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30 lines
977 B
Nix
30 lines
977 B
Nix
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{ stdenv }:
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# helper functions for packaging programs with plugin systems
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{
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/* Takes a list of expected plugin names
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* and compares it to the found plugins given in the file,
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* one plugin per line.
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* If the lists differ, the build fails with a nice message.
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*
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* This is helpful to ensure maintainers don’t miss
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* the addition or removal of a plugin.
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*/
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diffPlugins = expectedPlugins: foundPluginsFilePath: ''
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# sort both lists first
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plugins_expected=$(mktemp)
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(${stdenv.lib.concatMapStrings (s: "echo \"${s}\";") expectedPlugins}) \
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| sort -u > "$plugins_expected"
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plugins_found=$(mktemp)
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sort -u "${foundPluginsFilePath}" > "$plugins_found"
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if ! mismatches="$(diff -y "$plugins_expected" "$plugins_found")"; then
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echo "The the list of expected plugins (left side) doesn't match" \
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"the list of plugins we found (right side):" >&2
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echo "$mismatches" >&2
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exit 1
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fi
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'';
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}
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