repo_missing: if abuild is forked, add it as dep (MR 2410)

In the systemd repository, we currently have a forked version of
abuild, which needs to be used to build all other packages. Check if we
have a forked abuild, and if it is the case, add it to the dependencies
of all other packages.

Closes: issue 2401

pmb/helpers/repo_missing.py

@@ -2,6 +2,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 from pmb.core.arch import Arch
 from pmb.core.context import get_context
+from pmb.meta import Cache
+from pmb.types import WithExtraRepos
 from pathlib import Path
 
 import pmb.build
@@ -11,6 +13,23 @@ import glob
 import os
 
 
+@Cache("repo")
+def is_abuild_forked(repo: str | None) -> bool:
+    """Check if abuild is forked to make sure we build it first (pmb#2401)"""
+    with_extra_repos: WithExtraRepos
+
+    if repo == "systemd":
+        with_extra_repos = "enabled"
+    elif repo is None:
+        with_extra_repos = "disabled"
+    else:
+        raise RuntimeError(f"Unexpected repo value: {repo}")
+
+    if pmb.helpers.pmaports.find("abuild", False, False, with_extra_repos):
+        return True
+    return False
+
+
 def generate(arch: Arch) -> list[dict[str, list[str] | str | None]]:
     """Get packages that need to be built, with all their dependencies. Include
        packages from extra-repos, no matter if systemd is enabled or not. This
@@ -42,6 +61,9 @@ def generate(arch: Arch) -> list[dict[str, list[str] | str | None]]:
             if entry is None:
                 raise RuntimeError(f"Couldn't get package {pkgname} for arch {arch}")
 
+            if pkgname != "abuild" and is_abuild_forked(repo):
+                entry.depends.insert(0, "abuild")
+
             ret += [
                 {
                     "pkgname": entry.pkgname,