Explicitly fail if there are errors during docs build

docs/build.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 if [ $# -lt 1 ]; then
 	LANGS="ru en"
@@ -8,7 +9,7 @@ fi
 
 for lang in $LANGS; do
 	echo -e "\n\nLANG=$lang. Creating single page source"
-	mkdir $lang'_single_page' 2>/dev/null
+	mkdir $lang'_single_page' 2>/dev/null || true
 	cp -r $lang/images $lang'_single_page'
 	./concatenate.py $lang
 	echo -e "\n\nLANG=$lang. Building multipage..."

docs/concatenate.py

@@ -68,7 +68,7 @@ for path in files_to_concatenate:
             if sharp_pos > -1:
                 return '[' + text + '](' + link[sharp_pos:] + ')'
             else:
-                print('ERROR: Link [' + text + '](' + link + ') in file ' + path + ' has no anchor. Please provide it.')
+                raise RuntimeError('ERROR: Link [' + text + '](' + link + ') in file ' + path + ' has no anchor. Please provide it.')
                 # return '['+text+'](#'+link.replace('/','-')+')'
 
     for l in file:

docs/mkdocs_en.yml

@@ -4,6 +4,7 @@ copyright: ©2016–2018 Yandex LLC
 docs_dir: en
 site_dir: build/docs/en
 use_directory_urls: true
+strict: true
 
 repo_name: 'yandex/ClickHouse'
 repo_url: 'https://github.com/yandex/ClickHouse/'

docs/mkdocs_en_single_page.yml

@@ -4,6 +4,7 @@ copyright: ©2016–2018 Yandex LLC
 docs_dir: en_single_page
 site_dir: build/docs/en/single
 use_directory_urls: false
+strict: true
 
 repo_name: 'yandex/ClickHouse'
 repo_url: 'https://github.com/yandex/ClickHouse/'

docs/mkdocs_ru.yml

@@ -4,6 +4,7 @@ copyright: ©2016–2018 Yandex LLC
 docs_dir: ru
 site_dir: build/docs/ru
 use_directory_urls: true
+strict: true
 
 repo_name: 'yandex/ClickHouse'
 repo_url: 'https://github.com/yandex/ClickHouse/'

docs/mkdocs_ru_single_page.yml

@@ -4,6 +4,7 @@ copyright: ©2016–2018 Yandex LLC
 docs_dir: ru_single_page
 site_dir: build/docs/ru/single
 use_directory_urls: false
+strict: true
 
 repo_name: 'yandex/ClickHouse'
 repo_url: 'https://github.com/yandex/ClickHouse/'