var parse = require('spdx-expression-parse');
|
var correct = require('spdx-correct');
|
|
var genericWarning = (
|
'license should be ' +
|
'a valid SPDX license expression (without "LicenseRef"), ' +
|
'"UNLICENSED", or ' +
|
'"SEE LICENSE IN <filename>"'
|
);
|
|
var fileReferenceRE = /^SEE LICEN[CS]E IN (.+)$/;
|
|
function startsWith(prefix, string) {
|
return string.slice(0, prefix.length) === prefix;
|
}
|
|
function usesLicenseRef(ast) {
|
if (ast.hasOwnProperty('license')) {
|
var license = ast.license;
|
return (
|
startsWith('LicenseRef', license) ||
|
startsWith('DocumentRef', license)
|
);
|
} else {
|
return (
|
usesLicenseRef(ast.left) ||
|
usesLicenseRef(ast.right)
|
);
|
}
|
}
|
|
module.exports = function(argument) {
|
var ast;
|
|
try {
|
ast = parse(argument);
|
} catch (e) {
|
var match
|
if (
|
argument === 'UNLICENSED' ||
|
argument === 'UNLICENCED'
|
) {
|
return {
|
validForOldPackages: true,
|
validForNewPackages: true,
|
unlicensed: true
|
};
|
} else if (match = fileReferenceRE.exec(argument)) {
|
return {
|
validForOldPackages: true,
|
validForNewPackages: true,
|
inFile: match[1]
|
};
|
} else {
|
var result = {
|
validForOldPackages: false,
|
validForNewPackages: false,
|
warnings: [genericWarning]
|
};
|
if (argument.trim().length !== 0) {
|
var corrected = correct(argument);
|
if (corrected) {
|
result.warnings.push(
|
'license is similar to the valid expression "' + corrected + '"'
|
);
|
}
|
}
|
return result;
|
}
|
}
|
|
if (usesLicenseRef(ast)) {
|
return {
|
validForNewPackages: false,
|
validForOldPackages: false,
|
spdx: true,
|
warnings: [genericWarning]
|
};
|
} else {
|
return {
|
validForNewPackages: true,
|
validForOldPackages: true,
|
spdx: true
|
};
|
}
|
};
|
