update

node_modules/picomatch/lib/scan.js

@@ -0,0 +1,222 @@
+'use strict';
+
+const utils = require('./utils');
+const {
+  CHAR_ASTERISK,             /* * */
+  CHAR_AT,                   /* @ */
+  CHAR_BACKWARD_SLASH,       /* \ */
+  CHAR_COMMA,                /* , */
+  CHAR_DOT,                  /* . */
+  CHAR_EXCLAMATION_MARK,     /* ! */
+  CHAR_FORWARD_SLASH,        /* / */
+  CHAR_LEFT_CURLY_BRACE,     /* { */
+  CHAR_LEFT_PARENTHESES,     /* ( */
+  CHAR_LEFT_SQUARE_BRACKET,  /* [ */
+  CHAR_PLUS,                 /* + */
+  CHAR_QUESTION_MARK,        /* ? */
+  CHAR_RIGHT_CURLY_BRACE,    /* } */
+  CHAR_RIGHT_PARENTHESES,    /* ) */
+  CHAR_RIGHT_SQUARE_BRACKET  /* ] */
+} = require('./constants');
+
+const isPathSeparator = code => {
+  return code === CHAR_FORWARD_SLASH || code === CHAR_BACKWARD_SLASH;
+};
+
+/**
+ * Quickly scans a glob pattern and returns an object with a handful of
+ * useful properties, like `isGlob`, `path` (the leading non-glob, if it exists),
+ * `glob` (the actual pattern), and `negated` (true if the path starts with `!`).
+ *
+ * ```js
+ * const pm = require('picomatch');
+ * console.log(pm.scan('foo/bar/*.js'));
+ * { isGlob: true, input: 'foo/bar/*.js', base: 'foo/bar', glob: '*.js' }
+ * ```
+ * @param {String} `str`
+ * @param {Object} `options`
+ * @return {Object} Returns an object with tokens and regex source string.
+ * @api public
+ */
+
+module.exports = (input, options) => {
+  const opts = options || {};
+  const length = input.length - 1;
+  let index = -1;
+  let start = 0;
+  let lastIndex = 0;
+  let isGlob = false;
+  let backslashes = false;
+  let negated = false;
+  let braces = 0;
+  let prev;
+  let code;
+
+  let braceEscaped = false;
+
+  const eos = () => index >= length;
+  const advance = () => {
+    prev = code;
+    return input.charCodeAt(++index);
+  };
+
+  while (index < length) {
+    code = advance();
+    let next;
+
+    if (code === CHAR_BACKWARD_SLASH) {
+      backslashes = true;
+      next = advance();
+
+      if (next === CHAR_LEFT_CURLY_BRACE) {
+        braceEscaped = true;
+      }
+      continue;
+    }
+
+    if (braceEscaped === true || code === CHAR_LEFT_CURLY_BRACE) {
+      braces++;
+
+      while (!eos() && (next = advance())) {
+        if (next === CHAR_BACKWARD_SLASH) {
+          backslashes = true;
+          next = advance();
+          continue;
+        }
+
+        if (next === CHAR_LEFT_CURLY_BRACE) {
+          braces++;
+          continue;
+        }
+
+        if (!braceEscaped && next === CHAR_DOT && (next = advance()) === CHAR_DOT) {
+          isGlob = true;
+          break;
+        }
+
+        if (!braceEscaped && next === CHAR_COMMA) {
+          isGlob = true;
+          break;
+        }
+
+        if (next === CHAR_RIGHT_CURLY_BRACE) {
+          braces--;
+          if (braces === 0) {
+            braceEscaped = false;
+            break;
+          }
+        }
+      }
+    }
+
+    if (code === CHAR_FORWARD_SLASH) {
+      if (prev === CHAR_DOT && index === (start + 1)) {
+        start += 2;
+        continue;
+      }
+
+      lastIndex = index + 1;
+      continue;
+    }
+
+    if (code === CHAR_ASTERISK) {
+      isGlob = true;
+      break;
+    }
+
+    if (code === CHAR_ASTERISK || code === CHAR_QUESTION_MARK) {
+      isGlob = true;
+      break;
+    }
+
+    if (code === CHAR_LEFT_SQUARE_BRACKET) {
+      while (!eos() && (next = advance())) {
+        if (next === CHAR_BACKWARD_SLASH) {
+          backslashes = true;
+          next = advance();
+          continue;
+        }
+
+        if (next === CHAR_RIGHT_SQUARE_BRACKET) {
+          isGlob = true;
+          break;
+        }
+      }
+    }
+
+    const isExtglobChar = code === CHAR_PLUS
+      || code === CHAR_AT
+      || code === CHAR_EXCLAMATION_MARK;
+
+    if (isExtglobChar && input.charCodeAt(index + 1) === CHAR_LEFT_PARENTHESES) {
+      isGlob = true;
+      break;
+    }
+
+    if (!opts.nonegate && code === CHAR_EXCLAMATION_MARK && index === start) {
+      negated = true;
+      start++;
+      continue;
+    }
+
+    if (opts.noparen !== true && code === CHAR_LEFT_PARENTHESES) {
+      while (!eos() && (code = advance())) {
+        if (code === CHAR_BACKWARD_SLASH) {
+          backslashes = true;
+          code = advance();
+          continue;
+        }
+
+        if (code === CHAR_RIGHT_PARENTHESES) {
+          isGlob = true;
+          break;
+        }
+      }
+    }
+
+    if (isGlob) {
+      break;
+    }
+  }
+
+  if (opts.noext === true) {
+    isGlob = false;
+  }
+
+  let prefix = '';
+  const orig = input;
+  let base = input;
+  let glob = '';
+
+  if (start > 0) {
+    prefix = input.slice(0, start);
+    input = input.slice(start);
+    lastIndex -= start;
+  }
+
+  if (base && isGlob === true && lastIndex > 0) {
+    base = input.slice(0, lastIndex);
+    glob = input.slice(lastIndex);
+  } else if (isGlob === true) {
+    base = '';
+    glob = input;
+  } else {
+    base = input;
+  }
+
+  if (base && base !== '' && base !== '/' && base !== input) {
+    if (isPathSeparator(base.charCodeAt(base.length - 1))) {
+      base = base.slice(0, -1);
+    }
+  }
+
+  if (opts.unescape === true) {
+    if (glob) glob = utils.removeBackslashes(glob);
+
+    if (base && backslashes === true) {
+      base = utils.removeBackslashes(base);
+    }
+  }
+
+  return { prefix, input: orig, base, glob, negated, isGlob };
+};