new names and new script

docker-prune

@@ -0,0 +1,136 @@
+#!/bin/bash -e
+
+# template for bash scripts
+
+# internal use only
+append_msg() {
+    if test $# -ne 0; then
+        echo -en ":\e[0m \e[1m$*"
+    fi
+    echo -e "\e[0m"
+}
+
+# write a notice
+notice() {
+    if test $# -eq 0; then
+        return
+    fi
+    echo -e "\e[1m$*\e[0m" 1>&3
+}
+
+# write error message
+error() {
+    echo -en "\e[1;31merror" 1>&2
+    append_msg $* 1>&2
+}
+
+# write a warning message
+warning() {
+    echo -en "\e[1;33mwarning" 1>&2
+    append_msg $* 1>&2
+}
+
+# write a success message
+success() {
+    echo -en "\e[1;32msuccess" 1>&2
+    append_msg $* 1>&2
+}
+
+# commandline parameter evaluation
+filter="until=24h"
+while test $# -gt 0; do
+    case "$1" in
+        (--help|-h) less <<EOF
+SYNOPSIS
+
+  $0 [OPTIONS]
+
+OPTIONS
+
+  --help, -h                 show this help
+  --filter, -f <filter>      define filter (default: $filter)
+  --install, -i              install to daily crontab
+
+DESCRIPTION
+
+Cleanup docker. Removes all docker container that are not running,
+then removes all unused docker images.
+
+EOF
+                    exit;;
+        (--filter|-f) shift; filter="$1";;
+        (--install|-i) sudo cp $0 /etc/cron.daily/docker-prune; exit;;
+        (*) error "unknow option $1, try $0 --help"; exit 1;;
+    esac
+    if test $# -eq 0; then
+        error "missing parameter, try $0 --help"; exit 1
+    fi
+    shift;
+done
+
+# run a command, print the result and abort in case of error
+# option: --no-check: ignore the result, continue in case of error
+run() {
+    check=1
+    while test $# -gt 0; do
+        case "$1" in
+            (--no-check) check=0;;
+            (*) break;;
+        esac
+        shift;
+    done
+    echo -en "\e[1m-> running:\e[0m $* ..."
+    result=$($* 2>&1)
+    res=$?
+    if test $res -ne 0; then
+        if test $check -eq 1; then
+            error "failed with return code: $res"
+            if test -n "$result"; then
+                echo "$result"
+            fi
+            exit 1
+        else
+            warning "ignored return code: $res"
+        fi
+    else
+        success
+    fi
+}
+
+# error handler
+function traperror() {
+    set +x
+    local err=($1) # error status
+    local line="$2" # LINENO
+    local linecallfunc="$3"
+    local command="$4"
+    local funcstack="$5"
+    for e in ${err[@]}; do
+        if test -n "$e" -a "$e" != "0"; then
+            error "line $line - command '$command' exited with status: $e (${err[@]})"
+            if [ "${funcstack}" != "main" -o "$linecallfunc" != "0" ]; then
+                echo -n "   ... error at ${funcstack} "
+                if [ "$linecallfunc" != "" ]; then
+                    echo -n "called at line $linecallfunc"
+                fi
+                echo
+            fi
+            exit $e
+        fi
+    done
+    success
+    exit 0
+}
+
+# catch errors
+trap 'traperror "$? ${PIPESTATUS[@]}" $LINENO $BASH_LINENO "$BASH_COMMAND" "${FUNCNAME[@]}" "${FUNCTION}"' ERR SIGINT INT TERM EXIT
+
+##########################################################################################
+
+if test -z "$filter"; then
+    run docker container prune -f
+    run docker image prune -a -f
+else
+    run docker container prune -f --filter "$filter"
+    run docker image prune -a -f --filter "$filter"
+fi