Sandbox::https://github.com/szepeviktor/debian-server-tools/blob/master/update.sh

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#!/bin/bash

# Show update instruction for installed tools.

# VERSION :0.1.2

# DATE :2015-07-06

# AUTHOR :Viktor Szépe <viktor@szepe.net>

# LICENSE :The MIT License (MIT)

# URL :https://github.com/szepeviktor/debian-server-tools

# BASH-VERSION :4.2+

# DEPENDS :apt-get install colordiff

# Show also colorized diffs.

# ./update.sh -d

Get_meta() {

# defaults to self

local FILE="${1:-$0}"

# defaults to "VERSION"

local META="${2:-VERSION}"

local VALUE

VALUE="$(head -n 30 "$FILE" | grep -m 1 "^# ${META}\\s*:" | cut -d ":" -f 2-)"

if [ -z "$VALUE" ]; then

VALUE="(unknown)"

echo "$VALUE"

}

PARAM="$1"

hash colordiff 2>/dev/null || unset PARAM

#Input_motd Get_meta input/update-motd.d - Get_meta /etc/update-motd.d/update-motd.d

D="$(dirname "$0")"

find . -type f -size -100k -not -name README.md -not -path "*/.git*" -printf '%P\n' \

| while read -r FILE; do

SCRIPT="$(Get_meta "$FILE" LOCATION)"

if [ -z "$SCRIPT" ] || [ "$SCRIPT" == "(unknown)" ] || [ ! -f "$SCRIPT" ]; then

continue

OLD_VERSION="$(Get_meta "$SCRIPT")"

CURRENT_VERSION="$(Get_meta "$FILE")"

if [ "$OLD_VERSION" == "$CURRENT_VERSION" ]; then

continue

echo "# Update ${FILE}: ${OLD_VERSION} -> ${CURRENT_VERSION}"

echo "${D}/install.sh ${FILE}"

if [ "$PARAM" == "-d" ]; then

colordiff -w -B "$SCRIPT" "$FILE"

done