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fix: preserve source_cache config when writing install_tree #303

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Merged
bcumming merged 1 commit into from
Jul 6, 2026
Merged

fix: preserve source_cache config when writing install_tree #303

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10 changes: 8 additions & 2 deletions stackinator/builder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -260,8 +260,14 @@ def generate(self, recipe):
with (config_path / "packages.yaml").open("w") as f:
f.write(yaml.dump(recipe.packages["build"]))

config_yaml = {"config": {"install_tree": {"root": str(recipe.mount)}}}
with (config_path / "config.yaml").open("w") as f:
# Merge install_tree into any config.yaml the mirror layer already wrote
# (e.g. config:source_cache from mirrors.yaml at lines 167-170 above).
config_file = config_path / "config.yaml"
config_yaml = {}
if config_file.exists():
config_yaml = yaml.safe_load(config_file.read_text()) or {}
config_yaml.setdefault("config", {})["install_tree"] = {"root": str(recipe.mount)}
with config_file.open("w") as f:
f.write(yaml.dump(config_yaml))

# Add custom spack package recipes, configured via Spack repos.
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