fzf/src/options.go

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package fzf
import (
"fmt"
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"os"
"regexp"
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"strconv"
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"strings"
"unicode"
"unicode/utf8"
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"github.com/junegunn/fzf/src/algo"
"github.com/junegunn/fzf/src/tui"
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"github.com/mattn/go-runewidth"
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"github.com/mattn/go-shellwords"
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)
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const usage = `usage: fzf [options]
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Search
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-x, --extended Extended-search mode
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(enabled by default; +x or --no-extended to disable)
-e, --exact Enable Exact-match
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--algo=TYPE Fuzzy matching algorithm: [v1|v2] (default: v2)
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-i Case-insensitive match (default: smart-case match)
+i Case-sensitive match
--literal Do not normalize latin script letters before matching
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-n, --nth=N[,..] Comma-separated list of field index expressions
for limiting search scope. Each can be a non-zero
integer or a range expression ([BEGIN]..[END]).
--with-nth=N[,..] Transform the presentation of each line using
field index expressions
-d, --delimiter=STR Field delimiter regex (default: AWK-style)
+s, --no-sort Do not sort the result
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--tac Reverse the order of the input
--phony Do not perform search
--tiebreak=CRI[,..] Comma-separated list of sort criteria to apply
when the scores are tied [length|begin|end|index]
(default: length)
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Interface
-m, --multi[=MAX] Enable multi-select with tab/shift-tab
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--no-mouse Disable mouse
--bind=KEYBINDS Custom key bindings. Refer to the man page.
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--cycle Enable cyclic scroll
--keep-right Keep the right end of the line visible on overflow
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--no-hscroll Disable horizontal scroll
--hscroll-off=COL Number of screen columns to keep to the right of the
highlighted substring (default: 10)
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--filepath-word Make word-wise movements respect path separators
--jump-labels=CHARS Label characters for jump and jump-accept
Layout
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--height=HEIGHT[%] Display fzf window below the cursor with the given
height instead of using fullscreen
--min-height=HEIGHT Minimum height when --height is given in percent
(default: 10)
--layout=LAYOUT Choose layout: [default|reverse|reverse-list]
--border[=STYLE] Draw border around the finder
[rounded|sharp|horizontal|vertical|
top|bottom|left|right] (default: rounded)
--margin=MARGIN Screen margin (TRBL / TB,RL / T,RL,B / T,R,B,L)
--info=STYLE Finder info style [default|inline|hidden]
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--prompt=STR Input prompt (default: '> ')
--pointer=STR Pointer to the current line (default: '>')
--marker=STR Multi-select marker (default: '>')
--header=STR String to print as header
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--header-lines=N The first N lines of the input are treated as header
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Display
--ansi Enable processing of ANSI color codes
--tabstop=SPACES Number of spaces for a tab character (default: 8)
--color=COLSPEC Base scheme (dark|light|16|bw) and/or custom colors
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--no-bold Do not use bold text
History
--history=FILE History file
--history-size=N Maximum number of history entries (default: 1000)
Preview
--preview=COMMAND Command to preview highlighted line ({})
--preview-window=OPT Preview window layout (default: right:50%)
[up|down|left|right][:SIZE[%]]
[:[no]wrap][:[no]cycle][:[no]hidden]
[:rounded|sharp|noborder]
[:+SCROLL[-OFFSET]]
[:default]
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Scripting
-q, --query=STR Start the finder with the given query
-1, --select-1 Automatically select the only match
-0, --exit-0 Exit immediately when there's no match
-f, --filter=STR Filter mode. Do not start interactive finder.
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--print-query Print query as the first line
--expect=KEYS Comma-separated list of keys to complete fzf
--read0 Read input delimited by ASCII NUL characters
--print0 Print output delimited by ASCII NUL characters
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--sync Synchronous search for multi-staged filtering
--version Display version information and exit
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Environment variables
FZF_DEFAULT_COMMAND Default command to use when input is tty
FZF_DEFAULT_OPTS Default options
(e.g. '--layout=reverse --inline-info')
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`
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// Case denotes case-sensitivity of search
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type Case int
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// Case-sensitivities
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const (
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CaseSmart Case = iota
CaseIgnore
CaseRespect
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)
// Sort criteria
type criterion int
const (
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byScore criterion = iota
byLength
byBegin
byEnd
)
type sizeSpec struct {
size float64
percent bool
}
func defaultMargin() [4]sizeSpec {
return [4]sizeSpec{}
}
type windowPosition int
const (
posUp windowPosition = iota
posDown
posLeft
posRight
)
type layoutType int
const (
layoutDefault layoutType = iota
layoutReverse
layoutReverseList
)
type infoStyle int
const (
infoDefault infoStyle = iota
infoInline
infoHidden
)
type previewOpts struct {
command string
position windowPosition
size sizeSpec
scroll string
hidden bool
wrap bool
cycle bool
border tui.BorderShape
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}
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// Options stores the values of command-line options
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type Options struct {
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Fuzzy bool
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FuzzyAlgo algo.Algo
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Extended bool
Phony bool
