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# Depguard
Go linter that checks package imports are in a list of acceptable packages. It
supports a white list and black list option and can do prefix or glob matching.
This allows you to allow imports from a whole organization or only
allow specific packages within a repository. It is recommended to use prefix
matching as it is faster than glob matching. The fewer glob matches the better.
> If a pattern is matched by prefix it does not try to match via glob.
## Install
```bash
go get -u github.com/OpenPeeDeeP/depguard
```
## Config
By default, Depguard looks for a file named `.depguard.json` in the current
current working directory. If it is somewhere else, pass in the `-c` flag with
the location of your configuration file.
The following is an example configuration file.
```json
{
"type": "whitelist",
"packages": ["github.com/OpenPeeDeeP/depguard"],
"packageErrorMessages": {
"github.com/OpenPeeDeeP/depguards": "Please use \"github.com/OpenPeeDeeP/depguard\","
},
"inTests": ["github.com/stretchr/testify"],
"includeGoStdLib": true
}
```
- `type` can be either `whitelist` or `blacklist`. This check is case insensitive.
If not specified the default is `blacklist`.
- `packages` is a list of packages for the list type specified.
- `packageErrorMessages` is a mapping from packages to the error message to display
- `inTests` is a list of packages allowed/disallowed only in test files.
- Set `includeGoStdLib` (`includeGoRoot` for backwards compatability) to true if you want to check the list against standard lib.
If not specified the default is false.
## Gometalinter
The binary installation of this linter can be used with
[Gometalinter](github.com/alecthomas/gometalinter).
If you use a configuration file for Gometalinter then the following will need to
be added to your configuration file.
```json
{
"linters": {
"depguard": {
"command": "depguard -c path/to/config.json",
"pattern": "PATH:LINE:COL:MESSAGE",
"installFrom": "github.com/OpenPeeDeeP/depguard",
"isFast": true,
"partitionStrategy": "packages"
}
}
}
```
If you prefer the command line way the following will work for you as well.
```bash
gometalinter --linter='depguard:depguard -c path/to/config.json:PATH:LINE:COL:MESSAGE'
```
## Golangci-lint
This linter was built with
[Golangci-lint](https://github.com/golangci/golangci-lint) in mind. It is compatable
and read their docs to see how to implement all their linters, including this one.
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