diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index 2756ad1ca..9c8b398d8 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -21,4 +21,4 @@ jobs:
     - name: Run ShellCheck
       uses: ludeeus/action-shellcheck@master
       with:
-        ignore: sidebar hooks
+        ignore: sidebar
diff --git a/hooks/commit-msg b/hooks/commit-msg
index cc4bf7316..6efe363eb 100755
--- a/hooks/commit-msg
+++ b/hooks/commit-msg
@@ -47,6 +47,7 @@ function log() {
 
 function run_prepend_commit_msg() {
   GREP_REGEX=""
+  # shellcheck disable=SC2068
   for t in ${VALID_START_REGEX[@]}; do
     GREP_REGEX="$GREP_REGEX|^$t: "
   done
@@ -58,6 +59,7 @@ function run_prepend_commit_msg() {
     log "$COMMIT_MSG_EXIT_CODE" "Commit message prepended"
   else
     COMMIT_MSG_EXIT_CODE="1"
+    # shellcheck disable=SC2068
     for t in ${VALID_START_REGEX[@]}; do
       echo -e "\e[32m$t:\e[39m \e[33m$1\e[39m"
     done
@@ -109,7 +111,7 @@ function run_check_if_merge_commit {
   fi
 }
 
-data="$(sed '/^ *#/d' "$1")"
+data="$(sed '/^ *#/d' "$MSG")"
 
 run_check_if_merge_commit "$data"
 run_prepend_commit_msg "$data"
diff --git a/hooks/pre-commit b/hooks/pre-commit
index bbd890c88..f3e28e359 100755
--- a/hooks/pre-commit
+++ b/hooks/pre-commit
@@ -30,7 +30,7 @@ function log() {
   len="$((${#2} - 1))"
   columns=$(tput cols)
   echo -en "$2 "
-  printf '.%.0s' $(seq $(( $columns - $len - 15)))
+  printf '.%.0s' $(seq $(( columns - len - 15)))
 
   if [[ "$1" == "$WARNING" ]]; then
     _warning="${3:-WARNING}"
@@ -65,6 +65,7 @@ function run_linter_shell() {
 
   SHELL_LINTING_OUT=""
   SHELL_LINTING_EXIT_CODE=""
+  # shellcheck disable=SC2044
   for file in $(find . -type f -name "*.sh" ! -name "rofi-spotlight.sh"); do
     out="$(shellcheck "$file")"
     code="$?"
@@ -105,6 +106,7 @@ function run_license_linter_lua() {
 --SOFTWARE.
 ]]"
   _LICENSE_LUA_OUT=""
+  # shellcheck disable=SC2044
   for file in $(find . -type f -name "*.lua" ! -name "release.lua" -not -path "*lib-lua*"); do
     out="$(head -n24 "$file")"
     if [[ ! "$out" == "$_LICENSE" ]]; then
@@ -147,6 +149,7 @@ function run_license_linter_bash() {
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE."
   _LICENSE_BASH_OUT=""
+  # shellcheck disable=SC2044
   for file in $(find . -type f -name "*.sh"); do
     out="$(head -n24 "$file")"
     if [[ ! "$out" == "$_LICENSE" ]]; then
@@ -163,7 +166,7 @@ function run_license_linter_bash() {
 }
 
 function run_test_suite() {
-  if [[ "$(cat /etc/os-release | grep '^NAME' | cut -d'=' -f2 | tr -d '"')" == "TOS Linux" ]]; then
+  if [[ "$(grep '^NAME' /etc/os-release | cut -d'=' -f2 | tr -d '"')" == "TOS Linux" ]]; then
     UNIT_TEST_OUT="$(bash test-runner.sh 2>/dev/null)"
     UNIT_EXIT_CODE="$?"
   else
diff --git a/hooks/pre-push b/hooks/pre-push
index e474b116d..757cd8946 100755
--- a/hooks/pre-push
+++ b/hooks/pre-push
@@ -29,7 +29,7 @@ function log() {
   len="$((${#2} - 1))"
   columns=$(tput cols)
   echo -en "$2 "
-  printf '.%.0s' $(seq $(($columns - $len - 15)))
+  printf '.%.0s' $(seq $((columns - len - 15)))
 
   if [[ ! "$1" -eq "0" ]]; then
     echo -e " \e[30m\e[41m FAILED  \e[49m\e[39m"
diff --git a/plugins/calendar-bare-widget/init.lua b/plugins/calendar-bare-widget/init.lua
index efa2a67e7..881abd1f0 100644
--- a/plugins/calendar-bare-widget/init.lua
+++ b/plugins/calendar-bare-widget/init.lua
@@ -40,7 +40,7 @@ local cal =
 }
 
