[CI] Add a check to detect tab in lua files (#3919)

.ci/check.sh

@@ -21,5 +21,12 @@ if [ "${unscaled_size_check}" ] || [ "${unscaled_size_check_geom}" ]; then
     exit 1
 fi
 
+tab_detected=$(grep -P "\\t" --include \*.lua --exclude={dateparser.lua,xml.lua} --recursive {reader,setupkoenv,datastorage}.lua frontend plugins spec || true)
+if [ "${tab_detected}" ]; then
+    echo -e "\\n${ANSI_RED}Error TAB character detected"
+    echo "${tab_detected}"
+    exit 1
+fi
+
 echo -e "\n${ANSI_GREEN}Luacheck results"
 luajit "$(which luacheck)" --no-color -q {reader,setupkoenv,datastorage}.lua frontend plugins spec

frontend/apps/reader/modules/readerdictionary.lua

@@ -80,8 +80,8 @@ end
 -- HTML quality) in a file named as the .ifo with a .lua
 -- extension, containing for example:
 --    return function(html)
---	html = html:gsub("<hr>", "<hr/>")
---	return html
+--        html = html:gsub("<hr>", "<hr/>")
+--        return html
 --    end
 local function getDictionaryFixHtmlFunc(path)
     if lfs.attributes(path, "mode") == "file" then

frontend/device/pocketbook/device.lua

@@ -34,8 +34,8 @@ local KEY_HOME   = 0x1a
 local KEY_BACK   = 0x1b
 local KEY_PREV2  = 0x1c
 local KEY_NEXT2  = 0x1d
-local KEY_COVEROPEN	= 0x02
-local KEY_COVERCLOSE	= 0x03
+local KEY_COVEROPEN = 0x02
+local KEY_COVERCLOSE = 0x03
 -- luacheck: pop
 
 ffi.cdef[[

plugins/newsdownloader.koplugin/feed_config.lua

@@ -1,11 +1,11 @@
 return {
-	-- list your feeds here:
+    -- list your feeds here:
 
     { "http://feeds.reuters.com/Reuters/worldNews?format=xml", limit = 2, download_full_article=true},
 
     { "https://www.pcworld.com/index.rss", limit = 7 , download_full_article=false},
 
-		-- comment out line ("--" at line start) to stop downloading source
+    -- comment out line ("--" at line start) to stop downloading source
     --{ "http://www.football.co.uk/international/rss.xml", limit = 0 , download_full_article=false},
 
 
@@ -14,14 +14,14 @@ return {
 
 
 
-		--HELP:
-		-- use syntax: {"your_url", limit= max_number_of_items_to_be_created, download_full_article=true/false}
+    --HELP:
+    -- use syntax: {"your_url", limit= max_number_of_items_to_be_created, download_full_article=true/false}
 
-		-- set 'limit' to change number of 'news' to be created
+    -- set 'limit' to change number of 'news' to be created
     -- 'limit' equal "0" means no limit.
 
-		-- 'download_full_article=false' - means download full article using feed link (may not always work correctly)
-		-- 'download_full_article=true' - means use only feed description to create feeds (usually only part of the article)
+    -- 'download_full_article=false' - means download full article using feed link (may not always work correctly)
+    -- 'download_full_article=true' - means use only feed description to create feeds (usually only part of the article)
 
 
 }

plugins/statistics.koplugin/main.lua

@@ -877,7 +877,7 @@ function ReaderStatistics:getTodayBookStats()
                      FROM   page_stat
                      WHERE  start_time >= '%s'
                      GROUP  BY id_book, page
-	            )
+                )
     ]]
     local today_pages, today_period = conn:rowexec(string.format(sql_stmt, start_today_time))
     if today_pages == nil then