Adoptable Cookbooks List

Looking for a cookbook to adopt? You can now see a list of cookbooks available for adoption!
List of Adoptable Cookbooks

Supermarket Belongs to the Community

Supermarket belongs to the community. While Chef has the responsibility to keep it running and be stewards of its functionality, what it does and how it works is driven by the community. The chef/supermarket repository will continue to be where development of the Supermarket application takes place. Come be part of shaping the direction of Supermarket by opening issues and pull requests or by joining us on the Chef Mailing List.

Select Badges

Select Supported Platforms

Select Status


checksum_file (4) Versions 1.0.0

Writes the checksum of a source file or directory to a target file, often for implementing idempotence

cookbook 'checksum_file', '= 1.0.0', :supermarket
cookbook 'checksum_file', '= 1.0.0'
knife supermarket install checksum_file
knife supermarket download checksum_file
Quality 83%

Checksum File Cookbook

GitHub Tag
Build status

Maintainer: OIT Systems Engineering (


This cookbook provides a single resource that calculates the checksum of a source file, then writes that checksum and other file data to a target file.
The resource will signal convergence only if the content of the target file changes.

The most common use of the checksum_file resource is to implement idempotence in a more robust fashion than looking at a single file.
One caveat is that this resource takes longer than checking for the creation of a single file, so may be prohibitive for very large directories.
However, the resource typically performs a tar and an md5sum on a target directory, and has been used for source trees of popular open-source projects without significant overhead compared to that of an entire Chef run.
This method is far faster than recursively checking content or even metadata of directory content.



This cookbook requires Chef 14+


Supported Platform Families:

  • Debian
    • Ubuntu, Mint
  • Red Hat Enterprise Linux
    • Amazon, CentOS, Oracle
  • Suse

Platforms validated via Test Kitchen:

  • Ubuntu
  • Debian
  • CentOS
  • Oracle
  • Fedora
  • Amazon
  • Suse


  • This cookbook should support any recent Linux variant.


This cookbook does not constrain its dependencies because it is intended as a utility library.
It should ultimately be used within a wrapper cookbook.


This cookbook provides one resource for saving a checksum.


This resource provides a single action to save a checksum to a file.


One action is provided.

  • :save - Post condition is that the checksum, and possibly the path and metadata of the source file, are written to the target file.


This resource has five attributes.

  • source_path - Required. The local path to the source file (regular file or directory) for which the checksum is to be calculated.
  • target_path - Defaults to the name of the resource if not set explicitly. The local path to which to write the checksum and file information.
  • owner - Defaults to root. The owner of the target file.
  • group - Defaults to root. The group of the target file.
  • mode - Defaults to 0o644. The permissions of the target file.
  • include_path - Defaults to true. Determines if path information is recorded along with the checksum. If true, a change to the source path (moving the source file) will cause the resource to converge and signal subscribers. The source path is canonicalized before recording so relative, absolute, double dots, and multiple slashes do not matter.
  • include_metadata - Defaults to true. For regular files, determines if metadata is recorded along with the checksum. If true, changing owner, group, mode, or touching the source file will cause the resource to converge and signal subscribers. For directories, metadata is always included for the directory itself and its content. Due to a limitation of GNU tar, modification times are only accurate to one second for directory content.
  • checksum_algorithm - Defaults to md5. The algorithm to use. Supported values are md5 and sha1, not case sensitive.


This cookbook provides no recipes.


Custom resources can be used as below.

checksum_file 'Source Checksum' do
  source_path path_to_source_directory
  target_path '/var/chef/cache/source-checksum'

# Make sure the build triggers iff the sources change
file path_to_bin_file do
  action :nothing
  subscribes :delete, 'checksum_file[Source Checksum]', :immediate

bash 'Compile and Install' do
  code 'make && make install'
  cwd path_to_source_directory
  creates path_to_bin_file


See and

Changelog for Checksum File Cookbook


  • Initial release

Collaborator Number Metric

1.0.0 failed this metric

Failure: Cookbook has 0 collaborators. A cookbook must have at least 2 collaborators to pass this metric.

Contributing File Metric

1.0.0 passed this metric

Foodcritic Metric

1.0.0 passed this metric

No Binaries Metric

1.0.0 passed this metric

Testing File Metric

1.0.0 passed this metric

Version Tag Metric

1.0.0 passed this metric