import path from 'node:path';
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const SLUG_MAX = 50;
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/** Derive one clone-stable slug from a concrete file path or URL. */
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export function slugFromTarget(resolved, { cwd = process.cwd() } = {}) {
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if (!resolved || typeof resolved !== 'string') return null;
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const trimmed = resolved.trim();
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if (!trimmed) return null;
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if (/^https?:\/\//i.test(trimmed)) {
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let url;
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try { url = new URL(trimmed); } catch { return null; }
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return kebab(`${url.hostname}${url.pathname}`);
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}
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const abs = path.isAbsolute(trimmed) ? trimmed : path.resolve(cwd, trimmed);
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let rel = path.relative(cwd, abs);
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if (rel.startsWith('..') || path.isAbsolute(rel)) rel = path.basename(abs);
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if (!rel || rel === '.') return null;
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return kebab(rel);
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}
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export function kebab(value) {
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const slug = String(value || '')
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.toLowerCase()
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.replace(/[/\\.]+/g, '-')
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.replace(/[^a-z0-9-]+/g, '-')
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.replace(/-+/g, '-')
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.replace(/^-|-$/g, '');
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if (!slug) return null;
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return slug.length <= SLUG_MAX ? slug : slug.slice(slug.length - SLUG_MAX).replace(/^-/, '');
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}
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