Add zsh completion

assets/completions/bat.zsh

@@ -0,0 +1,56 @@
+#compdef bat
+# FIXME: help me with the subcommand `cache`, zsh completion is hard as hell
+
+local -a args
+local state
+
+args=(
+    '(-A --show-all)'{-A,--show-all}'[Show non-printable characters (space, tab, newline, ..)]'
+    {-p,--plain}'[Show plain style (alias for `--style=plain`)]:When `-p` is used twice (`-pp`), it also disables automatic paging (alias for `--style=plain --paging=never`)'
+    '(-l --language)'{-l+,--language=}'[Set the language for syntax highlighting]:<language>:->language'
+    '(-H --highlight-line)'{-H,--highlight-line}'[Highlight lines N through M]:<N\:M>...'
+    '(--file-name)'--file-name'[Specify the name to display for a file]:<name>...:_files'
+    '(-d --diff)'--diff'[Only show lines that have been added/removed/modified]'
+    '(--diff-context)'--diff-context'[Include N lines of context around added/removed/modified lines when using `--diff`]:<N> (lines):()'
+    '(--tabs)'--tabs'[Set the tab width to T spaces]:<T> (tab width):()'
+    '(--wrap)'--wrap='[Specify the text-wrapping mode]:<when>:(auto never character)'
+    '(--terminal-width)'--terminal-width'[Explicitly set the width of the terminal instead of determining it automatically]:<width>'
+    '(-n --number)'{-n,--number}'[Show line numbers]'
+    '(--color)'--color='[When to use colors]:<when>:(auto never always)'
+    '(--italic-text)'--italic-text='[Use italics in output]:<when>:(always never)'
+    '(--decorations)'--decorations='[When to show the decorations]:<when>:(auto never always)'
+    '(--paging)'--paging='[Specify when to use the pager]:<when>:(auto never always)'
+    '(-m --map-syntax)'{-m+,--map-syntax=}'[Use the specified syntax for files matching the glob pattern]:<glob\:syntax>...'
+    '(--theme)'--theme='[Set the color theme for syntax highlighting]:<theme>:->theme'
+    '(: --list-themes --list-languages -L)'--list-themes'[Display all supported highlighting themes]'
+    '(--style)'--style='[Comma-separated list of style elements to display]:<components>:->style'
+    '(-r --line-range)'{-r+,--line-range=}'[Only print the lines from N to M]:<N\:M>...'
+    '(: --list-themes --list-languages -L)'{-L,--list-languages}'[Display all supported languages]'
+    '(: -)'{-h,--help}'[Print this help message]'
+    '(: -)'{-V,--version}'[Show version information]'
+    '*: :_files'
+)
+
+_arguments -S -s $args
+
+case "$state" in 
+    language)
+        local IFS=$'\n'
+        local -a languages
+        languages=( $(bat --list-languages | awk -F':|,' '{ for (i = 1; i <= NF; ++i) printf("%s:%s\n", $i, $1) }') )
+
+        _describe 'language' languages 
+    ;;
+
+    theme)
+        local IFS=$'\n'
+        local -a themes
+        themes=( $(bat --list-themes | sort) )
+
+        _values 'theme' $themes
+    ;;
+
+    style)
+        _values -s , 'style' auto full plain changes header grid numbers snip
+    ;;
+esac