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Case Case
Normalize bool
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Nth []Range
WithNth []Range
Delimiter Delimiter
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Sort int
Tac bool
Criteria []criterion
Multi int
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Ansi bool
Mouse bool
Theme *tui.ColorTheme
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Black bool
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Bold bool
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Height sizeSpec
MinHeight int
Layout layoutType
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Cycle bool
KeepRight bool
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Hscroll bool
HscrollOff int
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FileWord bool
InfoStyle infoStyle
JumpLabels string
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Prompt string
Pointer string
Marker string
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Query string
Select1 bool
Exit0 bool
Filter *string
ToggleSort bool
Expect map[int]string
Keymap map[int][]action
Preview previewOpts
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PrintQuery bool
ReadZero bool
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Printer func(string)
PrintSep string
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Sync bool
History *History
Header []string
HeaderLines int
Margin [4]sizeSpec
BorderShape tui.BorderShape
Unicode bool
Tabstop int
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ClearOnExit bool
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Version bool
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}
func defaultPreviewOpts(command string) previewOpts {
return previewOpts{command, posRight, sizeSpec{50, true}, "", false, false, false, tui.BorderRounded}
}
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func defaultOptions() *Options {
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return &Options{
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Fuzzy: true,
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FuzzyAlgo: algo.FuzzyMatchV2,
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Extended: true,
Phony: false,
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Case: CaseSmart,
Normalize: true,
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Nth: make([]Range, 0),
WithNth: make([]Range, 0),
Delimiter: Delimiter{},
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Sort: 1000,
Tac: false,
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Criteria: []criterion{byScore, byLength},
Multi: 0,
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Ansi: false,
Mouse: true,
Theme: tui.EmptyTheme(),
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Black: false,
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Bold: true,
MinHeight: 10,
Layout: layoutDefault,
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Cycle: false,
KeepRight: false,
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Hscroll: true,
HscrollOff: 10,
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FileWord: false,
InfoStyle: infoDefault,
JumpLabels: defaultJumpLabels,
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Prompt: "> ",
Pointer: ">",
Marker: ">",
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Query: "",
Select1: false,
Exit0: false,
Filter: nil,
ToggleSort: false,
Expect: make(map[int]string),
Keymap: make(map[int][]action),
Preview: defaultPreviewOpts(""),
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PrintQuery: false,
ReadZero: false,
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Printer: func(str string) { fmt.Println(str) },
PrintSep: "\n",
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Sync: false,
History: nil,
Header: make([]string, 0),
HeaderLines: 0,
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Margin: defaultMargin(),
Unicode: true,
Tabstop: 8,
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ClearOnExit: true,
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Version: false}
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}
func help(code int) {
os.Stdout.WriteString(usage)
os.Exit(code)
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}
func errorExit(msg string) {
os.Stderr.WriteString(msg + "\n")
os.Exit(exitError)
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}
func optString(arg string, prefixes ...string) (bool, string) {
for _, prefix := range prefixes {
if strings.HasPrefix(arg, prefix) {
return true, arg[len(prefix):]
}
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}
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return false, ""
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}
func nextString(args []string, i *int, message string) string {
if len(args) > *i+1 {
*i++
} else {
errorExit(message)
}
return args[*i]
}
func optionalNextString(args []string, i *int) (bool, string) {
if len(args) > *i+1 && !strings.HasPrefix(args[*i+1], "-") && !strings.HasPrefix(args[*i+1], "+") {
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*i++
return true, args[*i]
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}
return false, ""
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}
func atoi(str string) int {
num, err := strconv.Atoi(str)
if err != nil {
errorExit("not a valid integer: " + str)
}
return num
}
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func atof(str string) float64 {
num, err := strconv.ParseFloat(str, 64)
if err != nil {
errorExit("not a valid number: " + str)
}
return num
}
func nextInt(args []string, i *int, message string) int {
if len(args) > *i+1 {
*i++
} else {
errorExit(message)
}
return atoi(args[*i])
}
func optionalNumeric(args []string, i *int, defaultValue int) int {
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if len(args) > *i+1 {
if strings.IndexAny(args[*i+1], "0123456789") == 0 {
*i++
return atoi(args[*i])
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}
}
return defaultValue
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}
func splitNth(str string) []Range {
if match, _ := regexp.MatchString("^[0-9,-.]+$", str); !match {
errorExit("invalid format: " + str)
}
tokens := strings.Split(str, ",")
ranges := make([]Range, len(tokens))
for idx, s := range tokens {
r, ok := ParseRange(&s)
if !ok {
errorExit("invalid format: " + str)
}
ranges[idx] = r
}
return ranges
}
func delimiterRegexp(str string) Delimiter {
// Special handling of \t
str = strings.Replace(str, "\\t", "\t", -1)
// 1. Pattern does not contain any special character
if regexp.QuoteMeta(str) == str {
return Delimiter{str: &str}
}
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rx, e := regexp.Compile(str)
// 2. Pattern is not a valid regular expression
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if e != nil {
return Delimiter{str: &str}
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}
// 3. Pattern as regular expression. Slow.
