test-documentation: Validate HTML with vnu.jar.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

package.json

@@ -69,6 +69,7 @@
     "stylelint": "10.0.1",
     "svgo": "1.2.2",
     "swagger-parser": "6.0.5",
+    "vnu-jar": "^19.6.7",
     "webpack-dev-server": "3.5.1"
   },
   "scripts": {

tools/documentation.vnufilter

@@ -0,0 +1,10 @@
+# Real errors that should be fixed.
+
+Bad value “” for attribute “id” on element “div”: Bad id: An ID must not be the empty string\.
+Duplicate ID “[^”]*”\.
+The first occurrence of ID “[^”]*” was here\.
+
+# Warnings that are probably less important.
+
+The “type” attribute is unnecessary for JavaScript resources\.
+Section lacks heading\. Consider using “h2”-“h6” elements to add identifying headings to all sections\.

tools/test-documentation

@@ -41,27 +41,35 @@ rm -rf _build
 # The crawler would take a very long time to finish and TravisCI would fail as a result.
 sphinx-build -j8 -b html -d _build/doctrees -D html_theme_options.collapse_navigation=True . _build/html
 
+err=0
+
+check() {
+    if "$@"; then
+        color_message 92 "Passed!"
+    else
+        color_message 91 "Failed!"
+        err=1
+    fi
+}
+
+color_message 94 "Validating HTML..."
+check java -jar ../node_modules/vnu-jar/build/dist/vnu.jar \
+    --filterfile ../tools/documentation.vnufilter \
+    --skip-non-html \
+    _build/html
+
 if [ -n "$skip_check_links" ]; then
     color_message 94 "Skipped testing links in documentation."
-    exit 0
-fi
-
+else
     cd ../tools/documentation_crawler
-set +e
     if [ -n "$skip_external_links" ]; then
         color_message 94 "Testing only internal links in documentation..."
-    scrapy crawl_with_status documentation_crawler -a skip_external=set "${loglevel[@]}"
+        check scrapy crawl_with_status documentation_crawler -a skip_external=set "${loglevel[@]}"
         # calling crawl directly as parameter needs to be passed
     else
         color_message 94 "Testing links in documentation..."
-    scrapy crawl_with_status documentation_crawler "${loglevel[@]}"
+        check scrapy crawl_with_status documentation_crawler "${loglevel[@]}"
+    fi
 fi
 
-result=$?
-if [ "$result" -ne 0 ]; then
-    color_message 91 "Failed!"
-    exit 1
-else
-    color_message 92 "Passed!"
-    exit 0
-fi
+exit "$err"

version.py

@@ -21,4 +21,4 @@ LATEST_RELEASE_ANNOUNCEMENT = "https://blog.zulip.org/2019/03/01/zulip-2-0-relea
 # Typically, adding a dependency only requires a minor version bump, and
 # removing a dependency requires a major version bump.
 
-PROVISION_VERSION = '35.0'
+PROVISION_VERSION = '35.1'

yarn.lock

@@ -11220,6 +11220,11 @@ vm-browserify@0.0.4:
   dependencies:
     indexof "0.0.1"
 
+vnu-jar@^19.6.7:
+  version "19.6.7"
+  resolved "https://registry.yarnpkg.com/vnu-jar/-/vnu-jar-19.6.7.tgz#b93bf99c11b64b2405d298dae3f511debece7db9"
+  integrity sha512-uBI4pvolFIbhVQuYempGKsV86kNV5bCH1wVsHPbPCuEtAMk4IovdksO2bdPERUiPRGWgHmJ9A9O/N8FydP4JOg==
+
 void-elements@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/void-elements/-/void-elements-2.0.1.tgz#c066afb582bb1cb4128d60ea92392e94d5e9dbec"