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Diffstat (limited to 'node_modules/shelljs/src/sed.js')
-rw-r--r-- | node_modules/shelljs/src/sed.js | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/node_modules/shelljs/src/sed.js b/node_modules/shelljs/src/sed.js new file mode 100644 index 000000000..dfdc0a747 --- /dev/null +++ b/node_modules/shelljs/src/sed.js @@ -0,0 +1,86 @@ +var common = require('./common'); +var fs = require('fs'); + +common.register('sed', _sed, { + globStart: 3, // don't glob-expand regexes + canReceivePipe: true, + cmdOptions: { + 'i': 'inplace', + }, +}); + +//@ +//@ ### sed([options,] search_regex, replacement, file [, file ...]) +//@ ### sed([options,] search_regex, replacement, file_array) +//@ Available options: +//@ +//@ + `-i`: Replace contents of 'file' in-place. _Note that no backups will be created!_ +//@ +//@ Examples: +//@ +//@ ```javascript +//@ sed('-i', 'PROGRAM_VERSION', 'v0.1.3', 'source.js'); +//@ sed(/.*DELETE_THIS_LINE.*\n/, '', 'source.js'); +//@ ``` +//@ +//@ Reads an input string from `files` and performs a JavaScript `replace()` on the input +//@ using the given search regex and replacement string or function. Returns the new string after replacement. +//@ +//@ Note: +//@ +//@ Like unix `sed`, ShellJS `sed` supports capture groups. Capture groups are specified +//@ using the `$n` syntax: +//@ +//@ ```javascript +//@ sed(/(\w+)\s(\w+)/, '$2, $1', 'file.txt'); +//@ ``` +function _sed(options, regex, replacement, files) { + // Check if this is coming from a pipe + var pipe = common.readFromPipe(); + + if (typeof replacement !== 'string' && typeof replacement !== 'function') { + if (typeof replacement === 'number') { + replacement = replacement.toString(); // fallback + } else { + common.error('invalid replacement string'); + } + } + + // Convert all search strings to RegExp + if (typeof regex === 'string') { + regex = RegExp(regex); + } + + if (!files && !pipe) { + common.error('no files given'); + } + + files = [].slice.call(arguments, 3); + + if (pipe) { + files.unshift('-'); + } + + var sed = []; + files.forEach(function (file) { + if (!fs.existsSync(file) && file !== '-') { + common.error('no such file or directory: ' + file, 2, { continue: true }); + return; + } + + var contents = file === '-' ? pipe : fs.readFileSync(file, 'utf8'); + var lines = contents.split(/\r*\n/); + var result = lines.map(function (line) { + return line.replace(regex, replacement); + }).join('\n'); + + sed.push(result); + + if (options.inplace) { + fs.writeFileSync(file, result, 'utf8'); + } + }); + + return sed.join('\n'); +} +module.exports = _sed; |