = package.path[package.path.find(package_owner) + len(package_owner) + 1:]
-        package_entry = ctx.actions.declare_file("/".join([cache_name, package_cache_entry_key]))
+    for content in ctx.files.contents:
+        content_owner = content.owner.workspace_name
+        content_cache_entry_key = content.path[content.path.find(content_owner) + len(content_owner) + 1:]
+        content_entry = ctx.actions.declare_file("/".join([cache_name, content_cache_entry_key]))
         ctx.actions.symlink(
-            target_file = package,
-            output = package_entry,
+            target_file = content,
+            output = content_entry,
         )
-        inputs.append(package_entry)
+        inputs.append(content_entry)
 
     ctx.actions.run(
         executable = apko_info.binary,

e2e/smoke/BUILD

@@ -8,7 +8,7 @@ apko_bazelrc()
 apko_image(
     name = "lock",
     config = "apko.yaml",
-    packages = "@example_lock//:contents",
+    contents = "@example_lock//:contents",
     tag = "lock:latest",
 )
 

examples/lock/BUILD.bazel

@@ -6,7 +6,7 @@ load("@bazel_skylib//rules:build_test.bzl", "build_test")
 apko_image(
     name = "lock",
     config = "apko.yaml",
-    packages = "@examples_lock//:contents",
+    contents = "@examples_lock//:contents",
     tag = "lock:latest",
 )
 

examples/multi_arch_and_repo/BUILD.bazel

@@ -0,0 +1,21 @@
+load("@rules_apko//apko:defs.bzl", "apko_image")
+load("@container_structure_test//:defs.bzl", "container_structure_test")
+
+# An example demonstrating how to use multi architecture alpine packages with a lock file.
+# See MODULE.bazel for how apko.lock.json is translated to @examples_multi_arch_and_repo//:contents
+apko_image(
+    name = "image",
+    architecture = select({
+        "@platforms//cpu:arm64": "arm64",
+        "@platforms//cpu:x86_64": "amd64",
+    }),
+    config = "apko.yaml",
+    contents = "@examples_multi_arch_and_repo//:contents",
+    tag = "multi_arch_and_repo:latest",
+)
+
+container_structure_test(
+    name = "test",
+    configs = ["test.yaml"],
+    image = ":image",
+)