Lint Dockerfiles as you type with radolint, a fast drop-in hadolint replacement written in Rust. Same rules, config and ignore pragmas as hadolint, with ShellCheck for RUN instructions.
Installation
Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter.
Lint Dockerfiles as you type with radolint,
a fast drop-in hadolint replacement written in Rust. You get hadolint's rules,
.hadolint.yaml config and # hadolint ignore= pragmas, and ShellCheck
findings for RUN instructions.
Features
Findings as you type (or on save), with links to each rule's documentation.
Quick fixes: Ignore DLxxxx for this instruction adds or extends a
# hadolint ignore= pragma, and Ignore DLxxxx in this file adds a
# hadolint global ignore= pragma.
Parse errors are shown where they happen.
No setup: if radolint is not on your PATH, the extension offers to download
the release binary for your platform from GitHub and checks its SHA-256
checksum first.
Settings
Setting
Default
Meaning
radolint.path
empty
Binary to run. Empty means radolint on PATH, then the downloaded copy. A hadolint binary works too.
radolint.run
onType
onType (debounced) or onSave.
radolint.config
empty
Config file to pass with --config. Empty means hadolint's usual lookup from the workspace folder.
radolint.ignore
[]
Rule codes to ignore, such as DL3008.
radolint.trustedRegistries
[]
Registries allowed in FROM (DL3026).
radolint.extraArgs
[]
Any other hadolint flags, one per item.
Commands: radolint: Lint Open Dockerfiles, radolint: Download radolint
Binary and radolint: Show Output.
Development
npm ci
npm run compile
RADOLINT_BIN=/path/to/radolint npm test # runs the extension in a throwaway VS Code
npm run package # builds radolint-<version>.vsix
