refactored1

bin/bash-back

@@ -1,9 +1,8 @@
 #!/usr/bin/env bash
 
 # CONSTANTS
-TMP_ERROR=$(mktemp -t "$(basename $0).XXXXXXXX" --tmpdir=/run/user/$(id -u))
-DEBUG=${BASH_BACK_DEBUG:-false}
-SCRIPT=$1
+BASH_BACK_ERROR=$(mktemp -t "$(basename $0).XXXXXXXX" --tmpdir=/run/user/$(id -u))
+BASH_BACK_DEBUG=${BASH_BACK_DEBUG:-false}
 
 # FUNCTIONS
 
@@ -54,7 +53,7 @@ function on_exit {
   stack_summary=()
 
   if [[ $code -gt 0 ]]; then
-    last_error=$(tail -n1 $TMP_ERROR)
+    last_error=$(tail -n1 $BASH_BACK_ERROR)
     last_source=${stack_sources[0]}
     last_source=${last_source//./"\."} # replace . by \.
     regex1="^$last_source: line ([0-9]+): (.*)\$"
@@ -97,7 +96,7 @@ function on_exit {
 }
 
 function dump_summary {
-  $DEBUG && >/dev/tty echo '---stacktrace---'
+  $BASH_BACK_DEBUG && >/dev/tty echo '---stacktrace---'
   for i in "${stack_summary[@]}"; do
     >&4 echo -e "$i"
   done
@@ -105,13 +104,10 @@ function dump_summary {
 
 function dump_stderr {
   last_trim=${1:-false}
-  mapfile -t tmp_error <$TMP_ERROR
-  if $last_trim; then
-    unset tmp_error[-1]
-    tmp_error=("${tmp_error[@]}")
-  fi
+  mapfile -t tmp_error <$BASH_BACK_ERROR
+  $last_trim && unset tmp_error[-1] && tmp_error=("${tmp_error[@]}")
   if [[ "${#tmp_error[@]}" -gt 0 ]]; then
-    $DEBUG && >/dev/tty echo '---stderr---'
+    $BASH_BACK_DEBUG && >/dev/tty echo '---stderr---'
     for i in "${tmp_error[@]}"; do
       echo -e "$i"
     done
@@ -126,17 +122,20 @@ function success {
 function cleanup {
   trap - ERR TERM INT EXIT
   exec 3>&- 4>&-
-  rm $TMP_ERROR
+  rm $BASH_BACK_ERROR
 }
 
 # MAIN
 
 set -TEue -o pipefail
+[[ $# -ne 1 ]] && >&2 echo 'ERROR: script expected!' && builtin exit 1
+
 trap 'on_exit $?' ERR TERM INT EXIT
 trap 'on_return' DEBUG
 
 # magic FD
-exec 3> >(tee $TMP_ERROR >/dev/null) 4>/dev/stderr
-$DEBUG && >/dev/tty echo '---stdout---'
-source $SCRIPT 2>&3
+exec 3> >(tee $BASH_BACK_ERROR >/dev/null) 4>/dev/stderr
+
+$BASH_BACK_DEBUG && >/dev/tty echo '---stdout---'
+source $1 2>&3
 success

useless.sh

@@ -22,6 +22,10 @@ function F1 {
 
 function main {
   F1
+  F3
+  >&2 echo some trace in stderr1
+  lib/utility.bash
+  >&2 echo some trace in stderr2
 }
 
 function F3 {
@@ -30,13 +34,6 @@ function F3 {
 }
 
 echo start of useless
-F3
->&2 echo some trace in stderr1
-lib/utility.bash
->&2 echo some trace in stderr2
-
-. lib/utility.bash
-
-main
 # error
+main
 echo end of useless