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prism-bash.js
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prism-bash.js
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(function (Prism) {
// $ set | grep '^[A-Z][^[:space:]]*=' | cut -d= -f1 | tr '\n' '|'
// + LC_ALL, RANDOM, REPLY, SECONDS.
// + make sure PS1..4 are here as they are not always set,
// - some useless things.
var envVars = '\\b(?:BASH|BASHOPTS|BASH_ALIASES|BASH_ARGC|BASH_ARGV|BASH_CMDS|BASH_COMPLETION_COMPAT_DIR|BASH_LINENO|BASH_REMATCH|BASH_SOURCE|BASH_VERSINFO|BASH_VERSION|COLORTERM|COLUMNS|COMP_WORDBREAKS|DBUS_SESSION_BUS_ADDRESS|DEFAULTS_PATH|DESKTOP_SESSION|DIRSTACK|DISPLAY|EUID|GDMSESSION|GDM_LANG|GNOME_KEYRING_CONTROL|GNOME_KEYRING_PID|GPG_AGENT_INFO|GROUPS|HISTCONTROL|HISTFILE|HISTFILESIZE|HISTSIZE|HOME|HOSTNAME|HOSTTYPE|IFS|INSTANCE|JOB|LANG|LANGUAGE|LC_ADDRESS|LC_ALL|LC_IDENTIFICATION|LC_MEASUREMENT|LC_MONETARY|LC_NAME|LC_NUMERIC|LC_PAPER|LC_TELEPHONE|LC_TIME|LESSCLOSE|LESSOPEN|LINES|LOGNAME|LS_COLORS|MACHTYPE|MAILCHECK|MANDATORY_PATH|NO_AT_BRIDGE|OLDPWD|OPTERR|OPTIND|ORBIT_SOCKETDIR|OSTYPE|PAPERSIZE|PATH|PIPESTATUS|PPID|PS1|PS2|PS3|PS4|PWD|RANDOM|REPLY|SECONDS|SELINUX_INIT|SESSION|SESSIONTYPE|SESSION_MANAGER|SHELL|SHELLOPTS|SHLVL|SSH_AUTH_SOCK|TERM|UID|UPSTART_EVENTS|UPSTART_INSTANCE|UPSTART_JOB|UPSTART_SESSION|USER|WINDOWID|XAUTHORITY|XDG_CONFIG_DIRS|XDG_CURRENT_DESKTOP|XDG_DATA_DIRS|XDG_GREETER_DATA_DIR|XDG_MENU_PREFIX|XDG_RUNTIME_DIR|XDG_SEAT|XDG_SEAT_PATH|XDG_SESSION_DESKTOP|XDG_SESSION_ID|XDG_SESSION_PATH|XDG_SESSION_TYPE|XDG_VTNR|XMODIFIERS)\\b';
var commandAfterHeredoc = {
pattern: /(^(["']?)\w+\2)[ \t]+\S.*/,
lookbehind: true,
alias: 'punctuation', // this looks reasonably well in all themes
inside: null // see below
};
var insideString = {
'bash': commandAfterHeredoc,
'environment': {
pattern: RegExp('\\$' + envVars),
alias: 'constant'
},
'variable': [
// [0]: Arithmetic Environment
{
pattern: /\$?\(\([\s\S]+?\)\)/,
greedy: true,
inside: {
// If there is a $ sign at the beginning highlight $(( and )) as variable
'variable': [
{
pattern: /(^\$\(\([\s\S]+)\)\)/,
lookbehind: true
},
/^\$\(\(/
],
'number': /\b0x[\dA-Fa-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:[Ee]-?\d+)?/,
// Operators according to https://www.gnu.org/software/bash/manual/bashref.html#Shell-Arithmetic
'operator': /--|\+\+|\*\*=?|<<=?|>>=?|&&|\|\||[=!+\-*/%<>^&|]=?|[?~:]/,
// If there is no $ sign at the beginning highlight (( and )) as punctuation
'punctuation': /\(\(?|\)\)?|,|;/
}
},
// [1]: Command Substitution
{
pattern: /\$\((?:\([^)]+\)|[^()])+\)|`[^`]+`/,
greedy: true,
inside: {
'variable': /^\$\(|^`|\)$|`$/
}
},
// [2]: Brace expansion
{
pattern: /\$\{[^}]+\}/,
greedy: true,
inside: {
'operator': /:[-=?+]?|[!\/]|##?|%%?|\^\^?|,,?/,
'punctuation': /[\[\]]/,
'environment': {
pattern: RegExp('(\\{)' + envVars),
lookbehind: true,
alias: 'constant'
}
}
},
/\$(?:\w+|[#?*!@$])/
],
// Escape sequences from echo and printf's manuals, and escaped quotes.
