hledger/DEVELOPMENT.md

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---
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title: hledger developers' guide
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---
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# Developers' guide
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A rough guide for hledger contributors of all kinds, plus some quick links for everyone.
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<a name="support" />
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## Quick links
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- User and developer support: [how to get help](#how-to-get-help)
- IRC channel: [irc://irc.freenode.net/#ledger](irc://irc.freenode.net/#ledger)
- Mail list: [http://list.hledger.org](http://list.hledger.org)
- Bug tracker: [http://bugs.hledger.org](http://bugs.hledger.org)
- [Release notes](NEWS.html)
- Code:
[get it](#how-to-set-up-for-hledger-development),
[browse it](http://joyful.com/darcsweb/darcsweb.cgi?r=hledger),
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[latest api docs](http://hledger.org/api-doc),
[latest internal code docs](http://hledger.org/code-doc) for all packages
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- Packages:
[hledger](http://hackage.haskell.org/package/hledger),
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[hledger-lib](http://hackage.haskell.org/package/hledger-lib),
[hledger-chart](http://hackage.haskell.org/package/hledger-chart),
[hledger-vty](http://hackage.haskell.org/package/hledger-vty),
[hledger-web](http://hackage.haskell.org/package/hledger-web)
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- Developer reports:
[unit test coverage](http://hledger.org/profs/coverage/hpc_index_fun.html),
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[benchmark](http://hledger.org/profs/latest.bench),
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[profile](http://hledger.org/profs/latest.prof),
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[heap](http://hledger.org/profs/latest.ps)
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- [Developer notes](http://joyful.com/darcsweb/darcsweb.cgi?r=hledger;a=plainblob;f=/NOTES)
<!-- [hledger dependencies](http://packdeps.haskellers.com/feed/?needle=hledger), -->
<!-- [hledger-lib dependencies](http://packdeps.haskellers.com/feed/?needle=hledger-lib), -->
<!-- [hledger-chart dependencies](http://packdeps.haskellers.com/feed/?needle=hledger-chart), -->
<!-- [hledger-vty dependencies](http://packdeps.haskellers.com/feed/?needle=hledger-vty), -->
<!-- [hledger-web dependencies](http://packdeps.haskellers.com/feed/?needle=hledger-web) -->
<script type="text/javascript" src="http://haskell.org/hoogle/datadir/resources/jquery-1.4.2.js"></script>
<script type="text/javascript" src="http://haskell.org/hoogle/datadir/resources/hoogle.js"></script>
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<form action="http://haskell.org/hoogle/" method="get">
<input type="text" name="hoogle" id="hoogle" accesskey="1" size="80" />
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<input type="hidden" name="prefix" value="+hledger +hledger-lib" />
<input type="submit" value="Search hledger, hledger-lib API" />
</form>
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## How to..
### how to get help
- <form action="http://groups.google.com/group/hledger/boxsubscribe" >
join and use the [hledger mail list](http://list.hledger.org). Your email:
<input type=text name=email><input type=submit name="sub" value="Subscribe">
</form>
- chat Simon (sm) on the
[\#ledger](irc://irc.freenode.net/#ledger) irc channel which we
share, or [send email](mailto:simon@joyful.com?subject=hledger:)
- for issues relevant to the wider *ledger community, you can also use or cc ledger's mail list
### how to report problems
- check for related issues at [bugs.hledger.org](http://bugs.hledger.org) ([view all](http://bugs.hledger.org/grid)) or in the [list archive](http://groups.google.com/group/hledger/topics)
- discuss/confirm the issue on irc or list
- [report](http://code.google.com/p/hledger/issues/entry) new issues in the bug tracker
<!-- - test and share problem journal snippets at paste . hledger.org -->
### how to help with testing
- review and test our documentation and web presence
- download and test the binaries on your platform
- test installing via cabal
- use the tools and test functionality, usability, browser compatibility, ui layout etc.
- check that `hledger test` reports no failures
- [run the developer tests](#how-to-run-the-tests)
- discuss/report problems via irc/mail list/bug tracker
### how to help with bug tracking
- get to know the bug tracker and its contents
- join its google project for more access
- research and update issues
### how to set up for hledger development
- install [darcs](http://darcs.net) if you don't have it (version 2)
- get the hledger repo:
darcs get --lazy http://joyful.com/repos/hledger
cd hledger
- install packages required to build hledger and add-ons, or as many of them as possible:
cabal update
make install
This will also try to cabal install the development version of the
hledger packages, so ghc-pkg unregister those afterwards if you don't
want that.
