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const path = require('path');
exports.PscError = class PscError extends Error {
constructor(message, modules) {
super(message);
this.modules = modules;
this.isPscError = true;
}
static get name() {
return 'PscError';
}
};
const repeat = (value, times) =>
times <= 0 ? [] : [value, ...repeat(value, times - 1)];
const diffPursModuleNames = (from, target, parts) => {
if (!from.length) return parts.concat(target);
if (!target.length) return parts.concat(repeat('..', from.length));
const [head_from, ...tail_from] = from;
const [head_target, ...tail_target] = target;
return head_from === head_target
? diffPursModuleNames(tail_from, tail_target, parts)
: parts.concat(repeat('..', from.length), target);
};
exports.resolvePursModule = ({ baseModulePath, baseModuleName, targetModuleName }) => {
const parts = diffPursModuleNames(
baseModuleName.split('.'),
targetModuleName.split('.'),
[]);
return parts.length
? path.resolve(baseModulePath,
`${path.join(...parts)}.purs`)
: baseModulePath;
};
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