 -- generate a text widget that acts like the header
-header =
+local header =
   wibox.widget {
   text = "Calendar",
   font = "SFNS Display Regular 14",
diff --git a/plugins/desktop-widgets/widgets.lua b/plugins/desktop-widgets/widgets.lua
index 40e096073..894a60dc0 100644
--- a/plugins/desktop-widgets/widgets.lua
+++ b/plugins/desktop-widgets/widgets.lua
@@ -34,9 +34,8 @@ local rounded = require("lib-tde.widget.rounded")
 -- title is the text below the progress bar
 -- timeout is an optional value that specifies how often to update the widget default to one second
 -- bar_size is an optional value that specifies how thick the radial bar should be
-local chart = function(x, y, width, height, title, fillFunc, timeout, bar_size)
+local chart = function(x, y, width, height, title, fillFunc, timeout, _)
     timeout = timeout or 1
-    bar_size = bar_size or 8
 
     local margin_ratio = 0.10 -- in percentage
     local bar_ratio = 0.75 -- in percentage
diff --git a/plugins/docker-widget/init.lua b/plugins/docker-widget/init.lua
index b634a3488..380330887 100644
--- a/plugins/docker-widget/init.lua
+++ b/plugins/docker-widget/init.lua
@@ -145,7 +145,7 @@ local status_to_icon_name = {
 }
 
 local function worker(args)
-    local args = args or {}
+    args = args or {}
 
     local icon = args.icon or ICONS_DIR .. "docker.svg"
     local number_of_containers = args.number_of_containers or -1
@@ -225,14 +225,14 @@ local function worker(args)
 
                                 awful.spawn.easy_async(
                                     "docker " .. command .. " " .. container["name"],
-                                    function(stdout, stderr)
-                                        if stderr ~= "" then
-                                            show_warning(stderr)
+                                    function(_, stderr_2)
+                                        if stderr_2 ~= "" then
+                                            show_warning(stderr_2)
                                         end
                                         spawn.easy_async(
                                             string.format(LIST_CONTAINERS_CMD, number_of_containers),
-                                            function(stdout, stderr)
-                                                rebuild_widget(stdout, stderr)
+                                            function(stdout_3, stderr_3)
+                                                rebuild_widget(stdout_3, stderr_3)
                                             end
                                         )
                                     end
@@ -293,14 +293,14 @@ local function worker(args)
 
                                 awful.spawn.easy_async(
                                     "docker " .. command .. " " .. container["name"],
-                                    function(stdout, stderr)
-                                        if stderr ~= "" then
-                                            show_warning(stderr)
+                                    function(_, stderr2)
+                                        if stderr2 ~= "" then
+                                            show_warning(stderr2)
                                         end
                                         spawn.easy_async(
                                             string.format(LIST_CONTAINERS_CMD, number_of_containers),
-                                            function(stdout, stderr)
-                                                rebuild_widget(stdout, stderr)
+                                            function(stdout3, stderr3)
+                                                rebuild_widget(stdout3, stderr3)
                                             end
                                         )
                                     end
diff --git a/plugins/error-widget/init.lua b/plugins/error-widget/init.lua
index 6578a17a7..9072874f0 100644
--- a/plugins/error-widget/init.lua
+++ b/plugins/error-widget/init.lua
@@ -26,7 +26,7 @@
 --local wibox = require("wibox")
 
 -- generate a text widget that acts like the header
-header =
+local header =
     wibox.widget {
     text = "Error",
     font = "SFNS Display Regular 14",
diff --git a/plugins/github-contributions-widget/init.lua b/plugins/github-contributions-widget/init.lua
index 15cf2712a..5e0fe5425 100644
--- a/plugins/github-contributions-widget/init.lua
+++ b/plugins/github-contributions-widget/init.lua
@@ -39,9 +39,6 @@ local dpi = require("beautiful").xresources.apply_dpi
 
 local GET_CONTRIBUTIONS_CMD =
     [[bash -c "curl -s https://github-contributions.now.sh/api/v1/%s | jq -r '[.contributions[] | select ( .date | strptime(\"%%Y-%%m-%%d\") | mktime < now)][:%s]| .[].color'"]]
--- in case github-contributions.now.sh stops working contributions can be scrapped from the github.com with the command below. Note that the order is reversed.
-local GET_CONTRIBUTIONS_CMD_FALLBACK =
-    [[bash -c "curl -s https://github.com/users/%s/contributions | grep -o '\" fill=\"\#[0-9a-fA-F]\{6\}\" da' | grep -o '\#[0-9a-fA-F]\{6\}'"]]
 
