290aae80e1
The parser here is a LL(2) parser, which is handwritten (to avoid complicating the build process and to maintain good control over error reporting, thread safety, etc). Later it's worth exploring using parser generators (lemon, etc) or other tools to simplify things. This commit enables the new parser for syntax highlighting, completions, and abbreviations. Syntax highlighting retains the old implementation (disabled), which will be removed shortly. There is also support for a new execution model, based on the new parser, but it is disabled by default (can be enabled by setting the fish_new_parser variable to 1). There's also lots of new tests, and some machinery for selecting which tests to run. After living on this commit for a while, we'll enable the new execution model by default, and then begin to tear down the machinery of the old one (the block types, builtin_end, the parser_t junk, etc.). After that we can pursue even more exotic execution models, like multithreaded ones. (The branch name is really a misnomer - the tree here is a parse tree, or concrete syntax tree, not an abstract one.) Fixes #557
fish - the friendly interactive shell
fish is a smart and user-friendly command line shell for OS X, Linux, and the rest of the family. fish includes features like syntax highlighting, autosuggest-as-you-type, and fancy tab completions that just work, with no configuration required.
For more on fish's design philosophy, see the design document.
Quick Start
fish generally works like other shells, like bash or zsh. A few important differences can be found at http://fishshell.com/tutorial.html by searching for magic phrase 'unlike other shells'.
Detailed user documentation is available by running help within fish, and also at http://fishshell.com/docs/2.0/index.html
Building
fish is written in a sane subset of C++98, with a few components from C++TR1. It builds successfully with g++ 4.2 or later, and with clang. It also will build as C++11.
fish can be built using autotools or Xcode. autoconf 2.60 or later is required.
fish requires gettext for translation support.
Autotools Build
autoconf
./configure
make [gmake on BSD]
sudo make install
Xcode Development Build
- Build the
basetarget in Xcode - Run the fish executable, for example, in
DerivedData/fish/Build/Products/Debug/base/bin/fish
Xcode Build and Install
xcodebuild install
sudo ditto /tmp/fish.dst /
Help, it didn't build!
If fish reports that it could not find curses, try installing a curses development package and build again.
On Debian or Ubuntu you want:
sudo apt-get install libncurses5-dev
on RedHat, CentOS, or Amazon EC2:
sudo yum install ncurses-devel
Packages for Linux
Instructions on how to find builds for several Linux distros are at https://github.com/fish-shell/fish-shell/wiki/Nightly-builds
Switching to fish
If you wish to use fish as your default shell, use the following command:
chsh -s /usr/local/bin/fish
chsh will prompt you for your password, and change your default shell.
To switch your default shell back, you can run:
chsh -s /bin/bash
Substitute /bin/bash with /bin/tcsh or /bin/zsh as appropriate.
Optional Dependencies
In order to generate completions from man pages compressed with either lzma or xz, you may need to install an extra Python package.
Python versions prior to 2.6 are not supported. For Python versions 2.6 to 3.2 you need to install the module backports.lzma. How to install it depends on your system and how you installed Python. Most Linux distributions should include it as a package named backports-lzma (or similar). From version 3.3 onwards, Python already includes the required module.
Contact Us
Questions, comments, rants and raves can be posted to the official fish mailing list at https://lists.sourceforge.net/lists/listinfo/fish-users or join us on our IRC channel #fish at irc.oftc.net.
Found a bug? Have an awesome idea? Please open an issue on this github page.