Wladimir J. van der Laan b3dda0af0e
Merge #21123: code style: Add EditorConfig file
7a135d57b2ac17477b25d5046a3bec57eac3ab30 Add EditorConfig file. (Kiminuo)

Pull request description:

  ### Motivation

  Developers are supposed to follow [Coding style](https://github.com/bitcoin/bitcoin/blob/master/doc/developer-notes.md#coding-style-general). However, [from time to time](https://github.com/bitcoin/bitcoin/pull/21075#discussion_r570125634) a PR is created and then its author is asked to change tabs to spaces, for example.

  Introducing an `.editorconfig` file can mitigate these formatting issues.

  ### User story

  A contributor wants to create a new PR. She clones Bitcoin Core repo, opens her editor, the editor loads `.editorconfig` rules and writes her patch with correct formatting rules. Less Coding Style issues is then discovered in the PR review process and thus less CI runs are needed.

  ### What is EditorConfig file?

  https://editorconfig.org provides very well and concise explanation:

  > What is EditorConfig?

  > EditorConfig helps maintain consistent coding styles for multiple developers working on the same project across various editors and IDEs. The EditorConfig project consists of a file format for defining coding styles and a collection of text editor plugins that enable editors to read the file format and adhere to defined styles. EditorConfig files are easily readable and they work nicely with version control systems.

  ### Support

  `.editorconfig` is supported by many IDEs and text editors. Sometimes, the support is out of the box and sometimes a plugin is needed. However, for example, VS Code detects `.editorconfig` presence and automatically offers you to install the missing plugin.

  See https://editorconfig.org/#pre-installed for details on support. To name a few:

  * Visual Studio (out of the box)
  * VS Code (plugin)
  * JetBrains IDEs (IntelliJ IDEA, PyCharm, etc.) (out of the box)
  * Sublime Text (plugin)
  * Emacs (plugin)
  * Vim (plugin)

  Not supported (AFAIK):

  * [mcedit](https://github.com/MidnightCommander/mc)

  ### My editor does not support `.editorconfig`

  Then nothing really changes for you.

  ### `.editorconfig` vs `.clang-format`

  As explained [here](https://devblogs.microsoft.com/cppblog/clangformat-support-in-visual-studio-2017-15-7-preview-1/):

  > Note that Visual Studio also supports EditorConfig, which works in a similar way. ClangFormat, however, has a [much larger variety of style options](https://clang.llvm.org/docs/ClangFormatStyleOptions.html) than EditorConfig, including some very C++ specific rules that can be set, and it is already used by C++ developers today.

  Having both `.editorconfig` and `.clang-format` in a project, may not always work correctly though, I think. As some editors may have a plugin for `.editorconfig` and a plugin for `clang-formatter` which may not work correctly in unison. In VS Code & Visual Studio EditorConfig [takes precedence over other settings](https://github.com/MicrosoftDocs/visualstudio-docs/blob/master/docs/ide/cpp-editorconfig-properties.md#c-editorconfig-formatting-conventions).

  ### Possible issues

  Your editor may change formatting for some 3rd party library if you edit the code. A solution for this would be to make EditorConfig rules more specific (include only certain paths). I'm not sure if it is an issue in practice.

  ### Testing

  Add some trailing whitespace to a Python file and save the file. You should see that the trailing whitespace is removed.

  ### Possible future work

  It would be great to define rules for Makefiles. This would be good start:

  ```
  # Makefiles
  [Makefile,*.am]
  indent_style = tab
  trim_trailing_whitespace = true
  ```

  I don't know makefiles in this project good enough to propose something reasonable. If this PR is well received, it would be great to add it in this PR.

  Also, there are actually many different file extensions and so the proposed `.editorconfig` file can be probably improved very much:

  ```powershell
  Get-ChildItem -Recurse | % {$_.Extension.ToLower()} | sort | unique
  ```

  <details><summary>Click to see the output</summary>

  ```
  .1
  .ac
  .adoc
  .am
  .bash-completion
  .bat
  .bmp
  .c
  .cc
  .cert
  .cfg
  .clang_complete
  .clang-format
  .cmake
  .cmd
  .cnf
  .com
  .conf
  .cpp
  .css
  .csv
  .doxyfile
  .dtd
  .empty
  .exe
  .exp
  .gci
  .gitattributes
  .github
  .gitignore
  .gitmodules
  .guess
  .h
  .hex
  .hpp
  .html
  .icns
  .ico
  .idb
  .ilk
  .in
  .include
  .ini
  .init
  .ipp
  .jam
  .js
  .json
  .lastbuildstate
  .lib
  .list
  .log
  .m
  .m4
  .md
  .mk
  .mm
  .moc
  .obj
  .openrc
  .openrcconf
  .patch
  .pc
  .pdb
  .pl
  .plist
  .png
  .po
  .pro
  .py
  .python-version
  .qbk
  .qm
  .qml
  .qrc
  .raw
  .rb
  .rc
  .recipe
  .res
  .s
  .sage
  .sass
  .scm
  .scss
  .service
  .sgml
  .sh
  .sln
  .spec
  .sub
  .supp
  .svg
  .targets
  .td
  .tlog
  .ts
  .tx
  .txt
  .ui
  .user
  .v2
  .vcxproj
  .verbatim
  .vscode
  .xml
  .xpm
  .xsl
  .y
  .yapf
  .yml
  .yy
  ```

  </details>

  Fixes #21092

ACKs for top commit:
  laanwj:
    Tested re-ACK 7a135d57b2ac17477b25d5046a3bec57eac3ab30
  MarcoFalke:
    Approach ACK 7a135d57b2ac17477b25d5046a3bec57eac3ab30

Tree-SHA512: c36a3424ecc751fbdd66101463b0c470f5c7adcdb4795b1cd267ff718eb345a04615fc1182338adf5b7db724469dca00c64815a9ef77064734a6536fba41a2ba
2021-02-10 14:30:58 +01:00
2020-10-01 22:19:11 +02:00
2021-01-21 23:09:17 +02:00
2021-01-08 11:40:01 -05:00
2021-02-10 08:00:06 +01:00
2021-01-12 12:53:45 +01:00
2020-12-30 16:24:47 +01:00
2021-01-26 12:50:43 +01:00
2020-11-30 13:53:50 -05:00

Bitcoin Core integration/staging tree

https://bitcoincore.org

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information, as well as an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/, or read the original whitepaper.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but it is not guaranteed to be completely stable. Tags are created regularly from release branches to indicate new official, stable release versions of Bitcoin Core.

The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The CI (Continuous Integration) systems make sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.

Translators should also subscribe to the mailing list.

Description
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