Install

1. Get a copy of Coq with PGIP support

   git clone https://github.com/ezyang/coq

   build Coq using the standard methods

You need to tell Logitext about where this Coq lives. The easiest way is to create a file named config in the Logitext directory that sets the PATH to the bin directory of the built Coq, e.g.

echo 'export PATH=$HOME/coq/bin:$PATH' > config

(Note: We use the -boot option to run Coq; this makes installation easier but requires you to keep the build directory around. If you really want to 'make install' your copy of Coq, you'll need to edit CoqTop.hs to remove the -boot flag, or make a coqtop wrapper executable that strips the -boot flag.)

Test this setup by running the following commands:

. config
coqtop -v    # should have build date equal to current date
coqtop -boot # should put you into repl

2. Get the Ur metaprogramming library

   hg clone http://hg.impredicative.com/meta/

Place this as a subdirectory of the logitext folder, and it will automatically get picked up.

3. Get the Ur/Web compiler

   hg clone http://hg.impredicative.com/urweb

   build Ur/Web using the standard method

You have a few options for setting up Ur/Web. If you can install it globally on the system, you need no further changes.

Alternatively, you can configure an alternate --prefix for Ur/Web, and then add the Ur/Web in that location to your PATH. (The build.sh script references 'config', so you can place it there.) You'll also need to add the include directory to C_INCLUDE_PATH, as we use the C FFI, which needs a fully qualified header name (GHC will need this too).

Another convenient option is to just set URWEB_FLAGS="-boot", and don't bother installing into an alternate prefix. You'll still need to modify PATH and C_INCLUDE_PATH, but you can directly point them at the build directory.

4. Prepare GHC and Haskell

Any widely available distribution should do; the author personally is using 7.4.1 with the Haskell Platform. Run

cabal configure

in order to find out what libraries you need, and install them. We don't use cabal to build the Haskell products though, because we need to use GHC to link Ur/Web and Haskell code together.

5. Build it!

You'll need a Linux system with inotify to use the normal scripts. Run

./build.sh

which sets up a continuous rebuilding server, and automatically starts up with the normal parameters. Tweak the script for your own needs as necessary. You can also run

./tc.sh

to get continuous typechecking on the Ur/Web files.

6. Serve static files

Ur/Web doesn't support serving static files natively, so you will need to have another running web server to serve the external JavaScript and CSS files. By default they are expected to be at the URL http://localhost/logitext/ but you can change this by editing js.urp, logitext.urp, and logitext.ur (be sure to change the href, the script directives and the allow url directives).

Troubleshooting

Database connection initialized.
Starting up coqtop...
Ready coqtop
fd:9: commitBuffer: resource vanished (Broken pipe)

This means you are not using a version of Coq which understands the -pgip flag.

In file included from /tmp/fileMvYC8r/webapp.c:7:0:
/home/ezyang/Dev/logitext/haskell.h:1:25: fatal error: urweb/urweb.h: No such file or directory

You have not set your C_INCLUDE_PATH correctly.

unhandled exception: Io: openIn "/usr/local/lib/urweb/ur/char.ur" failed with SysErr: No such file or directory [noent]

You forgot to pass the -boot flag to Ur/Web using URWEB_FLAGS.