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/**
* Parses all the paths of the typescript `import` statements from content
* @param path the current path of the file
* @param content the file content
* @returns the list of import paths
*/
export function parseImports(path: string, content: string): string[] {
const out: string[] = [];
const importRE = /^import\s[^'"]*(['"])([./\w]*)(\1);/gm;
let importMatch: RegExpMatchArray | null;
while ((importMatch = importRE.exec(content))) {
const importPath = importMatch[2].replace(`'`, '').replace(`"`, '');
out.push(joinPath(path, importPath));
}
return out;
}
function joinPath(a: string, b: string): string {
const aParts = a.split('/');
const bParts = b.split('/');
aParts.pop(); // remove file
let bStart = 0;
while (aParts.length > 0) {
switch (bParts[bStart]) {
case '.':
bStart++;
continue;
case '..':
aParts.pop();
bStart++;
continue;
}
break;
}
return [...aParts, ...bParts.slice(bStart)].join('/');
}
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