'entity': /\\(?:[abceEfnrtv\\"]|O?[0-7]{1,3}|U[0-9a-fA-F]{8}|u[0-9a-fA-F]{4}|x[0-9a-fA-F]{1,2})/
};
Prism.languages.bash = {
'shebang': {
pattern: /^#!\s*\/.*/,
alias: 'important'
},
'comment': {
pattern: /(^|[^"{\\$])#.*/,
lookbehind: true
},
'function-name': [
// a) function foo {
// b) foo() {
// c) function foo() {
// but not “foo {”
{
// a) and c)
pattern: /(\bfunction\s+)[\w-]+(?=(?:\s*\(?:\s*\))?\s*\{)/,
lookbehind: true,
alias: 'function'
},
{
// b)
pattern: /\b[\w-]+(?=\s*\(\s*\)\s*\{)/,
alias: 'function'
}
],
// Highlight variable names as variables in for and select beginnings.
'for-or-select': {
pattern: /(\b(?:for|select)\s+)\w+(?=\s+in\s)/,
alias: 'variable',
lookbehind: true
},
// Highlight variable names as variables in the left-hand part
// of assignments (“=” and “+=”).
'assign-left': {
pattern: /(^|[\s;|&]|[<>]\()\w+(?:\.\w+)*(?=\+?=)/,
inside: {
'environment': {
pattern: RegExp('(^|[\\s;|&]|[<>]\\()' + envVars),
lookbehind: true,
alias: 'constant'
}
},
alias: 'variable',
lookbehind: true
},
// Highlight parameter names as variables
'parameter': {
pattern: /(^|\s)-{1,2}(?:\w+:[+-]?)?\w+(?:\.\w+)*(?=[=\s]|$)/,
alias: 'variable',
lookbehind: true
},
'string': [
// Support for Here-documents https://en.wikipedia.org/wiki/Here_document
{
pattern: /((?:^|[^<])<<-?\s*)(\w+)\s[\s\S]*?(?:\r?\n|\r)\2/,
lookbehind: true,
greedy: true,
inside: insideString
},
// Here-document with quotes around the tag
// → No expansion (so no “inside”).
{
pattern: /((?:^|[^<])<<-?\s*)(["'])(\w+)\2\s[\s\S]*?(?:\r?\n|\r)\3/,
lookbehind: true,
greedy: true,
inside: {
'bash': commandAfterHeredoc
}
},
// “Normal” string
{
// https://www.gnu.org/software/bash/manual/html_node/Double-Quotes.html
pattern: /(^|[^\\](?:\\\\)*)"(?:\\[\s\S]|\$\([^)]+\)|\$(?!\()|`[^`]+`|[^"\\`$])*"/,
lookbehind: true,
greedy: true,
inside: insideString
},
{
// https://www.gnu.org/software/bash/manual/html_node/Single-Quotes.html
pattern: /(^|[^$\\])'[^']*'/,
lookbehind: true,
greedy: true
},
{
// https://www.gnu.org/software/bash/manual/html_node/ANSI_002dC-Quoting.html
pattern: /\$'(?:[^'\\]|\\[\s\S])*'/,
greedy: true,
inside: {
'entity': insideString.entity
}
}
],
'environment': {
pattern: RegExp('\\$?' + envVars),
alias: 'constant'
},
'variable': insideString.variable,
'function': {
pattern: /(^|[\s;|&]|[<>]\()(?:add|apropos|apt|apt-cache|apt-get|aptitude|aspell|automysqlbackup|awk|basename|bash|bc|bconsole|bg|bzip2|cal|cargo|cat|cfdisk|chgrp|chkconfig|chmod|chown|chroot|cksum|clear|cmp|column|comm|composer|cp|cron|crontab|csplit|curl|cut|date|dc|dd|ddrescue|debootstrap|df|diff|diff3|dig|dir|dircolors|dirname|dirs|dmesg|docker|docker-compose|du|egrep|eject|env|ethtool|expand|expect|expr|fdformat|fdisk|fg|fgrep|file|find|fmt|fold|format|free|fsck|ftp|fuser|gawk|git|gparted|grep|groupadd|groupdel|groupmod|groups|grub-mkconfig|gzip|halt|head|hg|history|host|hostname|htop|iconv|id|ifconfig|ifdown|ifup|import|install|ip|java|jobs|join|kill|killall|less|link|ln|locate|logname|logrotate|look|lpc|lpr|lprint|lprintd|lprintq|lprm|ls|lsof|lynx|make|man|mc|mdadm|mkconfig|mkdir|mke2fs|mkfifo|mkfs|mkisofs|mknod|mkswap|mmv|more|most|mount|mtools|mtr|mutt|mv|nano|nc|netstat|nice|nl|node|nohup|notify-send|npm|nslookup|op|open|parted|passwd|paste|pathchk|ping|pkill|pnpm|podman|podman-compose|popd|pr|printcap|printenv|ps|pushd|pv|quota|quotacheck|quotactl|ram|rar|rcp|reboot|remsync|rename|renice|rev|rm|rmdir|rpm|rsync|scp|screen|sdiff|sed|sendmail|seq|service|sftp|sh|shellcheck|shuf|shutdown|sleep|slocate|sort|split|ssh|stat|strace|su|sudo|sum|suspend|swapon|sync|sysctl|tac|tail|tar|tee|time|timeout|top|touch|tr|traceroute|tsort|tty|umount|uname|unexpand|uniq|units|unrar|unshar|unzip|update-grub|uptime|useradd|userdel|usermod|users|uudecode|uuencode|v|vcpkg|vdir|vi|vim|virsh|vmstat|wait|watch|wc|wget|whereis|which|who|whoami|write|xargs|xdg-open|yarn|yes|zenity|zip|zsh|zypper)(?=$|[)\s;|&])/,
lookbehind: true
},
'keyword': {
pattern: /(^|[\s;|&]|[<>]\()(?:case|do|done|elif|else|esac|fi|for|function|if|in|select|then|until|while)(?=$|[)\s;|&])/,
lookbehind: true
},
// https://www.gnu.org/software/bash/manual/html_node/Shell-Builtin-Commands.html
'builtin': {
pattern: /(^|[\s;|&]|[<>]\()(?:\.|:|alias|bind|break|builtin|caller|cd|command|continue|declare|echo|enable|eval|exec|exit|export|getopts|hash|help|let|local|logout|mapfile|printf|pwd|read|readarray|readonly|return|set|shift|shopt|source|test|times|trap|type|typeset|ulimit|umask|unalias|unset)(?=$|[)\s;|&])/,
lookbehind: true,
// Alias added to make those easier to distinguish from strings.
alias: 'class-name'
},
'boolean': {
pattern: /(^|[\s;|&]|[<>]\()(?:false|true)(?=$|[)\s;|&])/,
lookbehind: true
},
'file-descriptor': {
pattern: /\B&\d\b/,
alias: 'important'
},
'operator': {
// Lots of redirections here, but not just that.
pattern: /\d?<>|>\||\+=|=[=~]?|!=?|<<[<-]?|[&\d]?>>|\d[<>]&?|[<>][&=]?|&[>&]?|\|[&|]?/,
inside: {
'file-descriptor': {
pattern: /^\d/,
alias: 'important'
}
}
},
'punctuation': /\$?\(\(?|\)\)?|\.\.|[{}[\];\\]/,
'number': {
pattern: /(^|\s)(?:[1-9]\d*|0)(?:[.,]\d+)?\b/,
lookbehind: true
}
};
commandAfterHeredoc.inside = Prism.languages.bash;
/* Patterns in command substitution. */
var toBeCopied = [
'comment',
'function-name',
'for-or-select',
'assign-left',
'parameter',
'string',
'environment',
'function',
'keyword',
'builtin',
'boolean',
'file-descriptor',
'operator',
'punctuation',
'number'
];
var inside = insideString.variable[1].inside;
for (var i = 0; i < toBeCopied.length; i++) {
inside[toBeCopied[i]] = Prism.languages.bash[toBeCopied[i]];
}
Prism.languages.shell = Prism.languages.bash;
}(Prism));