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Pycrastinate: TODO less, DO more
4
HOWTO
Use Cases
Concepts
Details
Error types
Clone it, run it
Comments on file parser policies
Try it out, tune it and master it!
Take control
over creeping FIXMEs
Pycrastiwhat!?
1) Search code for FIXMEs*
2) Filter >90 and <15 days old
3) Email report to assess severity
Add exclude and send_email modules
Avoid bad practices
breaking Continuous Integration builds
1) Search public API for kwargs*
2) Filter >180 days old
3) Raise `AssertionError`
Add raise_if_present and filter_by_age modules
Code cleanup
remove TODOs from an old stable codebase
1) Search for TODOs, XXXs, HACKs...
2) Filter out those <6 months old*
3) Email reports to committers
with "1-click-distance" links
New pipeline: gather_git_blames_shell,
aggregate_by, and send_aggregated_email modules
Find, act and analyse TODOs & co.
Pipeline
: "chain of processing elements arranged so that the output of each element is the input of the next" - en.wikipedia.org
Find & Extract
file paths
1. Gather files
2. Inspect files
line meta.
4. Filter
3. Extract more metadata
+ addition.
line meta.
Act & Analyse
(subset)
Avoid bad practices
line metadata
5. Trigger actions
6. Aggregate
report
7. Create report
8. Deliver/notify/etc.
config.py
pycrastinate.py
*. Process results
Why I hunt TODOs
Code cleanup
Definition
WTF is a "TODO"?
Analogy: What's a python function?
Modern C++: What You Need to Know - April 3, 2014 - Herb Sutter
source: http://channel9.msdn.com/Events/Build/2014/2-661
(at 10:48)
Why use pycrastinate?
a summary of key arguments
Pycrastinate
TODO less, DO more
by
Isaac Bernat
May 20 - 2014
github.com/isaacbernat
TODO: ask for questions
Bonus slides
Modules
Enclose
gather_git_blames_shell
"one-liner"
Pycrastinate
by
Isaac Bernat
TODO less, DO more
May 20 - 2014
Modules ordered by priority
Initial results
failure to reject a false H0
(false -)
- Type II
- Convenience
Use it out of the box. No weird formats.
- Speed
(django)
<3.5 sec. >240k lines, >1.7k .py, >60 hits
found 2 TODOs from 2006 (!)
Modules called
through enclose
- No setups
The only dependency is python 2.7/3.3+
(false +)
incorrect rejection of a true H0
- Type I
- Modularity
Easily extensible to meet your needs.
(H0)
- Null hypothesis
no relation found
- Chosen policy
alpha >= 0, beta = 0
(like bloom filters)
source: http://en.wikipedia.org/wiki/Type_I_and_type_II_errors
TODOs are jobs that the programmer thinks should be done, but for some reason can’t do at the moment. [...]
Whatever else a TODO might be, it is not an excuse to leave bad code in the system.
source: Robert C. Martin, “Clean Code – A Handbook of Agile Software Craftsmanship”