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{ lib, runCommandLocal, desktop-file-utils }:
# See https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html
{ name # The name of the desktop file
, type ? "Application"
, exec
, icon ? null
, comment ? null
, terminal ? false
, desktopName # The name of the application
, genericName ? null
, mimeType ? null
, categories ? null
, startupNotify ? null
, extraDesktopEntries ? {} # Extra key-value pairs to add to the [Desktop Entry] section. This may override other values
, extraEntries ? "" # Extra configuration. Will be appended to the end of the file and may thus contain extra sections
, fileValidation ? true # whether to validate resulting desktop file.
}:
let
# like builtins.toString, but null -> null instead of null -> ""
nullableToString = value: if value == null then null
else if builtins.isBool value then lib.boolToString value
else builtins.toString value;
# The [Desktop entry] section of the desktop file, as attribute set.
mainSection = {
"Type" = toString type;
"Exec" = nullableToString exec;
"Icon" = nullableToString icon;
"Comment" = nullableToString comment;
"Terminal" = nullableToString terminal;
"Name" = toString name;
"GenericName" = nullableToString genericName;
"MimeType" = nullableToString mimeType;
"Categories" = nullableToString categories;
"StartupNotify" = nullableToString startupNotify;
} // extraDesktopEntries;
# Map all entries to a list of lines
desktopFileStrings =
["[Desktop Entry]"]
++ builtins.filter
(v: v != null)
(lib.mapAttrsToList
(name: value: if value != null then "${name}=${value}" else null)
mainSection
)
++ (if extraEntries == "" then [] else ["${extraEntries}"]);
in
runCommandLocal "${name}.desktop" {}
(''
mkdir -p "$out/share/applications"
cat > "$out/share/applications/${name}.desktop" <<EOF
${builtins.concatStringsSep "\n" desktopFileStrings}
EOF
'' + lib.optionalString fileValidation ''
echo "Running desktop-file validation"
${desktop-file-utils}/bin/desktop-file-validate "$out/share/applications/${name}.desktop"
'')
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