nano/doc/syntax/sh.nanorc

## Here is an example for Bourne shell scripts.

syntax "sh" "\.sh$"
header "^#!.*/(ba|k|pdk)?sh[-0-9_]*"
magic "(POSIX|Bourne.*) shell script text"

icolor brightgreen "^[0-9A-Z_]+\(\)"
color green "\<(break|case|continue|do|done|elif|else|esac|exit|fi|for|function|if|in|read|return|select|shift|then|time|until|while)\>"
color green "\<(declare|eval|exec|export|let|local)\>"
color green "[{}():;|`$<>!=&\\]" "(\]|\[)"
color green "-[Ldefgruwx]\>"
color green "-(eq|ne|gt|lt|ge|le|s|n|z)\>"
color brightblue "\<(awk|cat|cd|ch(grp|mod|own)|cp|echo|env|grep|install|ln|make|mkdir|mv|popd|printf|pushd|rm|rmdir|sed|set|tar|touch|umask|unset)\>"

# Basic variable names (no braces).
color brightred "\$[-0-9@*#?$!]" "\$[[:alpha:]_][[:alnum:]_]*"
# More complicated variable names; handles braces and replacements and arrays.
color brightred "\$\{[#!]?([-@*#?$!]|[0-9]+|[[:alpha:]_][[:alnum:]_]*)(\[([[:space:]]*[[:alnum:]_]+[[:space:]]*|@)\])?(([#%/]|:?[-=?+])[^}]*\}|\[|\})"

# Comments.
color cyan "(^|[[:space:]])#.*$"

# Strings.
color brightyellow ""(\\.|[^"])*"" "'(\\.|[^'])*'"

# Trailing whitespace.
color ,green "[[:space:]]+$"