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Diffstat (limited to 'node_modules/glob-to-regexp/index.js')
-rw-r--r-- | node_modules/glob-to-regexp/index.js | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/node_modules/glob-to-regexp/index.js b/node_modules/glob-to-regexp/index.js new file mode 100644 index 0000000..03bd090 --- /dev/null +++ b/node_modules/glob-to-regexp/index.js @@ -0,0 +1,131 @@ +module.exports = function (glob, opts) { + if (typeof glob !== 'string') { + throw new TypeError('Expected a string'); + } + + var str = String(glob); + + // The regexp we are building, as a string. + var reStr = ""; + + // Whether we are matching so called "extended" globs (like bash) and should + // support single character matching, matching ranges of characters, group + // matching, etc. + var extended = opts ? !!opts.extended : false; + + // When globstar is _false_ (default), '/foo/*' is translated a regexp like + // '^\/foo\/.*$' which will match any string beginning with '/foo/' + // When globstar is _true_, '/foo/*' is translated to regexp like + // '^\/foo\/[^/]*$' which will match any string beginning with '/foo/' BUT + // which does not have a '/' to the right of it. + // E.g. with '/foo/*' these will match: '/foo/bar', '/foo/bar.txt' but + // these will not '/foo/bar/baz', '/foo/bar/baz.txt' + // Lastely, when globstar is _true_, '/foo/**' is equivelant to '/foo/*' when + // globstar is _false_ + var globstar = opts ? !!opts.globstar : false; + + // If we are doing extended matching, this boolean is true when we are inside + // a group (eg {*.html,*.js}), and false otherwise. + var inGroup = false; + + // RegExp flags (eg "i" ) to pass in to RegExp constructor. + var flags = opts && typeof( opts.flags ) === "string" ? opts.flags : ""; + + var c; + for (var i = 0, len = str.length; i < len; i++) { + c = str[i]; + + switch (c) { + case "\\": + case "/": + case "$": + case "^": + case "+": + case ".": + case "(": + case ")": + case "=": + case "!": + case "|": + reStr += "\\" + c; + break; + + case "?": + if (extended) { + reStr += "."; + break; + } + + case "[": + case "]": + if (extended) { + reStr += c; + break; + } + + case "{": + if (extended) { + inGroup = true; + reStr += "("; + break; + } + + case "}": + if (extended) { + inGroup = false; + reStr += ")"; + break; + } + + case ",": + if (inGroup) { + reStr += "|"; + break; + } + reStr += "\\" + c; + break; + + case "*": + // Move over all consecutive "*"'s. + // Also store the previous and next characters + var prevChar = str[i - 1]; + var starCount = 1; + while(str[i + 1] === "*") { + starCount++; + i++; + } + var nextChar = str[i + 1]; + + if (!globstar) { + // globstar is disabled, so treat any number of "*" as one + reStr += ".*"; + } else { + // globstar is enabled, so determine if this is a globstar segment + var isGlobstar = starCount > 1 // multiple "*"'s + && (prevChar === "/" || prevChar === undefined) // from the start of the segment + && (nextChar === "/" || nextChar === undefined) // to the end of the segment + + if (isGlobstar) { + // it's a globstar, so match zero or more path segments + reStr += "(?:[^/]*(?:\/|$))*"; + i++; // move over the "/" + } else { + // it's not a globstar, so only match one path segment + reStr += "[^/]*"; + } + } + break; + + default: + reStr += c; + } + } + + // When regexp 'g' flag is specified don't + // constrain the regular expression with ^ & $ + if (!flags || !~flags.indexOf('g')) { + reStr = "^" + reStr + "$"; + } + + return new RegExp(reStr, flags); +}; |