- test patch sending. Make a dummy change:
echo >>README.markdown; darcs record README.markdown -a -m 'my test patch'
send it to yourself:
darcs send --to me@my.address
and make sure you receive it. If not, your system may not be
configured to send email from the command line. Try to fix that. As a
last resort, you can `darcs send -O` and mail the resulting patch file
to the list. Finally, clean up:
darcs obliterate -p 'my test patch'
### how to get your patch committed
- [send it](#how-to-set-up-for-hledger-development)
- you should receive a reply shortly. If in doubt, [follow up](#how-to-get-help) at any time.
- respond to any code review feedback, submitting new patches if needed, until you receive a "patch applied" acknowledgement
- to verify the patch is in the main repo: listen for it on irc or look for it in darcsweb
### how to improve the documentation
- get familiar with the website and documentation online, review and test
- get familiar with the site/doc source files (see Makefile)
- set up for hledger development
- send patches with names prefixed with "doc: " (or "site: ")
### how to run the tests
- set up for hledger development
- cabal install shelltestrunner
- make test
### how to add a test
- identify what to test
- choose the test type: unit ? functional ? benchmark ?
- currently expected to pass or fail ?
- figure out where it goes
- write test, verify expected result
- get it committed
### how to fix a bug or add a feature
- research, discuss, validate the issue/feature on irc/list/bug tracker
- look for related tests, run the tests and check they are passing
- add a test ?
- develop a patch
- include any related issue numbers in the patch name, eg: "fix for blah blah (#NNN)"
- get it committed
### how to become a contributor
- after getting one or more patches committed, read and sign the [contributor list & agreement](CONTRIBUTORS.html)
- or, [ask](#how-to-get-help) to be added
### how to do code review
- watch for and read new patches on the mail list, irc, darcsweb patch feed, or [darcsweb patch log](http://joyful.com/darcsweb/darcsweb.cgi?r=hledger;a=shortlog)
- set up for development and test new patches in your own repo
- read the existing [code docs and source](#quick-links)
- send feedback or discuss via irc or list
### how to help with packaging
- package hledger for linux distros, macports, etc.
- develop mac/windows installers
- find and assist distro packagers/installer developers
### how to help with project management
- clarify/update goals and principles
- monitor, report on project progress and performance
- research, compare and report on successful projects, related projects
- identify collaboration opportunities
- marketing, communication, outreach
- release management, roadmap planning
## Project notes
This will grow into an overall description/blueprint for the hledger project.
### mission, principles, goals
The hledger project aims to produce:
- a practical, accessible, dependable tool for end users
- a useful library and toolbox for finance-minded haskell programmers
- a successful, time-and-money-solvent project within a thriving ecosystem of financial software projects.
### roles and activities
- newcomer/potential user
- user
- library user
- field tester
- bug wrangler
- support
- documentor
- qa
- developer
- packager
- communicator
- project manager
### documentation
- website
- user manual
- developer guide
- code documentation: haddock
- various developer reports
- developer notes outline
- blurbs: in cabal files, module headers, google project, repo message of the day..
### quality assurance
- unit tests (HUnit, make unittest)
- functional tests (shelltestrunner, make functest)
- performance tests (simplebench, make bench)
- documentation tests (make haddocktest + manual)
- ui tests (manual)
- installation tests (manual)
### code
- main darcs repo is http://joyful.com/repos/hledger, browse with [darcsweb](http://joyful.com/darcsweb/darcsweb.cgi?r=hledger)
<a href="http://joyful.com/darcsweb/darcsweb.cgi?r=hledger"><img src=http://joyful.com/repos/hledger/commits.png border=0></a>
<!-- ### release process -->
<!-- ### roadmap -->
<!-- ### communication and collaboration -->
<!-- ### web presence and hosting setup -->
<!-- ### finances and other resources -->
<!-- ### licensing and legal issues -->
<!-- ### contributors and credits -->
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## Related projects
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- John Wiegley's [ledger](http://wiki.github.com/jwiegley/ledger) inspired hledger.
- [beancount](https://furius.ca/beancount/) is another ledger clone, in python
- h/ledger inspired Uwe Hollerbach's [umm](http://www.korgwal.com/umm/)
- Tim Docker's [ledger-reports](http://dockerz.net/repos/ledger-reports) builds on hledger to generate
[html reports](http://dockerz.net/software/hledger_report_sample/report.html)
- I have a few older bits and pieces [here](http://joyful.com/Ledger)
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