How to format only changed lines by mix format? How to integrate it with git?
This is not an option. Mix format wants to format the entire file passed to it. I also don’t think it ever will be added as the whole point is to add consistency.
They do offer nice options for integrating with git.
You will need to write a CI script that manually invokes mix format with the files in your git dif.
The formatter will read a `.formatter.exs` in the current directory for
formatter configuration. Evaluating this file should return a keyword list.
Here is an example `.formatter.exs` that works as a starting point:
[
inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
]
Besides the options listed in `Code.format_string!/2`, the `.formatter.exs`
supports the following options:
* `:inputs` (a list of paths and patterns) - specifies the default inputs
to be used by this task. For example, `["mix.exs", "{config,lib,test}/**/*.{ex,exs}"]`.
Patterns are expanded with `Path.wildcard/2`.
* `:subdirectories` (a list of paths and patterns) - specifies subdirectories
that have their own formatting rules. Each subdirectory should have a
`.formatter.exs` that configures how entries in that subdirectory should be
formatted as. Configuration between `.formatter.exs` are not shared nor
and
{value, binding}
end
@doc ~S"""
Formats the given code `string`.
The formatter receives a string representing Elixir code and
returns iodata representing the formatted code according to
pre-defined rules.
## Options
* `:file` - the file which contains the string, used for error
reporting
* `:line` - the line the string starts, used for error reporting
* `:line_length` - the line length to aim for when formatting
the document. Defaults to 98.
* `:locals_without_parens` - a keyword list of name and arity
The only real options right now are line_length and locals_without_parens
1 Like