 local github_contributions_widget =
     wibox.widget {
@@ -53,7 +50,7 @@ local github_contributions_widget =
 }
 
 local function worker(args)
-    local args = args or {}
+    args = args or {}
 
     local username = args.username or "F0xedb"
     local days = args.days or 60
@@ -77,10 +74,10 @@ local function worker(args)
         local r, g, b = hex2rgb(color)
 
         return wibox.widget {
-            fit = function(self, context, width, height)
+            fit = function(_, _, _, _)
                 return dpi(7), dpi(7)
             end,
-            draw = function(self, context, cr, width, height)
+            draw = function(_, _, cr, _, _)
                 cr:set_source_rgb(r / 255, g / 255, b / 255)
                 cr:rectangle(0, 0, with_border and dpi(5) or dpi(7), with_border and dpi(5) or dpi(7))
                 cr:fill()
@@ -92,11 +89,11 @@ local function worker(args)
     local col = {layout = wibox.layout.fixed.vertical}
     local row = {layout = wibox.layout.fixed.horizontal}
     local a = 5 - os.date("%w")
-    for i = 0, a do
+    for _ = 0, a do
         table.insert(col, get_square("#ebedf0"))
     end
 
-    local update_widget = function(widget, stdout, _, _, _)
+    local update_widget = function(_, stdout, _, _, _)
         for colors in stdout:gmatch("[^\r\n]+") do
             if a % 7 == 0 then
                 table.insert(row, col)
@@ -116,7 +113,7 @@ local function worker(args)
 
     awful.spawn.easy_async(
         string.format(GET_CONTRIBUTIONS_CMD, username, days),
-        function(stdout, stderr)
+        function(stdout, _)
             update_widget(github_contributions_widget, stdout)
         end
     )
diff --git a/plugins/hello-world-widget/init.lua b/plugins/hello-world-widget/init.lua
index 83f700ecc..6da3e00a3 100644
--- a/plugins/hello-world-widget/init.lua
+++ b/plugins/hello-world-widget/init.lua
@@ -33,7 +33,7 @@ local beautiful = require("beautiful")
 local PATH_TO_ICONS = os.getenv("HOME") .. "/.config/tde/hello-world-widget/icons/"
 
 -- generate the icon widget
-hello_icon_widget =
+local hello_icon_widget =
   wibox.widget {
   {
     id = "icon",
@@ -47,7 +47,7 @@ hello_icon_widget =
 }
 
 -- generate a text widget that acts like the header
-hello_header =
+local hello_header =
   wibox.widget {
   text = "Hello, World!",
   font = "SFNS Display Regular 14",
@@ -57,7 +57,7 @@ hello_header =
 }
 
 -- generate a text widget that acts like a subtitle
-hello_subtitle =
+local hello_subtitle =
   wibox.widget {
   text = "Good to see you",
   font = "SFNS Display Regular 16",
diff --git a/plugins/jira-widget/init.lua b/plugins/jira-widget/init.lua
index e07ad0235..677aa3e64 100644
--- a/plugins/jira-widget/init.lua
+++ b/plugins/jira-widget/init.lua
@@ -41,7 +41,6 @@ local naughty = require("naughty")
 local gears = require("gears")
 local beautiful = require("beautiful")
 local gfs = require("gears.filesystem")
-local color = require("gears.color")
 local clickable_container = require("widget.material.clickable-container")
 local dpi = require("beautiful").xresources.apply_dpi
 
@@ -76,23 +75,11 @@ local image =
 
 local button = wibox.container.margin(image, 0, dpi(5), 0, 0)
 
-local urgent_widget = {
-    id = "d",
-    draw = function(self, context, cr, width, height)
-        cr:set_source(color(beautiful.fg_urgent))
-        cr:arc(height / 4, height / 4, height / 4, 0, math.pi * 2)
-        cr:fill()
-    end,
-    visible = false,
-    layout = wibox.widget.base.make_widget
-}
-
 local jira_widget =
     wibox.widget {
     {
         {
             button,
-            urgent,
             id = "b",
             layout = wibox.layout.stack
         },
@@ -108,17 +95,15 @@ local jira_widget =
     set_text = function(self, new_value)
         self.txt.text = new_value
     end,
-    set_icon = function(self, path)
+    set_icon = function(_, path)
         image:set_icon(path)
     end,
     is_everything_ok = function(self, is_ok)
         if is_ok then
-            urgent_widget.visible = false
             image:set_opacity(1)
             image:emit_signal("widget:redraw_needed")
         else
             self.txt:set_text("")
-            urgent_widget.visible = true
             image:set_opacity(0.2)
             image:emit_signal("widget:redraw_needed")
         end
@@ -162,7 +147,7 @@ local tooltip =
     preferred_positions = {"bottom"}
 }
 
