bc41b2db3d
This is useful for replacing code that cannot be easily handled by the generator, such as the tentative settings constructor in e-d-s.
81 lines
2.3 KiB
Nix
81 lines
2.3 KiB
Nix
{
|
|
runCommand,
|
|
git,
|
|
coccinelle,
|
|
python3,
|
|
}:
|
|
|
|
/*
|
|
Creates a patch that replaces every instantiation of GSettings in a C project
|
|
with a code that loads a GSettings schema from a hardcoded path.
|
|
|
|
This is useful so that libraries can find schemas even though Nix lacks
|
|
a standard location like /usr/share, where GSettings system could look for schemas.
|
|
The derivation is is somewhat dependency-heavy so it is best used as part of an update script.
|
|
|
|
For each schema id referenced in the source code (e.g. org.gnome.evolution),
|
|
a variable name such as `EVOLUTION` must be provided.
|
|
It will end up in the generated patch as `@EVOLUTION@` placeholder, which should be replaced at build time
|
|
with a path to the directory containing a `gschemas.compiled` file that includes the schema.
|
|
|
|
|
|
Arguments:
|
|
- `src`: source to generate the patch for.
|
|
|
|
- `schemaIdToVariableMapping`: attrset assigning schema ids to variable names.
|
|
All used schemas must be listed.
|
|
|
|
For example, `{ "org.gnome.evolution" = "EVOLUTION_SCHEMA_PATH"; }`
|
|
hardcodes looking for `org.gnome.evolution` into `@EVOLUTION_SCHEMA_PATH@`.
|
|
|
|
- `patches`: A list of patches to apply before generating the patch.
|
|
|
|
Example:
|
|
passthru = {
|
|
hardcodeGsettingsPatch = makeHardcodeGsettingsPatch {
|
|
inherit (finalAttrs) src;
|
|
schemaIdToVariableMapping = {
|
|
...
|
|
};
|
|
};
|
|
|
|
updateScript =
|
|
let
|
|
updateSource = ...;
|
|
updatePatch = _experimental-update-script-combinators.copyAttrOutputToFile "evolution-ews.hardcodeGsettingsPatch" ./hardcode-gsettings.patch;
|
|
in
|
|
_experimental-update-script-combinators.sequence [
|
|
updateSource
|
|
updatePatch
|
|
];
|
|
};
|
|
}
|
|
*/
|
|
{
|
|
src,
|
|
patches ? [ ],
|
|
schemaIdToVariableMapping,
|
|
}:
|
|
|
|
runCommand
|
|
"hardcode-gsettings.patch"
|
|
{
|
|
inherit src patches;
|
|
nativeBuildInputs = [
|
|
git
|
|
coccinelle
|
|
python3 # For patch script
|
|
];
|
|
}
|
|
''
|
|
unpackPhase
|
|
cd "''${sourceRoot:-.}"
|
|
patchPhase
|
|
set -x
|
|
cp ${builtins.toFile "glib-schema-to-var.json" (builtins.toJSON schemaIdToVariableMapping)} ./glib-schema-to-var.json
|
|
git init
|
|
git add -A
|
|
spatch --sp-file "${./hardcode-gsettings.cocci}" --dir . --in-place
|
|
git diff > "$out"
|
|
''
|