Docker image for gofmt

All #awesome-ci Docker images

ansible-lint • ansible • awesome-ci • bandit • black • checkmake • eslint • file-lint • gofmt • goimports • golint • jsonlint • kubeval • linkcheck • mypy • php-cs-fixer • phpcbf • phpcs • phplint • pycodestyle • pydocstyle • pylint • terraform-docs • terragrunt-fmt • terragrunt • yamlfmt • yamllint

View Dockerfiles on GitHub.

Available Architectures: amd64, i386, arm64, arm/v7

Tiny Alpine-based multistage-build dockerized version of gofmt^[1], which adds the additional --ci argument^[2] via a shell wrapper to ensure to exit > 0 if file diffs occur. The image is built nightly against multiple stable versions and pushed to Dockerhub.

• ^{[1] Official project: https://godoc.org/cmd/gofmt}
• ^{[2] See Usage for help}

🐳 Available Docker image versions

Rolling releaess

The following Docker image tags are rolling releases and are built and updated every night.

Docker Tag	Git Ref	gofmt	Available Architectures
latest	master	latest	amd64, i386, arm64, arm/v7

Point in time releases

The following Docker image tags are built once and can be used for reproducible builds. Its version never changes so you will have to update tags in your pipelines from time to time in order to stay up-to-date.

Docker Tag	Git Ref	gofmt	Available Architectures
latest-<tag>	tag: <tag>	latest	amd64, i386, arm64, arm/v7

Where <tag> refers to the chosen git tag from this repository.

📂 Docker mounts

The working directory inside the Docker container is /data/ and should be mounted locally to the root of your project.

💻 Usage

General

$ docker run --rm cytopia/gofmt --help

Usage: cytopia/gofmt [flags] [path...]
       cytopia/gofmt [--ci] [-r rule] [-se] [path...]
       cytopia/gofmt --help

Dockerized version of gofmt with an addition to fail (exit 1) in case of file changes.

Additional wrapper features:
----------------------------
--ci      This option will print the diff to stdout (similar to '-d') and if a diff
          exists it will fail with exit 1.
          Can only be combined with '-r rule', '-s' and '-e'.
          To be used in continuous integration with explicit failing.

Default gofmt flages:
----------------------------
-d        Do not print reformatted sources to standard output.
          If a file's formatting is different than gofmt's, print diffs
          to standard output.
-e        Print all (including spurious) errors.
-l        Do not print reformatted sources to standard output.
          If a file's formatting is different from gofmt's, print its name
          to standard output.
-r rule   Apply the rewrite rule to the source before reformatting.
-s        Try to simplify code (after applying the rewrite rule, if any).
-w        Do not print reformatted sources to standard output.
          If a file's formatting is different from gofmt's, overwrite it
          with gofmt's version. If an error occurred during overwriting,
          the original file is restored from an automatic backup.

Default gofmt usage

# Print diff to stdout and exit 0
$ docker run --rm -v $(pwd):/data cytopia/gofmt -d .

CI wrapper usage

# Print diff to stdout and exit > 0 if diff occurs
$ docker run --rm -v $(pwd):/data cytopia/gofmt --ci .

🔄 Related #awesome-ci projects

Docker images

Save yourself from installing lot's of dependencies and pick a dockerized version of your favourite linter below for reproducible local or remote CI tests:

GitHub	DockerHub	Type	Description
awesome-ci		Basic	Tools for git, file and static source code analysis
file-lint		Basic	Baisc source code analysis
linkcheck		Basic	Search for URLs in files and validate their HTTP status code
ansible		Ansible	Multiple versions and flavours of Ansible
ansible-lint		Ansible	Lint Ansible
gofmt		Go	Format Go source code [1]
goimports		Go	Format Go source code [1]
golint		Go	Lint Go code
eslint		Javascript	Lint Javascript code
jsonlint		JSON	Lint JSON files [1]
kubeval		K8s	Lint Kubernetes files
checkmake		Make	Lint Makefiles
phpcbf		PHP	PHP Code Beautifier and Fixer
phpcs		PHP	PHP Code Sniffer
phplint		PHP	PHP Code Linter [1]
php-cs-fixer		PHP	PHP Coding Standards Fixer
bandit		Python	A security linter from PyCQA
black		Python	The uncompromising Python code formatter
mypy		Python	Static source code analysis
pycodestyle		Python	Python style guide checker
pydocstyle		Python	Python docstyle checker
pylint		Python	Python source code, bug and quality checker
terraform-docs		Terraform	Terraform doc generator (TF 0.12 ready) [1]
terragrunt		Terraform	Terragrunt and Terraform
terragrunt-fmt		Terraform	terraform fmt for Terragrunt files [1]
yamlfmt		Yaml	Format Yaml files [1]
yamllint		Yaml	Lint Yaml files

^[1] Uses a shell wrapper to add enhanced functionality not available by original project.

Makefiles

Visit cytopia/makefiles for dependency-less, seamless project integration and minimum required best-practice code linting for CI. The provided Makefiles will only require GNU Make and Docker itself removing the need to install anything else.

📄 License

MIT License

Copyright (c) 2019 cytopia