-local function createRow(issue, host, path_to_avatar)
+local function createRow(issue, host_in, path_to_avatar)
     local row =
         wibox.widget {
         {
@@ -224,7 +209,7 @@ local function createRow(issue, host, path_to_avatar)
                 {},
                 1,
                 function()
-                    spawn.with_shell("xdg-open " .. host .. "/browse/" .. issue.key)
+                    spawn.with_shell("xdg-open " .. host_in .. "/browse/" .. issue.key)
                     popup.visible = false
                     grabber:stop()
                 end
@@ -234,7 +219,7 @@ local function createRow(issue, host, path_to_avatar)
     return row
 end
 
-local function createRowTable(issues, host)
+local function createRowTable(issues, host_in)
     local rows = {
         {widget = wibox.widget.textbox},
         layout = wibox.layout.fixed.vertical
@@ -255,14 +240,14 @@ local function createRowTable(issues, host)
                 )
             end
         end
-        table.insert(rows, createRow(issue, host, path_to_avatar))
+        table.insert(rows, createRow(issue, host_in, path_to_avatar))
     end
     return rows
 end
 
-local function createTable(result, host, maxelements)
+local function createTable(result_in, host_in, maxelements)
     if maxelements == nil then
-        maxelements = #result.issues
+        maxelements = #result_in.issues
     end
 
     -- the partial variable hold the result set of one vertical table set
@@ -270,11 +255,11 @@ local function createTable(result, host, maxelements)
     local previousTableIndex = 1
     -- arr holds the information about one vertical table set
     local arr = {}
-    for index, issue in ipairs(result.issues) do
+    for index, issue in ipairs(result_in.issues) do
         -- get the index in the table
         local tableIndex = math.ceil(index / maxelements)
         if not (previousTableIndex == tableIndex) then
-            table.insert(arr, createRowTable(partialIssues, host))
+            table.insert(arr, createRowTable(partialIssues, host_in))
             -- reset variable for next vertical set
             partialIssues = {}
             previousTableIndex = tableIndex
@@ -282,7 +267,7 @@ local function createTable(result, host, maxelements)
         table.insert(partialIssues, issue)
         print("Inserting issue: " .. issue.key .. " into " .. tableIndex)
     end
-    table.insert(arr, createRowTable(partialIssues, host))
+    table.insert(arr, createRowTable(partialIssues, host_in))
     local table_widget =
         wibox.widget {
         arr[1],
@@ -301,7 +286,7 @@ local function createTable(result, host, maxelements)
 end
 
 local function worker(args)
-    local args = args or {}
+    args = args or {}
 
     local icon = args.icon or HOME_DIR .. "/.config/tde/jira-widget/jira-mark-gradient-blue.svg"
     host = args.host or show_warning("Jira host is unknown")
diff --git a/plugins/jira-widget/json.lua b/plugins/jira-widget/json.lua
index 9da4108e8..2a7279715 100644
--- a/plugins/jira-widget/json.lua
+++ b/plugins/jira-widget/json.lua
@@ -73,7 +73,7 @@ local function escape_char(c)
   return "\\" .. (escape_char_map[c] or string.format("u%04x", c:byte()))
 end
 
-local function encode_nil(val)
+local function encode_nil(_)
   return "null"
 end
 
@@ -101,7 +101,7 @@ local function encode_table(val, stack)
       error("invalid table: sparse array")
     end
     -- Encode
-    for i, v in ipairs(val) do
+    for _, v in ipairs(val) do
       table.insert(res, encode(v, stack))
     end
     stack[val] = nil
diff --git a/plugins/settings-app-widget/init.lua b/plugins/settings-app-widget/init.lua
index 4fa02eb3a..480563425 100644
--- a/plugins/settings-app-widget/init.lua
+++ b/plugins/settings-app-widget/init.lua
@@ -79,7 +79,7 @@ local function create()
 
   local function decorate_cell(widget, flag, _)
     local props = styles[flag] or {}
-    ret = widget
+    local ret = widget
     if flag == "focus" then
       ret =
         wibox.container.margin(
diff --git a/plugins/snake/init.lua b/plugins/snake/init.lua
index 712367405..1fc0d5be8 100644
--- a/plugins/snake/init.lua
+++ b/plugins/snake/init.lua
@@ -58,8 +58,8 @@ local size = dpi(20)
 -- 10 and 50 have a margin of error of 40
 -- this function returns true when the margin is smaller that <margin>
 local function margin_of_error(point1, point2, margin)
-    local smaller = 0
-    local bigger = 0
+    local smaller
+    local bigger
     if point1 == point2 then
         return true
     end
@@ -81,8 +81,8 @@ end
 
