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Development

dev

Create declarative development environments.

Can be used with direnv to make your shell automatically load the development environment and its required dependencies.

Types:

  • dev (attrsOf (asIn makeSearchPaths)): Optional. Mapping of environment name to searchPaths. Defaults to { }.

Example:

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{
  inputs,
  ...
}: {
  inputs = {
    nixpkgs = fetchNixpkgs {
      rev = "f88fc7a04249cf230377dd11e04bf125d45e9abe";
      sha256 = "1dkwcsgwyi76s1dqbrxll83a232h9ljwn4cps88w9fam68rf8qv3";
    };
  };

  dev = {
    example = {
      # A development environment with `hello` package
      bin = [
        inputs.nixpkgs.hello
      ];
    };
  };
}

1
m . /dev/example

Example usage with direnv:

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$ cat /path/to/some/dir/.envrc

    source "$(m github:fluidattacks/makes@main /dev/example)/template"

# Now every time you enter /path/to/some/dir
# the shell will automatically load the environment
$ cd /path/to/some/dir

    direnv: loading /path/to/some/dir/.envrc
    direnv: export ~PATH

/path/to/some/dir $ hello

    Hello, world!

# If you exit the directory, the development environment is unloaded
/path/to/some/dir $ cd ..

    direnv: unloading

/path/to/some $ hello

    hello: command not found

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$ cat /path/to/some/dir/.envrc

    cd /path/to/my/project
    source "$(m . /dev/example)/template"

# Now every time you enter /path/to/some/dir
# the shell will automatically load the environment
$ cd /path/to/some/dir

    direnv: loading /path/to/some/dir/.envrc
    direnv: export ~PATH

/path/to/some/dir $ hello

    Hello, world!

# If you exit the directory, the development environment is unloaded
/path/to/some/dir $ cd ..

    direnv: unloading

/path/to/some $ hello

    hello: command not found