initial working ffmpeg static/shared

scripts/common.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+# shellcheck disable=SC2034
+
+# ANSI colors
+RED='\e[0;31m'
+CYAN='\e[0;36m'
+GREEN='\e[0;32m'
+YELLOW='\e[0;33m'
+NC='\e[0m'
+
+# echo wrappers
+echo_fail() { echo -e "${RED}FAIL${NC}:" "$@" ; }
+echo_info() { echo -e "${CYAN}INFO${NC}:" "$@" ; }
+echo_pass() { echo -e "${GREEN}PASS${NC}:" "$@" ; }
+echo_warn() { echo -e "${YELLOW}WARN${NC}:" "$@" ; }
+echo_exit() { echo_fail "$@" ; exit 1 ; }
+
+echo_if_fail() {
+    local cmd=("$@")
+    local out="/tmp/.stdout-${RANDOM}"
+    local err="/tmp/.stderr-${RANDOM}"
+    "${cmd[@]}" > ${out} 2> ${err}
+    local retval=$?
+    if ! test ${retval} -eq 0; then
+        echo
+        echo_fail "command [" "${cmd[@]}" "] failed"
+        echo_warn "command output:"
+        tail -n 10 ${out}
+        tail -n 10 ${err}
+        echo
+    fi
+    rm ${out} ${err}
+    return ${retval}
+}