## Massren [![Build Status](https://travis-ci.org/laurent22/massren.png)](https://travis-ci.org/laurent22/massren)
Massren is a command line tool that can be used to rename multiple files using your own text editor. Multiple-rename tools are usually difficult to use from the command line since any regular expression needs to be escaped, and each tool uses its own syntax and flavor of regex. The advantage of massren is that you are using the text editor you use every day, and so can use all its features.
The tool works by creating a file that contains the filenames of the target directory, and opening this file in the text editor. You can then modify the filenames there directly. Once done, save the text file and the files will be renamed. Lines that are not changed will simply be ignored.
![Massren usage animation](https://raw.github.com/laurent22/massren/animation/animation.gif "Massren usage animation")
- Rename multiple files using your own text editor. It should work with any text editor, including vim, emacs, Sublime Text or notepad.
- Undo - any rename operation can be undone.
- Dry run mode - test the results of a rename operation without actually renaming any file.
- Cross-platform - Windows, OSX and Linux are supported.
- Safety checks - since this is a multiple rename tool, various checks are in place to ensure that nothing gets accidentally renamed. For example, the program will check that the files are not being changed by something else while the list of filenames is being edited. If the number of files before and after saving the file is different, the operation will also be cancelled.
The latest executables for each platform are available from the [release page](https://github.com/laurent22/massren/releases). An installation script is also available:
brew tap laurent22/massren
brew install massren
#### With the install script
curl -O https://raw.github.com/laurent22/massren/master/install/install.osx.sh
sudo bash install.osx.sh
If the installation fails, please follow the [instructions below](#building-from-source).
curl -O https://raw.github.com/laurent22/massren/master/install/install.linux-amd64.sh
sudo bash install.linux-amd64.sh
The executable can be downloaded from https://github.com/laurent22/massren/releases
## Usage and examples
massren [OPTIONS] [path]
-n, --dry-run Don't rename anything but show the operation that would have been performed.
-v, --verbose Enable verbose output.
-c, --config Set a configuration value. eg. massren --config <name> [value]
-u, --undo Undo a rename operation. eg. massren --undo [path]
-V, --version Displays version information.
-h, --help Show this help message
Process all the files in the current directory:
Process all the JPEGs in the specified directory:
% massren /path/to/photos/*.jpg
Undo the changes done by the previous operation:
% massren --undo /path/to/photos/*.jpg
Set VIM as the default text editor:
% massren --config editor vim
- Detect default text editor on Windows.
- Disambiguate filenames when processing two or more folders that contain the same filenames.
- Ability to delete files - see https://github.com/laurent22/massren/issues/11
## Building from source
- Go 1.2+ is required
go get github.com/laurent22/massren
- If it doesn't build on OSX, try with:
go get -x -ldflags -linkmode=external github.com/laurent22/massren
More info in [this issue](https://github.com/laurent22/massren/issues/7).