doit - Automation Tool
doit comes from the idea of bringing the power of build-tools to execute any kind of task.
Build-tools were created with two primary goals:
- To keep track of inter-dependencies between tasks and ensure that they will be executed in the correct order.
- To be faster than manually executing all tasks. Actually it can not really execute a given task faster, instead it has some mechanism to determine if a task is up-to-date or not. So it is faster by executing less tasks, executing only the ones required (not up-to-date).
For more details check the Software Carpentry’s lecture.
Task’s metadata (actions, dependencies, targets…) are better described in a declarative way, but often you want to create this metadata programmatically.
- In doit plain python is used to define task’s metadata allowing easy creation of tasks dynamically.
- In doit it is possible to integrate task’s actions defined by both python code and external programs (shell commands).
- In doit tasks dependencies can be calculated at execution time by another task.
Traditional build-tools were created mainly to deal with compile/link process of source code. doit was designed to solve a broader range of tasks.
- Unlike other build-tools doit allows you to define how/when a task should be considered up-to-date (instead of just checking for changes in files).
doit was designed to be easy to use and “get out of your way”.
doit can be used as
- a build tool (generic and flexible)
- home of your management scripts (it helps you organize and combine shell scripts and python scripts)
- a functional tests runner (combine together different tools)
- a configuration management system
- manage computational pipelines
- Easy to use, “no-API”
- Use python to dynamically create tasks on-the-fly
- Flexible, adapts to many workflows for creation of tasks/rules/recipes
- Support for multi-process parallel execution
- Built-in integration of inotify (automatic re-execution) (linux/mac only)
- Can be distributed as a standalone (single-file) script
- Runs on Python 2.5 through 3.2
This blog post explains how everything started.
What people are saying about doit
Congratulations! Your tool follows the KISS principle very closely. I always wondered why build tools had to be that complicated. - Elena
Let me start by saying I’m really lovin doit, at first the interface seemed verbose but quickly changed my mind when I started using it and realized the flexibility. Many thanks for the great software! - Michael Gliwinski
I love all the traditional unix power tools, like cron, make, perl, …, I also like new comprehensive configuration management tools like CFEngine and Puppet. But I find doit to be so versatile and so productive. - Charlie Guo
I needed a sort of ‘make’ tool to glue things together and after trying out all kinds, doit … has actually turned out to be beautiful. Its easy to add and manage tasks, even complex ones– gluing things together with decorators and ‘library’ functions I’ve written to do certain similar things. - Matthew