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augment the guide for contributing

Browse source 
Include information about how to deal with lint warnings and suppress
`clang-format` reformatting of blocks of code.

Move information only relevant to developers from the README.md to the
CONTRIBUTING.md document.

Closes #2901
This commit is contained in:
Kurtis Rader 2016-04-05 18:49:06 -07:00
parent 200a10e78d
commit 8e8b5a6481
3 changed files with 66 additions and 26 deletions
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62
CONTRIBUTING.md
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@ -12,6 +12,26 @@ Ultimately we want lint free code. However, at the moment a lot of cleanup is re
To make linting the code easy there are two make targets: `lint` and `lint-all`. The latter does just what the name implies. The former will lint any modified but not committed `*.cpp` files. If there is no uncommitted work it will lint the files in the most recent commit.
### Dealing With Lint Warnings
You are strongly encouraged to address a lint warning by refactoring the code, changing variable names, or whatever action is implied by the warning.
### Suppressing Lint Warnings
Once in a while the lint tools emit a false positive warning. For example, cppcheck might suggest a memory leak is present when that is not the case. To suppress that cppcheck warning you should insert a line like the following immediately prior to the line cppcheck warned about:
```
// cppcheck-suppress memleak // addr not really leaked
```
The explanatory portion of the suppression comment is optional. For other types of warnings replace "memleak" with the value inside the parenthesis (e.g., "nullPointerRedundantCheck") from a warning like the following:
```
[src/complete.cpp:1727]: warning (nullPointerRedundantCheck): Either the condition 'cmd_node' is redundant or there is possible null pointer dereference: cmd_node.
```
Suppressing oclint warnings is more complicated to describe so I'll refer you to the [OCLint HowTo](http://docs.oclint.org/en/latest/howto/suppress.html#annotations) on the topic.
## Ensuring Your Changes Conform to the Style Guides
The following sections discuss the specific rules for the style that should be used when writing fish code. To ensure your changes conform to the style rules you simply need to run
@ -28,6 +48,16 @@ If you want to check the style of the entire code base run
make style-all
```
### Suppressing Reformatting of the Code
If you have a good reason for doing so you can tell `clang-format` to not reformat a block of code by enclosing it in comments like this:
```
// clang-format off
code to ignore
// clang-format on
```
## Fish Script Style Guide
Fish scripts such as those in the *share/functions* and *tests* directories should be formatted using the `fish_indent` command.
@ -48,6 +78,38 @@ The first word of global variable names should generally be `fish` for public va
1. Indent with spaces, not tabs and use four spaces per indent.
1. Comments should always use the C++ style; i.e., each line of the comment should begin with a `//` and should be limited to 100 characters. Comments that do not begin a line should be separated from the previous text by two spaces.
## Testing
The source code for fish includes a large collection of tests. If you are making any changes to fish, running these tests is highly recommended to make sure the behaviour remains consistent.
You are also strongly encouraged to add tests when changing the functionality of fish. Especially if you are fixing a bug to help ensure there are no regressions in the future (i.e., we don't reintroduce the bug).
### Local testing
The tests can be run on your local computer on all operating systems.
Running the tests is only supported from the autotools build and not xcodebuild. On OS X, you will need to install autoconf — we suggest using [Homebrew](http://brew.sh/) to install these tools.
autoconf
./configure
make test [gmake on BSD]
### Travis CI Build and Test
The Travis Continuous Integration services can be used to test your changes using multiple configurations. This is the same service that the fish shell project uses to ensure new changes haven't broken anything. Thus it is a really good idea that you leverage Travis CI before making a pull-request to avoid embarrasment at breaking the build.
You will need to [fork the fish-shell repository on GitHub](https://help.github.com/articles/fork-a-repo/). Then setup Travis to test your changes before you make a pull-request:
1. [Sign in to Travis CI](https://travis-ci.org/auth) with your GitHub account, accepting the GitHub access permissions confirmation.
1. Once you're signed in, and your repositories are synchronised, go to your [profile page](https://travis-ci.org/profile) and enable the fish-shell repository.
1. Push your changes to GitHub.
You'll receive an email when the tests are complete telling you whether or not any tests failed.
You'll find the configuration used to control Travis in the `.travis.yml` file.
## Installing the Required Tools
### Installing the Linting Tools

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README.md
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@ -54,32 +54,6 @@ On RedHat, CentOS, or Amazon EC2:
sudo yum install ncurses-devel
## Testing
The source code for fish includes a large collection of tests. If you are making any changes to fish, running these tests is highly recommended to make sure the behaviour remains consistent.
### Local testing
The tests can be run on your local computer on all operating systems.
Running the tests is only supported from the Autotools build. On OS X, you will require an installation of autoconf; we suggest using [Homebrew](http://brew.sh/) to install these tools.
autoconf
./configure
make test [gmake on BSD]
### Travis CI Build and Test
The Travis Continuous Integration services can be used to test your changes across multiple platforms. You will need to [fork the fish-shell repository on GitHub](https://help.github.com/articles/fork-a-repo/), or push a copy of the code to your GitHub account.
1. [Sign in to Travis CI](https://travis-ci.org/auth) with your GitHub account, accepting the GitHub access permissions confirmation.
2. Once you're signed in, and your repositories are synchronised, go to your [profile page](https://travis-ci.org/profile) and enable the fish-shell repository.
3. Push your changes to GitHub.
You'll receive an email when the tests are complete telling you whether or not any tests failed.
You'll find the configuration used to control Travis in the `.travis.yml` file.
## Runtime Dependencies
fish requires a curses implementation, such as ncurses, to run.
@ -116,6 +90,10 @@ To switch your default shell back, you can run:
Substitute /bin/bash with /bin/tcsh or /bin/zsh as appropriate.
## Contributing Changes to the Code
See the [Guide for Developers](CONTRIBUTING.md).
## 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 [gitter.im channel](https://gitter.im/fish-shell/fish-shell) or IRC channel [#fish at irc.oftc.net](https://webchat.oftc.net/?channels=fish). Or use the [fish tag on Stackoverflow](https://stackoverflow.com/questions/tagged/fish).

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