CircleCI fixes

* shellcheck 0.4.5 fix `LC_ALL: en_US.UTF8` (can be removed for shellcheck 0.4.6)

* hush updated luacheck on `reader.lua`; we're not assigning any variables but `= nil` is redundant

.ci/check.sh

@@ -9,13 +9,13 @@ echo -e "\n${ANSI_GREEN}shellcheck results"
 
 echo -e "\\n${ANSI_GREEN}Checking for unscaled sizes"
 # stick `|| true` at the end to prevent Travis exit on failed command
-unscaled_size_check=$(grep -nr --include=*.lua --exclude=koptoptions.lua --exclude-dir=base --exclude-dir=install --exclude-dir=keyboardlayouts --exclude-dir=*arm* "\\(padding\\|margin\\|bordersize\\|width\\|height\\|radius\\|linesize\\) = [0-9]\\{1,2\\}" | grep -v '= 0' | grep -v '= [0-9]/[0-9]' | grep -Ev '(default_option_height|default_option_padding)' | grep -v scaleBySize || true)
+unscaled_size_check=$(grep -nr --include=*.lua --exclude=koptoptions.lua --exclude-dir=base --exclude-dir=luajit-rocks --exclude-dir=install --exclude-dir=keyboardlayouts --exclude-dir=*arm* "\\(padding\\|margin\\|bordersize\\|width\\|height\\|radius\\|linesize\\) = [0-9]\\{1,2\\}" | grep -v '= 0' | grep -v '= [0-9]/[0-9]' | grep -Ev '(default_option_height|default_option_padding)' | grep -v scaleBySize || true)
 # Also check Geom objects; for legibility two regular expressions rather than
 # one enormous indecipharable blob.
-unscaled_size_check_geom=$(grep -E -nr --include=*.lua --exclude=gesturerange_spec.lua --exclude-dir=base --exclude-dir=*arm* 'Geom:new{.+ [wh] = [0-9]{1,4}' | grep -Ev '[wh] = 0' | grep -v '= [0-9]/[0-9]' | grep -v scaleBySize || true)
+unscaled_size_check_geom=$(grep -E -nr --include=*.lua --exclude=gesturerange_spec.lua --exclude-dir=base --exclude-dir=luajit-rocks --exclude-dir=*arm* 'Geom:new{.+ [wh] = [0-9]{1,4}' | grep -Ev '[wh] = 0' | grep -v '= [0-9]/[0-9]' | grep -v scaleBySize || true)
 
 if [ "${unscaled_size_check}" ] || [ "${unscaled_size_check_geom}" ]; then
-    echo -e "\\n${ANSI_RED}Warning: it looks like you might be using unscaled sizes.\\nIt is almost always preferable to defer to one of the predefined sizes in ui.elements.commonui in the following files:"
+    echo -e "\\n${ANSI_RED}Warning: it looks like you might be using unscaled sizes.\\nIt is almost always preferable to defer to one of the predefined sizes in ui.size in the following files:"
     echo "${unscaled_size_check}"
     echo "${unscaled_size_check_geom}"
     exit 1

.circleci/config.yml

@@ -5,6 +5,8 @@ jobs:
       - image: houqp/kobase:0.0.5
         environment:
           EMULATE_READER: 1
+          # this is for shellcheck 0.4.5 and lower; can be removed for 0.4.6
+          LC_ALL: en_US.UTF8
     steps:
       - checkout
       - restore_cache:

reader.lua

@@ -153,10 +153,10 @@ if Device.hasColorScreen() and not G_reader_settings:has("color_rendering") then
     })
 end
 
-local exit_code = nil
+local exit_code
 
 if ARGV[argidx] and ARGV[argidx] ~= "" then
-    local file = nil
+    local file
     if lfs.attributes(ARGV[argidx], "mode") == "file" then
         file = ARGV[argidx]
     elseif open_last and last_file then