diff --git a/Makefile b/Makefile
index 9c99aed0c..ea743dd35 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,6 @@
 
 .DEFAULT_GOAL=help
 export MTOOLS=./manage
-export MSTATIC=./utils/manage_static.sh
 
 include utils/makefile.include
 
@@ -60,8 +59,8 @@ test.shell:
 	$(Q)shellcheck -x -s bash \
 		utils/brand.env \
 		$(MTOOLS) \
-		$(MSTATIC) \
 		utils/lib.sh \
+		utils/lib_static.sh \
 	        utils/filtron.sh \
 	        utils/searx.sh \
 	        utils/morty.sh \
@@ -85,6 +84,7 @@ MANAGE += pyenv pyenv.install pyenv.uninstall
 MANAGE += pypi.upload pypi.upload.test
 MANAGE += test.yamllint test.pylint test.pep8 test.unit test.coverage test.robot test.clean
 MANAGE += themes.all themes.oscar themes.simple pygments.less
+MANAGE += static.build.commit static.build.drop static.build.restore
 
 PHONY += $(MANAGE)
 
@@ -92,11 +92,6 @@ $(MANAGE):
 	$(Q)$(MTOOLS) $@
 
 
-MANAGE_STATIC += static.build.commit.drop static.build.commit static.git.restore.staged static.git.restore
-
-$(MANAGE_STATIC):
-	$(Q)$(MSTATIC) $@
-
 # deprecated
 
 PHONY += docs docs-clean docs-live docker themes
diff --git a/manage b/manage
index f9e6861b0..7ddf3b7c2 100755
--- a/manage
+++ b/manage
@@ -9,6 +9,9 @@ source "$(dirname "${BASH_SOURCE[0]}")/utils/lib.sh"
 source "${REPO_ROOT}/utils/brand.env"
 source_dot_config
 
+# shellcheck source=utils/lib_static.sh
+source "$(dirname "${BASH_SOURCE[0]}")/utils/lib_static.sh"
+
 # config
 
 PYOBJECTS="searx"
@@ -42,53 +45,54 @@ PYLINT_OPTIONS="-m pylint -j 0 --rcfile .pylintrc"
 
 help() {
     cat <<EOF
-buildenv
+buildenv:
   rebuild ./utils/brand.env
-babel.compile
+babel.compile:
   pybabel compile ./searx/translations
-data.*
+data.:
   all       : update searx/languages.py and ./data/*
   languages : update searx/data/engines_languages.json & searx/languages.py
   useragents: update searx/data/useragents.json with the most recent versions of Firefox.
-docs.*
+docs.:
   html      : build HTML documentation
   live      : autobuild HTML documentation while editing
   gh-pages  : deploy on gh-pages branch
   prebuild  : build reST include files (./${DOCS_BUILD}/includes)
   clean     : clean documentation build
-docker
+docker.:
   build     : build docker image
   push      : build and push docker image
-gecko.driver
+gecko.driver:
   download & install geckodriver if not already installed (required for
   robot_tests)
-node.*
+node.:
   env       : download & install npm dependencies locally
   clean     : drop npm installations
-py.*
+py.:
   build     : Build python packages at ./${PYDIST}
   clean     : delete virtualenv and intermediate py files
-pyenv.* :
+pyenv.:
   install   : developer install of searx into virtualenv
   uninstall : uninstall developer installation
   cmd ...   : run command ... in virtualenv
   OK        : test if virtualenv is OK
 pypi.upload:
   Upload python packages to PyPi (to test use pypi.upload.test)
-test.* :
+test.:
   pylint    : lint PYLINT_FILES, searx/engines, searx & tests
   pep8      : pycodestyle (pep8) for all files except PYLINT_FILES
   unit      : run unit tests
   coverage  : run unit tests with coverage
   robot     : run robot test
   clean     : clean intermediate test stuff
-themes.* :
+themes.:
   all       : build all themes
   oscar     : build oscar theme
   simple    : build simple theme
-pygments.* :
+pygments.:
   less      : build LESS files for pygments
 EOF
+    static_help
 }
 
