117 lines
5.4 KiB
Markdown
117 lines
5.4 KiB
Markdown
zsh-syntax-highlighting / highlighters / main
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---------------------------------------------
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This is the `main` highlighter, that highlights:
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* Commands
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* Options
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* Arguments
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* Paths
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* Strings
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This highlighter is active by default.
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### How to tweak it
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This highlighter defines the following styles:
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* `unknown-token` - unknown tokens / errors
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* `reserved-word` - shell reserved words (`if`, `for`)
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* `alias` - aliases
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* `suffix-alias` - suffix aliases (requires zsh 5.1.1 or newer)
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* `builtin` - shell builtin commands (`shift`, `pwd`, `zstyle`)
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* `function` - function names
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* `command` - command names
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* `precommand` - precommand modifiers (e.g., `noglob`, `builtin`)
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* `commandseparator` - command separation tokens (`;`, `&&`)
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* `hashed-command` - hashed commands
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* `path` - existing filenames
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* `path_pathseparator` - path separators in filenames (`/`); if unset, `path` is used (default)
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* `path_prefix` - prefixes of existing filenames
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* `path_prefix_pathseparator` - path separators in prefixes of existing filenames (`/`); if unset, `path_prefix` is used (default)
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* `globbing` - globbing expressions (`*.txt`)
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* `history-expansion` - history expansion expressions (`!foo` and `^foo^bar`)
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* `command-substitution` - command substitutions (`$(echo foo)`)
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* `command-substitution-unquoted` - an unquoted command substitution (`$(echo foo)`)
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* `command-substitution-quoted` - a quoted command substitution (`"$(echo foo)"`)
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* `command-substitution-delimiter` - command substitution delimiters (`$(` and `)`)
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* `command-substitution-delimiter-unquoted` - an unquoted command substitution delimiters (`$(` and `)`)
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* `command-substitution-delimiter-quoted` - a quoted command substitution delimiters (`"$(` and `)"`)
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* `process-substitution` - process substitutions (`<(echo foo)`)
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* `process-substitution-delimiter` - process substitution delimiters (`<(` and `)`)
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* `single-hyphen-option` - single-hyphen options (`-o`)
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* `double-hyphen-option` - double-hyphen options (`--option`)
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* `back-quoted-argument` - backtick command substitution (`` `foo` ``)
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* `back-quoted-argument-unclosed` - unclosed backtick command substitution (`` `foo ``)
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* `back-quoted-argument-delimiter` - backtick command substitution delimiters (`` ` ``)
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* `single-quoted-argument` - single-quoted arguments (`` 'foo' ``)
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* `single-quoted-argument-unclosed` - unclosed single-quoted arguments (`` 'foo ``)
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* `double-quoted-argument` - double-quoted arguments (`` "foo" ``)
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* `double-quoted-argument-unclosed` - unclosed double-quoted arguments (`` "foo ``)
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* `dollar-quoted-argument` - dollar-quoted arguments (`` $'foo' ``)
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* `dollar-quoted-argument-unclosed` - unclosed dollar-quoted arguments (`` $'foo ``)
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* `rc-quote` - two single quotes inside single quotes when the `RC_QUOTES` option is set (`` 'foo''bar' ``)
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* `dollar-double-quoted-argument` - parameter expansion inside double quotes (`$foo` inside `""`)
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* `back-double-quoted-argument` - backslash escape sequences inside double-quoted arguments (`\"` in `"foo\"bar"`)
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* `back-dollar-quoted-argument` - backslash escape sequences inside dollar-quoted arguments (`\x` in `$'\x48'`)
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* `assign` - parameter assignments (`x=foo` and `x=( )`)
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* `redirection` - redirection operators (`<`, `>`, etc)
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* `comment` - comments, when `setopt INTERACTIVE_COMMENTS` is in effect (`echo # foo`)
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* `named-fd` - named file descriptor (`echo foo {fd}>&2`)
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* `arg0` - a command word other than one of those enumerated above (other than a command, precommand, alias, function, or shell builtin command).
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* `default` - everything else
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To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
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for example in `~/.zshrc`:
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```zsh
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# Declare the variable
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typeset -A ZSH_HIGHLIGHT_STYLES
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# To differentiate aliases from other command types
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ZSH_HIGHLIGHT_STYLES[alias]='fg=magenta,bold'
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# To have paths colored instead of underlined
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ZSH_HIGHLIGHT_STYLES[path]='fg=cyan'
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# To disable highlighting of globbing expressions
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ZSH_HIGHLIGHT_STYLES[globbing]='none'
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```
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The syntax for values is the same as the syntax of "types of highlighting" of
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the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
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manual page][zshzle-Character-Highlighting].
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#### Parameters
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To avoid partial path lookups on a path, add the path to the `ZSH_HIGHLIGHT_DIRS_BLACKLIST` array.
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```zsh
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ZSH_HIGHLIGHT_DIRS_BLACKLIST+=(/mnt/slow_share)
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```
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### Useless trivia
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#### Forward compatibility.
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zsh-syntax-highlighting attempts to be forward-compatible with zsh.
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Specifically, we attempt to facilitate highlighting _command word_ types that
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had not yet been invented when this version of zsh-syntax-highlighting was
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released.
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A _command word_ is something like a function name, external command name, et
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cetera. (See
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[Simple Commands & Pipelines in `zshmisc(1)`][zshmisc-Simple-Commands-And-Pipelines]
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for a formal definition.)
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If a new _kind_ of command word is ever added to zsh — something conceptually
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different than "function" and "alias" and "external command" — then command words
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of that (new) kind will be highlighted by the style `arg0_$kind`,
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where `$kind` is the output of `type -w` on the new kind of command word. If that
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style is not defined, then the style `arg0` will be used instead.
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[zshmisc-Simple-Commands-And-Pipelines]: http://zsh.sourceforge.net/Doc/Release/Shell-Grammar.html#Simple-Commands-_0026-Pipelines
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[zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
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