pmbootstrap build, install: require repo_bootstrap (MR 2273)

Make sure that if systemd is selected, the repo_bootstrap is done before
the "pmbootstrap build" and "pmbootstrap install" commands can be used.

pmb/helpers/frontend.py

@@ -111,6 +111,12 @@ def build(args):
     if src and not os.path.exists(src):
         raise RuntimeError("Invalid path specified for --src: " + src)
 
+    # Ensure repo_bootstrap is done for all arches we intend to build for
+    for package in args.packages:
+        arch_package = args.arch or pmb.build.autodetect.arch(args, package)
+        pmb.helpers.repo_bootstrap.require_bootstrap(args, arch_package,
+            f"build {package} for {arch_package}")
+
     # Build all packages
     for package in args.packages:
         arch_package = args.arch or pmb.build.autodetect.arch(args, package)
@@ -251,6 +257,10 @@ def install(args):
         raise ValueError("Installation using rsync"
                         " is not currently supported on btrfs filesystem.")
 
+    pmb.helpers.repo_bootstrap.require_bootstrap(args, args.deviceinfo["arch"],
+        f"do 'pmbootstrap install' for {args.deviceinfo['arch']}"
+        " (deviceinfo_arch)")
+
     # On-device installer checks
     # Note that this can't be in the mutually exclusive group that has most of
     # the conflicting options, because then it would not work with --disk.

pmb/helpers/repo_bootstrap.py

@@ -155,3 +155,33 @@ def main(args):
 
     set_progress_total(args, steps, arch)
     run_steps(args, steps, arch, suffix)
+
+
+def require_bootstrap_error(repo, arch, trigger_str):
+    """
+    Tell the user that they need to do repo_bootstrap, with some context.
+
+    :param repo: which repository
+    :param arch: for which architecture
+    :param trigger_str: message for the user to understand what caused this
+    """
+    logging.info(f"ERROR: Trying to {trigger_str} with {repo} enabled, but the"
+                 f" {repo} repo needs to be bootstrapped first.")
+    raise RuntimeError(f"Run 'pmbootstrap repo_bootstrap {repo} --arch={arch}'"
+                       " and then try again.")
+
+
+def require_bootstrap(args, arch, trigger_str):
+    """
+    Check if repo_bootstrap was done, if any is needed.
+
+    :param arch: for which architecture
+    :param trigger_str: message for the user to understand what caused this
+    """
+    cfg = pmb.config.pmaports.read_config_repos(args)
+
+    if "systemd" in cfg and pmb.config.other.is_systemd_selected(args):
+        pkg = pmb.parse.apkindex.package(args, "postmarketos-base-systemd",
+                                         arch, False)
+        if not pkg:
+            require_bootstrap_error("systemd", arch, trigger_str)