 
diff --git a/utils/lib_static.sh b/utils/lib_static.sh
new file mode 100755
index 000000000..0d4ba9bad
--- /dev/null
+++ b/utils/lib_static.sh
@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+
+STATIC_BUILD_COMMIT="[build] /static"
+STATIC_BUILT_PATHS=(
+    searx/static/themes/oscar/css
+    searx/static/themes/oscar/js
+    searx/static/themes/oscar/src/generated/pygments-logicodev.less
+    searx/static/themes/oscar/src/generated/pygments-pointhi.less
+    searx/static/themes/simple/css
+    searx/static/themes/simple/js
+    searx/static/themes/simple/src/generated/pygments.less
+)
+
+static_help(){
+    cat <<EOF
+static.build.:  ${STATIC_BUILD_COMMIT}
+  commit    : build & commit /static folder
+  drop      : drop last commit if it was previously done by static.build.commit
+  restore   : git restore of the /static folder (after themes.all)
+EOF
+}
+
+is.static.build.commit() {
+
+    local commit_sha="$1"
+    local commit_message
+    local commit_files
+
+    # check commit message
+    commit_message=$(git show -s --format=%s "${commit_sha}")
+    if [ "${commit_message}" != "${STATIC_BUILD_COMMIT}" ]; then
+        err_msg "expecting commit message: '${STATIC_BUILD_COMMIT}'"
+        err_msg "commit message of ${commit_sha} is: '${commit_message}'"
+        return 1
+    fi
+
+    # check all files of the commit belongs to $STATIC_BUILT_PATHS
+    commit_files=$(git diff-tree --no-commit-id --name-only -r "${commit_sha}")
+    for i in ${STATIC_BUILT_PATHS[*]}; do
+        # remove files of ${STATIC_BUILT_PATHS}
+        commit_files=$(echo "${commit_files}" | grep -v "^${i}")
+    done
+
+    if [ -n "${commit_files}" ]; then
+        err_msg "commit ${commit_sha} contains files not a part of ${STATIC_BUILD_COMMIT}"
+        echo "${commit_files}" | prefix_stdout "  "
+        return 2
+    fi
+    return 0
+}
+
+static.build.drop() {
+    # drop last commit if it was made by the static.build.commit command
+
+    local last_commit_id
+    local branch
+
+    build_msg STATIC "drop last commit if it was previously done by static.build.commit"
+
+    # get only last (option -n1) local commit not in remotes
+    branch="$(git branch --show-current)"
+    last_commit_id="$(git log -n1 "${branch}" --pretty=format:'%h'\
+     --not --exclude="${branch}" --branches --remotes)"
+
+    if [ -z "${last_commit_id}" ]; then
+        err_msg "there are no local commits"
+        return 1
+    fi
+
+    if ! is.static.build.commit "${last_commit_id}"; then
+        return $?
+    fi
+
+    build_msg STATIC "drop last commit ${last_commit_id}"
+    git reset --hard HEAD~1
+}
+
+static.build.commit() {
+    # call the "static.build.drop" command, then "themes.all" then commit the
+    # built files ($BUILT_PATHS).
+
+    build_msg STATIC "build & commit /static files"
+
+    # check for not commited files
+    if [ -n "$(git diff --name-only)" ]; then
+        err_msg "some files are not commited:"
+        git diff --name-only | prefix_stdout "  "
+        return 1
+    fi
+
+    # check for staged files
+    if [ -n "$(git diff --name-only --cached)" ]; then
+        err_msg "some files are staged:"
+        git diff --name-only --cached | prefix_stdout "  "
+        return 1
+    fi
+
+    # drop existing commit from previos build
+    static.build.drop &>/dev/null
+
+    (   set -e
+        # build the themes
+        themes.all
+
+        # add build files
+        for built_path in "${STATIC_BUILT_PATHS[@]}"; do
+            git add -v "${built_path}"
+        done
+
+        # check for modified files that are not staged
+        if [ -n "$(git diff --name-only)" ]; then
+            die 42 "themes.all has created files that are not in STATIC_BUILT_PATHS"
+        fi
+        git commit -m "${STATIC_BUILD_COMMIT}"
+    )
+}
+
+static.build.restore() {
+    build_msg STATIC "git-restore of the built files (/static)"
+    git restore --staged "${STATIC_BUILT_PATHS[@]}"
