Add doc8 style checks to Travis-CI

.travis.yml

@@ -3,12 +3,14 @@ language: python
 python:
 - '3.6'
 install:
-- pip install Sphinx sphinx_rtd_theme
+- pip install Sphinx sphinx_rtd_theme doc8
 before_install:
 - chmod +x ./docs/scripts/sphinx_build_link_check.sh
+- chmod +x ./docs/scripts/doc8_style_check.sh
 script:
 - cd docs
 - "./scripts/sphinx_build_link_check.sh"
+- "./scripts/doc8_style_check.sh"
 notifications:
   slack:
     secure: 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

docs/scripts/doc8_style_check.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+# halt script on error
+set -e
+# Check for Style Code Violations
+# (Here D000 is ignored to bypass the include statement errors as the files we are including are
+# not in the same source folder as the include statement.)
+# [ToDo 1. Expand Scan to All Docs (source/) 2. Fix this D000 workaround if possible]
+# Doc Contribution Guide is at scancode-toolkit/contribute/contrib_doc.rst
+doc8 --max-line-length 100 source/ --ignore D000 --quiet

docs/source/doc_maintenance.rst

@@ -101,3 +101,9 @@ examples::
 
 The AboutCode webhook with ReadTheDocs should rebuild the documentation. You can review your
 results online.
+
+Documentation Style Guides
+--------------------------
+
+The ``scancode-toolkit`` documentation is compliant to our doc style standards, enforced using
+``doc8``. For more details refer :ref:`contrib_doc_dev`.

docs/source/scancode-toolkit/contribute/contrib_doc.rst

@@ -22,7 +22,7 @@ How To Run Style Tests
 
 In the project root, run the following command::
 
-    $ doc8 --max-line-length 100 docs/source/scancode-toolkit
+    $ doc8 --max-line-length 100 docs/source/scancode-toolkit --ignore D000
 
 .. note::