Common collection (bash)

.env

PROFILE=sandbox

common.sh

#!/bin/bash

set -e

# see https://gist.github.com/Rud5G/b8a1057b4c1a57590773f368cbd936af

# include with:
# . $(dirname "$0")/common.sh



# Under normal circumstances, you shouldn't need to change anything below this line.
# -----------------------------------------------------------------------------

export PATH="$PATH:/usr/bin:/usr/local/bin"

# If true, all messages will be printed. If false, only fatal errors are printed.
DEBUG=${DEBUG:-true}

# Usage: msg <message>
#
#   Writes <message> to STDERR.
msg() {
    local message="$1"
    echo "$message" 1>&2 || true
}

# Usage: debugmsg <message>
#
#   Writes <message> to STDERR only if $DEBUG is true, otherwise has no effect.
debugmsg() {
    local message="$1"
    ($DEBUG && msg "$message") || true
}

# Usage: error_exit <message>
#
#   Writes <message> to STDERR as a "fatal" and immediately exits the currently running script.
error_exit() {
    local message="$1"
    echo "[FATAL] $message" 1>&2
    exit 1
}

read_dotenv_exports() {
    local dotenvfile="${1:-.env}"
    local dir="$(pwd)"
    set -o allexport
    source "$dir/$dotenvfile"
    set +o allexport
}

some.sh

#!/bin/bash

. $(dirname "$0")/common.sh

#
# output of running this file must be:
#   example
#   output 2
#   [FATAL] exiting now
#

msg "example"

DEBUG=false

debugmsg "no output"

DEBUG=true

debugmsg "output 2"

error_exit "exiting now"