 -- create one "section" of the snake at a specific x and y position
 -- if head and fruit define the color of the box
-local function createPart(x, y, head, fruit)
-    local bg = head or fruit or beautiful.accent.hue_800
+local function createPart(x, y, head, fruit_in)
+    local bg = head or fruit_in or beautiful.accent.hue_800
     local box =
         wibox(
         {
diff --git a/profiler/init.lua b/profiler/init.lua
index d857a8d9d..9d6d3afbb 100644
--- a/profiler/init.lua
+++ b/profiler/init.lua
@@ -26,7 +26,7 @@ local profile_runner = require("profiler.isolation_runner")
 local filehandle = require("lib-tde.file")
 
 local function profile_tde()
-    local res, out = profile_runner.run_rc_config_in_xephyr(os.getenv("PWD") .. "/profiler/runtime.lua")
+    local _, out = profile_runner.run_rc_config_in_xephyr(os.getenv("PWD") .. "/profiler/runtime.lua")
     print(out)
 end
 
@@ -36,7 +36,7 @@ local function profile_file()
         profile.setclock(require("socket").gettime)
     end
     profile.start()
-    rlprnt = print
+    local rlprnt = print
 
     if os.getenv("NO_FD") == "1" then
         print = function(_, _)
diff --git a/profiler/isolation_runner.lua b/profiler/isolation_runner.lua
index 6ae707f99..318f31df0 100644
--- a/profiler/isolation_runner.lua
+++ b/profiler/isolation_runner.lua
@@ -33,7 +33,7 @@ _G.DISPLAY_ID = 100
 -- the boolean tells us if we found IT-test-result:true in the output
 -- this string should tell us if we encountered what we expect from the Integration Test
 -- The last element is the stdout from awesomewm
-function run_rc_config_in_xephyr(config, starttime, endtime, funcs)
+local function run_rc_config_in_xephyr(config, _, _, _)
     local timeout = (tonumber(os.getenv("TOTAL_TIME")) + 1) or 10
 
     if os.getenv("MULTIPLIER") then
diff --git a/profiler/profile.lua b/profiler/profile.lua
index f738d1e8c..b3cb88269 100644
--- a/profiler/profile.lua
+++ b/profiler/profile.lua
@@ -81,10 +81,6 @@ end
 
 --- Starts collecting data.
 function profile.start()
-    if rawget(_G, "jit") then
-        jit.off()
-        jit.flush()
-    end
     debug.sethook(profile.hooker, "cr")
 end
 
@@ -192,7 +188,7 @@ function profile.report(n)
 end
 
 -- store all internal profiler functions
-for k, v in pairs(profile) do
+for _, v in pairs(profile) do
     if type(v) == "function" then
         _internal[v] = true
     end
diff --git a/profiler/runtime.lua b/profiler/runtime.lua
index 87398cacd..b269f18f3 100644
--- a/profiler/runtime.lua
+++ b/profiler/runtime.lua
@@ -26,8 +26,8 @@ local profile = require("profiler.profile")
 local delayed_timer = require("lib-tde.function.delayed-timer")
 local filehandle = require("lib-tde.file")
 
-originalPrint = print
-print = function(str)
+local originalPrint = print
+print = function(_)
 end
 -- start profiling
 if os.getenv("REALTIME") == "1" then
diff --git a/tde/.luacheckrc b/tde/.luacheckrc
index 590a32671..67599ba06 100644
--- a/tde/.luacheckrc
+++ b/tde/.luacheckrc
@@ -53,9 +53,7 @@ exclude_files = {
     -- contains a lot of globals
     "tests/**",
     -- TODO: refactor plugins, then remove this
-    "plugins/**",
-    -- TODO: refactor profiler, then remove this
-    "profiler/**",
+    --"plugins/**",
 }
 
 -- Global objects defined by the C code
@@ -78,7 +76,9 @@ read_globals = {
     "center",
     "save_state",
     "dont_disturb",
-    "clear_desktop_selection"
+    "clear_desktop_selection",
+    "wibox",
+    "rawlen"
 }
 
 -- screen may not be read-only, because newer luacheck versions complain about
@@ -105,7 +105,7 @@ globals = {
     "taglist_occupied",
     "print",
     "echo",
-    "desktop_icons"
+    "desktop_icons",
 }
 
 -- Enable cache (uses .luacheckcache relative to this rc file).