Pylint JSON report to HTML
Project description
pylint-json2html
A pylint JSON report file to HTML: pylint is used to generate a JSON report, and this tool will transform this report into an HTML document:
usage: pylint-json2html [-h] [-o FILENAME] [-e OUTPUT_ENCODING]
[-t FILENAME] [-f FORMAT] [FILENAME]
Transform Pylint JSON report to HTML
positional arguments:
FILENAME Pylint JSON report input file (or stdin)
optional arguments:
-h, --help show this help message and exit
-o FILENAME, --output FILENAME
Pylint HTML report output file (or stdout)
-e ENCODING, --encoding ENCODING
Encoding used to write output file (if not stdout);
default to utf-8
-t FILENAME, --template FILENAME
Jinja2 custom template to generate report
-f FORMAT, --input-format FORMAT
Pylint JSON Report input type (json or jsonextended)
Why?
Since its 1.7 version, Pylint does not provide an HTML output format. The release notes say that:
It was lately a second class citizen in Pylint, being mostly neglected. Since we now have the JSON reporter, it can be used as a basis for building more prettier HTML reports than what Pylint can currently generate. This is part of the effort of removing cruft from Pylint, by removing less used features.
And I agree with that statements. Few people use the HTML reports, and pylint is getting old. Its core features are complex and they require a lot of times and efforts - and I am thankful for that software to exist in the first place!
So here it is: a plugin to fulfill my own needs. I share it as open-source because why not?
Installation
To install this tool, use pip:
(venv) $ pip install pylint-json2html
You can always download the sources from the github repository, and use the
setup.py
file to install
or develop
, but I would not recommend that
unless you plan to contribute to this small project of mine.
Usage
My favorite way of using pylint
and pylint-json2html
is this one:
(venv) $ pylint my_package | pylint-json2html -o pylint.html
Provided that you configure your Pylint config file with:
[REPORTS]
output-format=json
But you can generate first a JSON file, then use pylint-json2html
to read it:
(venv) $ pylint your_package > pylint.json
(venv) $ pylint-json2html -o pylint.html pylint.json
You can also redirect pylint-json2html
's stdout:
(venv) $ pylint-json2html pylint.json > pylint.html
You can specify the output encoding used to write to your file. Note that you can't do that with stdout (you will have to configure your environment's locale if you want to control that):
(venv) $ pylint-json2html -o pylint.html -e utf-8 pylint.json
This is especially usefull when your locale is something like cp1252
or
latin1
, and you want to make sure your output file is properly written as
utf-8 (as it should be when working with Python file).
Extended Report
Actually, I lied about my favorite way, it is this one:
(venv) $ pylint my_package | pylint-json2html -f jsonextended -o pylint.html
With this Pylint configuration:
[MASTER]
load-plugins=pylint_json2html
[REPORTS]
output-format=jsonextended
The pylint_json2html
is a Pylint plugin that adds a new output format:
jsonextended
. By default, the json
format contains only a list of messages,
and this new format contains also metrics, such the number of analysed
statements, or the list of dependencies.
The configuration above can be tested using the command line instead:
(venv) $ pylint --load-plugins=pylint_json2html \
--output-format=jsonextended your_package > pylint.json
Then, you will be able to use the JSON extended report to generate an HTML report:
(venv) $ pylint-json2html -f jsonextended -o pylint.html pylint.json
And voilà!
Custom Template
This plugin uses a Jinja2 template to generate the HTML output, but you may
need your own template. For that purpose, you can use the option
-t/--template
, like this:
(venv) $ pylint-json2html -f jsonextended -t custom.tpl -o pylint.html pylint.json
Report
In your template you have access to a report
object:
report.score
: score given by pylint, available only withjsonextended
formatreport.previous_score
: previous score given by pylint, available only withjsonextended
formatreport.modules
: a list of 2-value tuple:(module, messages)
The module
object:
module.name
: name of the modulemodule.path
: path to the module's file
The messages
value is a list of dict, each with the following keys:
line
column
type
symbol
message-id
obj
message
Metrics
In your template you have access to a metrics
dict with the following keys:
types
, symbols
, modules
, paths
. Each of them contains a dict.
Encoding
The default template contains that header:
<meta charset="utf-8">
So if you want to use a different output encoding, make sure that:
- you can actually encode the characters from pylint's output with that encoding
- and also that you use your own custom template to change that meta tag, otherwise that might not look very good in a browser
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