Zsh functions: set options for better error handling

.config/zsh/functions/ansi-colours

@@ -4,6 +4,8 @@
 # https://tintin.mudhalla.net/info/256color/
 # https://gist.github.com/Prakasaka/219fe5695beeb4d6311583e79933a009
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 function _ansi-colors_8()
 {
     local title="${1}"

.config/zsh/functions/btrfs-snapshot-compare

@@ -1,6 +1,8 @@
 #!/usr/bin/env zsh
 # Compare 2 Btrfs snapshots
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 if [[ ${ARGC} -lt 2 ]]; then
     print -u 2 "Usage: ${0} <old> <new>"
     return 1

.config/zsh/functions/cat-highlight

@@ -7,6 +7,8 @@
 # export CATOPEN="highlight --force --out-format=truecolor --stdout %s"
 # alias cat='cat-highlight'
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 # Check if we are in a terminal and a highlighter is defined
 if [[ -t 1 ]] && [[ -n "${CATOPEN}" || -n "${LESSOPEN}" ]]; then
     if [[ -z "${CATOPEN}" ]]; then

.config/zsh/functions/die

@@ -4,6 +4,8 @@
 # number. Will return instead of exit when the shell is interactive.
 # Put this in ${fpath} and load it with `autoload -U die`.
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 local errorcode=${?}
 if [[ -v 1 && ${1} =~ '^[0-9]+$' ]]; then
     errorcode=${1}

.config/zsh/functions/export-emacs

@@ -1,6 +1,8 @@
 #!/usr/bin/env zsh
 # Export variable to Emacs.
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 if [[ ARGC -eq 0 ]]; then
     print -u 2 "Usage: ${0} <variable> …"
     return 1

.config/zsh/functions/gdb_get_backtrace

@@ -1,6 +1,8 @@
 #!/usr/bin/env zsh
 # Get backtrace from gdb
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 if [[ ${ARGC} -ne 2 ]]; then
     print -u 2 "Usage: ${0} <executable> <core dump>"
     return 1

.config/zsh/functions/mksmol

@@ -2,6 +2,8 @@
 # Makes all files in <directory> lower case. Works with Non-ASCII characters.
 # Equivalent to `zmv "${dir}/(*)" '${dir}/${1:l}'`
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 if [[ ${ARGC} -ne 1 ]]; then
     print -u 2 "Usage: ${0} <directory>"
     return 1

.config/zsh/functions/putwww

@@ -1,6 +1,8 @@
 #!/usr/bin/env zsh
 # Put files on a webspace via sftp
 
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
 if [[ ${ARGC} -eq 0 ]]; then
     print -u 2 "Usage: ${0} <file> …"
     return 1