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Fix materialization message #1635

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Merged
merged 2 commits into from
Aug 31, 2022
Merged

Fix materialization message #1635

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fef16a1
Fix materialization message
hamishmack Aug 31, 2022
cd36a0c
Use regex to determine if in store
hamishmack Aug 31, 2022
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15 changes: 12 additions & 3 deletions lib/materialize.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -83,9 +83,18 @@ let
fi
'')
+ (
let fixHint = if builtins.hasContext (toString materialized)
then "To fix run: ${updateMaterialized}"
else "To fix check you are in the right directory and run: ${generateMaterialized} ${__head (__match "/nix/store/[^/]*/(.*)" (toString materialized))}";
let
# When the materialized location is already in the store updateMaterialized
# will not work, but generateMaterialized will. We can use this regex to get
# a good idea of what directory might be (relative to some unknown parent).
# In the regex `[^/]*/?` skips the name of the /nix/store sub directory.
matches = __match "${builtins.storeDir}/[^/]*/?(.*)" (toString materialized);
fixHint =
if matches == null
then "To fix run: ${updateMaterialized}" # Not in store so updateMaterialized may work
else if __head matches == ""
then "To fix run: ${generateMaterialized} <materialized files location>"
else "To fix check you are in the right directory and run: ${generateMaterialized} ${__head matches}";
in if materialized != null && !__pathExists materialized
then ''
echo "Materialized nix used for ${name} is missing. ${fixHint}" >> $ERR
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