+    git restore --worktree "${STATIC_BUILT_PATHS[@]}"
+}
diff --git a/utils/manage_static.sh b/utils/manage_static.sh
deleted file mode 100755
index dc0fe2fed..000000000
--- a/utils/manage_static.sh
+++ /dev/null
@@ -1,133 +0,0 @@
-#!/usr/bin/env bash
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-BUILD_COMMIT_MESSAGE="[build] /static"
-
-BUILT_PATHS=(
-    searx/static/themes/oscar/css
-    searx/static/themes/oscar/js
-    searx/static/themes/oscar/src/generated/pygments-logicodev.less
-    searx/static/themes/oscar/src/generated/pygments-pointhi.less
-    searx/static/themes/simple/css
-    searx/static/themes/simple/js
-    searx/static/themes/simple/src/generated/pygments.less
-)
-
-is.build.commit() {
-    local commit_sha="$1"
-    local commit_message
-    local commit_files
-
-    # check commit message
-    commit_message=$(git show -s --format=%s "${commit_sha}")
-    if [ "${commit_message}" != "${BUILD_COMMIT_MESSAGE}" ]; then
-        echo "Commit message of ${commit_sha} is '${commit_message}'"
-        return 1
-    fi
-
-    # check all files of the commit belongs to $BUILT_PATHS
-    commit_files=$(git diff-tree --no-commit-id --name-only -r "${commit_sha}")
-    for i in ${BUILT_PATHS[*]}; do
-        # remove files of ${BUILT_PATHS}
-        commit_files=$(echo "${commit_files}" | grep -v "^${i}")
-    done
-
-    if [ -n "${commit_files}" ]; then
-        echo "Commit $1 contains files that were not build: ${commit_files}"
-        return 2
-    fi
-    return 0
-}
-
-
-static.build.commit.drop() {
-    local last_commit_id
-    local branch
-
-    # get only last (option -n1) local commit not in remotes
-    branch="$(git branch --show-current)"
-    last_commit_id="$(git log -n1 "${branch}" --pretty=format:'%h'\
-     --not --exclude="${branch}" --branches --remotes)"
-
-    if [ -z "${last_commit_id}" ]; then
-        echo "Empty branch"
-        return 1
-    fi
-
-    if ! is.build.commit "${last_commit_id}"; then
-        return $?
-    fi
-    echo "Drop last commit ${last_commit_id}"
-    git reset --hard HEAD~1
-}
-
-static.build.commit() {
-    local staged_files
-
-    # check for not commited files
-    if [ -n "$(git diff --name-only)" ]; then
-        echo "Some files are not commited:"
-        echo "${NOT_COMMITED_FILES}"
-        return 1
-    fi
-
-    staged_files=$(git diff --name-only --cached)
-
-    # check for staged files
-    if [ -n "${staged_files}" ]; then
-        echo "Some files are staged:"
-        echo "${staged_files}"
-        return 1
-    fi
-
-    # drop existing commit
-    if static.commit.drop; then
-        return $?
-    fi
-
-    (
-        set -e
-        # build the themes
-        make themes.all
-
-        # add build files
-        for built_path in "${BUILT_PATHS[@]}"; do
-            git add -v "${built_path}"
-        done
-
-        # check for modified files that are not staged
-        if [ -n "$(git diff --name-only)" ]; then
-            echo "make themes.all has created files that are not in BUILT_PATHS"
-            return 2
-        fi
-        git commit -m "${BUILD_COMMIT_MESSAGE}"
-    )
-}
-
-
-main() {
-    case $1 in
-        static.build.commit.drop)
-            # drop last commit if it was made by the "commit" command
-            static.build.commit.drop
-            ;;
-        static.build.commit)
-            # call the "static.build.commit.drop" command,
-            # then "make themes.all"
-            # then commit the built files ($BUILT_PATHS).
-            static.build.commit
-            ;;
-        static.git.restore.staged)
-            # after "git add ."
-            # remove the built files
-            # so only the source are commited
-            git restore --staged "${BUILT_PATHS[@]}"
-            ;;
-        static.git.restore)
-            # "git restore" of the built files.
-            git restore --worktree --staged "${BUILT_PATHS[@]}"
-            ;;
-    esac
-}
-
-main "$@"