From Stack 1.9.1, Stack allows any GitHub, GitLab or Bitbucket repository named
stack-templates to provide project templates for Stack. For example, a
template file at username/stack-templates/my-template.hsfiles on GitHub can be
identified as username/my-template when using stack new. For more
information see the output of the stack templates command and its
documentation.
This repository provides the project template new-template, which is the
default template used by stack new. It also provides STACK_HELP.md, which
specifies the output of the stack templates command.
This repository is the default one used by Stack and it provides 24 other
project templates. Information about some of those templates is included in
template-info.yaml and this repository's Wiki.
Those project templates are maintained but this repository is not accepting new templates because of the difficulties in maintaining large numbers of templates centrally.
This repository's Wiki provides a place where the Haskell community can announce the availability of project templates at other locations.
All the templates in this repository use identifiers from the
SPDX License List and all but two specify
BSD-3-Clause.
The SPDX expression syntax was first required by the Cabal
Package Description Format Specification version 2.2 and that version is
specified in template Cabal files. Hpack will also detect that the use of
BSD-3-Clause in a template package.yaml file requires cabal-version: 2.2
in a Cabal file.
Stack, however, also supports versions of GHC that come with versions of the
Cabal library before Cabal-2.2.0.0. If you are using such versions of GHC,
edit the files produced by the template to replace BSD-3-Clause with BSD3
and edit any Cabal files produced by the template to replace
cabal-version: 2.2 with cabal-version: >=1.10.
Each project template is specified in an .hsfiles file, using the syntax of
the Mustache tool.
Each file to be generated by the project template is specified with
START_FILE, like this:
{-# START_FILE {{name}}.cabal #-}
name: {{name}}
version: 0.1.0.0
...
Parameters to the template are written {{foo}}. They are provided by users via
their Stack config.yaml file, like this:
templates:
params:
author-email: [email protected]
author-name: Chris Done
copyright: 2023 Chris Done
github-username: chrisdone
category: DevelopmentWhen the user runs stack new my-project username/your-template and they do not
have the parameters provided in their Stack config.yaml, Stack will warn the
user that such parameters were missing, like this:
Downloading template username/your-template to create project my-project in
directory my-project/ ...
Downloaded <path_to_username/your-template.hsfiles>.
Note: The following parameters were needed by the template but not provided:
author-email, and author-name.
You can provide them in Stack's global YAML configuration file
(<path_to_config.yaml>) like this:
templates:
params:
author-email: value
author-name: value
Or you can pass each one on the command line as parameters like this:
stack new my-project username/your-template -p "author-email:value"
-p "author-name:value"
The output of the template will yield a blank space where your parameter was. If you want to provide default values for your template parameters, use this Mustache syntax:
author: {{author-name}}{{^author-name}}Author name here{{/author-name}}
The repository https://github.com/prikhi/stack-templatizer (unconnected with
this repository) provides Haskell source code to build an application that
will generate an .hsfiles file from the contents of a folder.
The Yesod templates are generated from the yesod-scaffold repo. Please send pull requests for those templates to that repository instead of this one.
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