bootstrap.py: Add env variable NON_LOCAL_DEPS

... to indicate, in case of a package build, which dependencies
should not be taken from the local environment. As those need a
different target root (and potentially other roots), we keep a
copy of file roots modified when transitioning to local builds and
rewrite the changed file roots in the NON_LOCAL_DEPS accordingly.

Co-authored-by: Klaus Aehlig <aehlig@linta.de>

1 files changed, 26 insertions, 0 deletions

diff --git a/bin/bootstrap.py b/bin/bootstrap.py
index 12a97807..331950e5 100755
--- a/bin/bootstrap.py
+++ b/bin/bootstrap.py
@@ -83,6 +83,7 @@ SRCDIR = os.getcwd()
 WRKDIR = None
 DISTDIR = []
 LOCALBASE = "/"
+NON_LOCAL_DEPS = []
 
 # other global variables
 
@@ -185,7 +186,11 @@ def config_to_local(*, repos_file, link_targets_file):
     with open(repos_file) as f:
         repos = json.load(f)
     global_link_dirs = set()
+    changed_file_roots = {}
+    backup_layers = {}
     for repo in repos["repositories"]:
+        if repo in NON_LOCAL_DEPS:
+            continue
         desc = repos["repositories"][repo]
         repo_desc = desc.get("repository")
         if not isinstance(repo_desc, dict):
@@ -211,6 +216,14 @@ def config_to_local(*, repos_file, link_targets_file):
                 del desc["local_bootstrap"]
         if repo_desc.get("type") == "file":
             local_bootstrap = desc.get("local_bootstrap", {})
+            if local_bootstrap.get("local_path") and NON_LOCAL_DEPS:
+                # local layer gets changed, keep a copy
+                backup_name = "ORIGINAL: " + repo
+                backup_layers[backup_name] = {
+                    "repository": {"type": "file",
+                                   "path": repo_desc.get("path")
+                                   }}
+                changed_file_roots[repo] = backup_name
             desc["repository"] = {
                 "type": "file",
                 "path": local_bootstrap.get("local_path", desc["repository"].get("path"))
@@ -219,6 +232,17 @@ def config_to_local(*, repos_file, link_targets_file):
             if "local_bootstrap" in desc:
                 del desc["local_bootstrap"]
 
+    # For repos that we didn't change to local, make file roots point
+    # to the original version, so that, in particular, the original
+    # target root will be used.
+    for repo in NON_LOCAL_DEPS:
+        for layer in ["target_root", "rule_root", "expression_root"]:
+            layer_ref = repos["repositories"][repo].get(layer)
+            if layer_ref in changed_file_roots:
+                repos["repositories"][repo][layer] = changed_file_roots[layer_ref]
+
+    repos["repositories"] = dict(repos["repositories"], **backup_layers)
+
     print("just-mr config rewritten to local:\n%s\n"
           % (json.dumps(repos, indent=2)))
     os.unlink(repos_file)
@@ -331,6 +355,7 @@ def main(args):
     global DISTDIR
     global LOCAL_DEPS
     global LOCALBASE
+    global NON_LOCAL_DEPS
     if len(args) > 1:
         SRCDIR = os.path.abspath(args[1])
     if len(args) > 2:
@@ -345,6 +370,7 @@ def main(args):
 
     LOCAL_DEPS = "PACKAGE" in os.environ
     LOCALBASE = os.environ.get("LOCALBASE", "/")
+    NON_LOCAL_DEPS = json.loads(os.environ.get("NON_LOCAL_DEPS", "[]"))
     bootstrap()