README.md: expand overview

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# Jehanne # Jehanne
Jehanne is a [simple][simplicity] operating system. Jehanne is a [simple][simplicity] operating system.
@ -7,10 +9,72 @@ It is a fork of [Harvey][harvey] (which in turn is a fork of
diverges from the design and conventions of its ancestors whenever diverges from the design and conventions of its ancestors whenever
they are at odds with its goals. they are at odds with its goals.
For this reason project is named after the famous Franch heretic [Joan of Arc][arc]. For this reason the project is named after the famous Franch heretic [Joan of Arc][arc].
## Overview
This is the main repository, used to build the system as a whole:
- [arch](./arch/) contains one folder for each
supported architecture, with specific C headers and binaries
- [sys](./sys) is the system folder
* [include](./sys/include) contains portable C headers
* [lib](./sys/lib) contains data and scripts used by the
running system
* [man](./sys/man) contains manual pages
* [src](./sys/src) contains the sources of the system
- [doc](./doc/) contains useful documentation for Jehanne
development
* [license](./doc/license/) contains detailed info
about Jehanne [licenses][lic]
* [hacking](./doc/hacking/) contains details about how
to build and modify Jehanne
- [hacking](./hacking) contains the utilities used to
develop Jehanne
- [qa](./qa) contains the regression tests
- [mnt](./mnt) contains default mount targets
- [usr](./usr) contains the users' folders
- [pkgs](./pkgs) will contains the installed packages
The running system also includes supplemental folders like `/lib`,
`/bin` and `/dev` that are bound during the boot as required.
## Build
To build Jehanne and play with it, you need to have git, golang, qemu,
gcc, binutils and bison installed.
For example on Debian GNU/Linux you should be able to get going with
sudo aptitude install git golang build-essential bison qemu-system
After the repository clone, you can give a look with
git submodule init # we have a lot of submodules
git submodule update --init --recursive
./hacking/devshell.sh # start a shell with appropriate environment
./hacking/continuous-build.sh # to build everything
./hacking/runOver9P.sh # to start the system in QEMU
./hacking/drawterm.sh # to connect Jehanne with drawterm
## Hacking
Jehanne is a work in progress.
Forks and pull requests are welcome.
In [doc/hacking](./doc/hacking/) you will find all you
need to know about its principles, design and weirdness.
There's a lot of work to do, in every area of the system.
To coordinate our efforts, we use the github issues.
To discuss (and even debate) about the design and development of Jehanne
we use the [JehanneOS mailing list][mailinglist]: please join and present
yourself and your attitudes.
[simplicity]: http://plato.stanford.edu/entries/simplicity/ "What is simplicity?" [simplicity]: http://plato.stanford.edu/entries/simplicity/ "What is simplicity?"
[harvey]: http://harvey-os.org "Harvey OS" [harvey]: http://harvey-os.org "Harvey OS"
[plan9]: https://github.com/brho/plan9 "UC Berkeley release of Plan 9 under the GPLv2" [plan9]: https://github.com/brho/plan9 "UC Berkeley release of Plan 9 under the GPLv2"
[nix]: https://github.com/rminnich/nix-os [nix]: https://github.com/rminnich/nix-os
[arc]: https://en.wikipedia.org/wiki/Joan_of_Arc "Jeanne d'Arc" [arc]: https://en.wikipedia.org/wiki/Joan_of_Arc "Jeanne d'Arc"
[lic]: ./LICENSE.md "A summary of Jehanne licensing"
[mailinglist]: https://groups.google.com/forum/#!forum/jehanneos