Zsh: Make functions also usable as shell scripts

.config/zsh/functions/cat-highlight

@@ -1,11 +1,9 @@
-# -*- mode: shell-script; -*-
-
+#!/usr/bin/env zsh
 # Highlight cat output with whatever less is using for highlighting. The command
 # in $LESSOPEN needs to be able to work with multiple files.
-function cat-highlight()
-{
-    # Check if we are in a terminal and $LESSOPEN is not empty
-    if [[ -t 1 && -n "${LESSOPEN}" ]]; then
+
+# Check if we are in a terminal and $LESSOPEN is not empty
+if [[ -t 1 && -n "${LESSOPEN}" ]]; then
     local -a args
     local -a files
     for arg in "${@}"; do
@@ -19,7 +17,6 @@ function cat-highlight()
 
     local catopen="${LESSOPEN/|/}"
     eval "${catopen/\%s/${files}} | \cat ${args}"
-    else
+else
     \cat "${@}"
-    fi
-}
+fi

.config/zsh/functions/export-emacs

@@ -1,18 +1,15 @@
-# -*- mode: shell-script; -*-
-
+#!/usr/bin/env zsh
 # Export variable to Emacs.
-function export-emacs
-{
-    if [[ ARGC -eq 0 ]]; then
+
+if [[ ARGC -eq 0 ]]; then
     print -u 2 "Usage: ${0} <variable> …"
     return 1
-    fi
+fi
 
-    # Fail if we can't communicate with the daemon
-    [[ "$(emacsclient -e t)" == 't' ]] || return 1
+# Fail if we can't communicate with the daemon
+[[ "$(emacsclient -e t)" == 't' ]] || return 1
 
-    for name in "${@}"; do
+for name in "${@}"; do
     value=$(eval print \"\$${name}\")
     emacsclient -e "(setenv \"${name}\" \"${value}\")" >/dev/null
-    done
-}
+done

.config/zsh/functions/gdb_get_backtrace

@@ -1,19 +1,16 @@
-# -*- mode: shell-script; -*-
-
+#!/usr/bin/env zsh
 # Get backtrace from gdb
-function gdb_get_backtrace()
-{
-    if [[ ${ARGC} -ne 2 ]]; then
+
+if [[ ${ARGC} -ne 2 ]]; then
     print -u 2 "Usage: ${0} <executable> <core dump>"
     return 1
-    fi
-    local exe="${1}"
-    local core="${2}"
+fi
+local exe="${1}"
+local core="${2}"
 
-    gdb "${exe}" \
+gdb "${exe}" \
     --core "${core}" \
     --batch \
     --quiet \
     -ex "thread apply all bt full" \
     -ex "quit"
-}

.config/zsh/functions/mksmol

@@ -1,18 +1,15 @@
-# -*- mode: shell-script; -*-
-
+#!/usr/bin/env zsh
 # Makes all files in <directory> lower case. Works with Non-ASCII characters.
 # Equivalent to `zmv "${dir}/(*)" '${dir}/${1:l}'`
-function mksmol()
-{
-    if [[ ${ARGC} -ne 1 ]]; then
+
+if [[ ${ARGC} -ne 1 ]]; then
     print -u 2 "Usage: ${0} <directory>" >&2
     return 1
-    fi
-    local dir="${1}"
+fi
+local dir="${1}"
 
-    for file in "${dir}"/*; do
+for file in "${dir}"/*; do
     basename="${file##*/}"
     newfile="${dir}/${basename:l}"
     [[ "${file}" != "${newfile}" ]] && mv "${file}" "${newfile}" || :
-    done
-}
+done