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{"version":3,"file":"resolve-uri.umd.js","sources":["../../src/resolve-uri.ts"],"sourcesContent":["// Matches the scheme of a URL, eg \"http://\"\nconst schemeRegex = /^[\\w+.-]+:\\/\\//;\n\n/**\n * Matches the parts of a URL:\n * 1. Scheme, including \":\", guaranteed.\n * 2. User/password, including \"@\", optional.\n * 3. Host, guaranteed.\n * 4. Port, including \":\", optional.\n * 5. Path, including \"/\", optional.\n */\nconst urlRegex = /^([\\w+.-]+:)\\/\\/([^@/#?]*@)?([^:/#?]*)(:\\d+)?(\\/[^#?]*)?/;\n\ntype Url = {\n scheme: string;\n user: string;\n host: string;\n port: string;\n path: string;\n relativePath: boolean;\n};\n\nfunction isAbsoluteUrl(input: string): boolean {\n return schemeRegex.test(input);\n}\n\nfunction isSchemeRelativeUrl(input: string): boolean {\n return input.startsWith('//');\n}\n\nfunction isAbsolutePath(input: string): boolean {\n return input.startsWith('/');\n}\n\nfunction parseAbsoluteUrl(input: string): Url {\n const match = urlRegex.exec(input)!;\n return {\n scheme: match[1],\n user: match[2] || '',\n host: match[3],\n port: match[4] || '',\n path: match[5] || '/',\n relativePath: false,\n };\n}\n\nfunction parseUrl(input: string): Url {\n if (isSchemeRelativeUrl(input)) {\n const url = parseAbsoluteUrl('http:' + input);\n url.scheme = '';\n return url;\n }\n if (isAbsolutePath(input)) {\n const url = parseAbsoluteUrl('http://foo.com' + input);\n url.scheme = '';\n url.host = '';\n return url;\n }\n if (!isAbsoluteUrl(input)) {\n const url = parseAbsoluteUrl('http://foo.com/' + input);\n url.scheme = '';\n url.host = '';\n url.relativePath = true;\n return url;\n }\n return parseAbsoluteUrl(input);\n}\n\nfunction stripPathFilename(path: string): string {\n // If a path ends with a parent directory \"..\", then it's a relative path with excess parent\n // paths. 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But once we encounter a\n // real directory, we won't need to append, unless the other conditions happen again.\n let addTrailingSlash = false;\n\n for (let i = 1; i < pieces.length; i++) {\n const piece = pieces[i];\n\n // An empty directory, could be a trailing slash, or just a double \"//\" in the path.\n if (!piece) {\n addTrailingSlash = true;\n continue;\n }\n\n // If we encounter a real directory, then we don't need to append anymore.\n addTrailingSlash = false;\n\n // A current directory, which we can always drop.\n if (piece === '.') continue;\n\n // A parent directory, we need to see if there are any real directories we can pop. Else, we\n // have an excess of parents, and we'll need to keep the \"..\".\n if (piece === '..') {\n if (positive) {\n addTrailingSlash = true;\n positive--;\n pointer--;\n } else if (relativePath) {\n // If we're in a relativePath, then we need to keep the excess parents. 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Move it to the next insertion pointer, which accounts for\n // any popped or dropped directories.\n pieces[pointer++] = piece;\n positive++;\n }\n\n let path = '';\n for (let i = 1; i < pointer; i++) {\n path += '/' + pieces[i];\n }\n if (!path || (addTrailingSlash && !path.endsWith('/..'))) {\n path += '/';\n }\n url.path = path;\n}\n\n/**\n * Attempts to resolve `input` URL/path relative to `base`.\n */\nexport default function resolve(input: string, base: string | undefined): string {\n if (!input && !base) return '';\n\n const url = parseUrl(input);\n\n // If we have a base, and the input isn't already an absolute URL, then we need to merge.\n if (base && !url.scheme) {\n const baseUrl = parseUrl(base);\n url.scheme = baseUrl.scheme;\n // If there's no host, then we were just a path.\n if (!url.host || baseUrl.scheme === 'file:') {\n // The host, user, and port are joined, you can't copy one without the others.\n url.user = baseUrl.user;\n url.host = baseUrl.host;\n url.port = baseUrl.port;\n }\n mergePaths(url, baseUrl);\n }\n\n normalizePath(url);\n\n // If the input (and base, if there was one) are both relative, then we need to output a relative.\n if (url.relativePath) {\n // The first char is always a \"/\".\n const path = url.path.slice(1);\n if (!path) return '.';\n\n // If base started with a leading \".\", or there is no base and input started with a \".\", then we\n // need to ensure that the relative path starts with a \".\". 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