external: split out the depsolve external

This splits out the depsolve external along the lines of the previously
written partition externals. Using the external is now a two-step
process where you run one external in a define and then use its output
to generate stages and sources.

Signed-off-by: Simon de Vlieger <supakeen@redhat.com>

pyproject.toml

@@ -9,7 +9,9 @@ dependencies = [
 
 [project.scripts]
 otk = "otk.command:root"
-otk_external_osbuild = "otk_external_osbuild.command:root"
+osbuild-depsolve-dnf4 = "otk_external_osbuild.command.depsolve_dnf4:root"
+osbuild-depsolve-dnf4-gen-rpm-stage = "otk_external_osbuild.command.depsolve_dnf4_gen_rpm_stage:root"
+osbuild-depsolve-dnf4-gen-curl-source = "otk_external_osbuild.command.depsolve_dnf4_gen_curl_source:root"
 
 [project.optional-dependencies]
 dev = [

src/otk_external_osbuild/command/depsolve_dnf4.py

@@ -0,0 +1,66 @@
+"""`otk-osbuild` is the [otk](https://github.com/osbuild/otk) external to work
+with [osbuild](https://github.com/osbuild/osbuild) manifests.
+
+THIS FILE IS VERY, VERY PROOF OF CONCEPT AND NEEDS TO BE CLEANED UP"""
+
+import json
+import subprocess
+import sys
+
+
+def root():
+    data = json.loads(sys.stdin.read())
+
+    tree = data["tree"]
+
+    request = {
+        "command": "depsolve",
+        "arch": tree["architecture"],
+        "module_platform_id": "platform:" + tree["module_platform_id"],
+        "releasever": tree["releasever"],
+        "cachedir": "/tmp",
+        "arguments": {
+            "root_dir": "/tmp",
+            "repos": tree["repositories"],
+            "transactions": [
+                {
+                    "package-specs": tree["packages"]["include"],
+                    "exclude-specs": tree["packages"].get("exclude", []),
+                },
+            ],
+        },
+    }
+
+    process = subprocess.run(
+        ["/usr/libexec/osbuild-depsolve-dnf"],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        input=json.dumps(request),
+        encoding="utf8",
+        check=False,
+    )
+
+    if process.returncode != 0:
+        # TODO: fix this
+        raise RuntimeError(
+            process.stderr
+        )  # pylint: disable=broad-exception-raised
+
+    results = json.loads(process.stdout)
+    packages = results.get("packages", [])
+
+    sys.stdout.write(
+        json.dumps(
+            {
+                "tree": packages,
+            },
+        ),
+    )
+
+
+def main():
+    root()
+
+
+if __name__ == "__main__":
+    main()

src/otk_external_osbuild/command/depsolve_dnf4_gen_curl_source.py

@@ -0,0 +1,36 @@
+"""`otk-osbuild` is the [otk](https://github.com/osbuild/otk) external to work
+with [osbuild](https://github.com/osbuild/osbuild) manifests.
+
+THIS FILE IS VERY, VERY PROOF OF CONCEPT AND NEEDS TO BE CLEANED UP"""
+
+import itertools
+import json
+import sys
+
+
+def root():
+    data = json.load(sys.stdin)
+    tree = data["tree"]
+
+    sources = {"org.osbuild.curl": {"items": {}}}
+
+    for package in itertools.chain.from_iterable(tree["packages"]):
+        sources["org.osbuild.curl"]["items"][package["checksum"]] = {
+            "url": package["remote_location"],
+        }
+
+    sys.stdout.write(
+        json.dumps(
+            {
+                "tree": sources,
+            }
+        )
+    )
+
+
+def main():
+    root()
+
+
+if __name__ == "__main__":
+    main()

src/otk_external_osbuild/command/depsolve_dnf4_gen_rpm_stage.py

@@ -0,0 +1,45 @@
+"""`otk-osbuild` is the [otk](https://github.com/osbuild/otk) external to work
+with [osbuild](https://github.com/osbuild/osbuild) manifests.
+
+THIS FILE IS VERY, VERY PROOF OF CONCEPT AND NEEDS TO BE CLEANED UP"""
+
+import json
+import sys
+
+
+def root():
+    data = json.load(sys.stdin)
+    tree = data["tree"]
+
+    sys.stdout.write(
+        json.dumps(
+            {
+                "tree": {
+                    "type": "org.osbuild.rpm",
+                    "inputs": {
+                        "origin": "org.osbuild.source",
+                        "references": [
+                            {
+                                "id": package["checksum"],
+                                "options": {
+                                    "metadata": {"rpm.check_gpg": True}
+                                },
+                            }
+                            for package in tree["packages"]
+                        ],
+                    },
+                    "options": {
+                        "gpgkeys": tree["gpgkeys"],
+                    },
+                }
+            }
+        )
+    )
+
+
+def main():
+    root()
+
+
+if __name__ == "__main__":
+    main()