return Delimiter{regex: rx}
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}
func isAlphabet(char uint8) bool {
return char >= 'a' && char <= 'z'
}
func isNumeric(char uint8) bool {
return char >= '0' && char <= '9'
}
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func parseAlgo(str string) algo.Algo {
switch str {
case "v1":
return algo.FuzzyMatchV1
case "v2":
return algo.FuzzyMatchV2
default:
errorExit("invalid algorithm (expected: v1 or v2)")
}
return algo.FuzzyMatchV2
}
func parseBorder(str string, optional bool) tui.BorderShape {
switch str {
case "rounded":
return tui.BorderRounded
case "sharp":
return tui.BorderSharp
case "horizontal":
return tui.BorderHorizontal
case "vertical":
return tui.BorderVertical
case "top":
return tui.BorderTop
case "bottom":
return tui.BorderBottom
case "left":
return tui.BorderLeft
case "right":
return tui.BorderRight
default:
if optional && str == "" {
return tui.BorderRounded
}
errorExit("invalid border style (expected: rounded|sharp|horizontal|vertical|top|bottom|left|right)")
}
return tui.BorderNone
}
func parseKeyChords(str string, message string) map[int]string {
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if len(str) == 0 {
errorExit(message)
}
tokens := strings.Split(str, ",")
Improvements to code quality and readability (#1737) * Remove 1 unused field and 3 unused functions unused elements fount by running golangci-lint run --disable-all --enable unused src/result.go:19:2: field `index` is unused (unused) index int32 ^ src/tui/light.go:716:23: func `(*LightWindow).stderr` is unused (unused) func (w *LightWindow) stderr(str string) { ^ src/terminal.go:1015:6: func `numLinesMax` is unused (unused) func numLinesMax(str string, max int) int { ^ src/tui/tui.go:167:20: func `ColorPair.is24` is unused (unused) func (p ColorPair) is24() bool { ^ * Address warnings from "gosimple" linter src/options.go:389:83: S1003: should use strings.Contains(str, ",,,") instead (gosimple) if str == "," || strings.HasPrefix(str, ",,") || strings.HasSuffix(str, ",,") || strings.Index(str, ",,,") >= 0 { ^ src/options.go:630:18: S1007: should use raw string (`...`) with regexp.MustCompile to avoid having to escape twice (gosimple) executeRegexp = regexp.MustCompile( ^ src/terminal.go:29:16: S1007: should use raw string (`...`) with regexp.MustCompile to avoid having to escape twice (gosimple) placeholder = regexp.MustCompile("\\\\?(?:{[+sf]*[0-9,-.]*}|{q}|{\\+?f?nf?})") ^ src/terminal_test.go:92:10: S1007: should use raw string (`...`) with regexp.MustCompile to avoid having to escape twice (gosimple) regex = regexp.MustCompile("\\w+") ^ * Address warnings from "staticcheck" linter src/algo/algo.go:374:2: SA4006: this value of `offset32` is never used (staticcheck) offset32, T := alloc32(offset32, slab, N) ^ src/algo/algo.go:456:2: SA4006: this value of `offset16` is never used (staticcheck) offset16, C := alloc16(offset16, slab, width*M) ^ src/tui/tui.go:119:2: SA9004: only the first constant in this group has an explicit type (staticcheck) colUndefined Color = -2 ^
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if str == "," || strings.HasPrefix(str, ",,") || strings.HasSuffix(str, ",,") || strings.Contains(str, ",,,") {
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tokens = append(tokens, ",")
}
chords := make(map[int]string)
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for _, key := range tokens {
if len(key) == 0 {
continue // ignore
}
lkey := strings.ToLower(key)
chord := 0
switch lkey {
case "up":
chord = tui.Up
case "down":
chord = tui.Down
case "left":
chord = tui.Left
case "right":
chord = tui.Right
case "enter", "return":
chord = tui.CtrlM
case "space":
chord = tui.AltZ + int(' ')
case "bspace", "bs":
chord = tui.BSpace
case "ctrl-space":
chord = tui.CtrlSpace
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case "ctrl-^", "ctrl-6":
chord = tui.CtrlCaret
case "ctrl-/", "ctrl-_":
chord = tui.CtrlSlash
case "ctrl-\\":
chord = tui.CtrlBackSlash
case "ctrl-]":
chord = tui.CtrlRightBracket
case "change":
chord = tui.Change
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case "backward-eof":
chord = tui.BackwardEOF
case "alt-enter", "alt-return":
chord = tui.CtrlAltM
case "alt-space":
chord = tui.AltSpace
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case "alt-/":
chord = tui.AltSlash
case "alt-bs", "alt-bspace":
chord = tui.AltBS
case "alt-up":
chord = tui.AltUp
case "alt-down":
chord = tui.AltDown
case "alt-left":
chord = tui.AltLeft
case "alt-right":
chord = tui.AltRight
case "tab":
chord = tui.Tab
case "btab", "shift-tab":
chord = tui.BTab
case "esc":
chord = tui.ESC
case "del":
chord = tui.Del
case "home":
chord = tui.Home
case "end":
chord = tui.End
case "insert":
chord = tui.Insert
case "pgup", "page-up":
chord = tui.PgUp
case "pgdn", "page-down":
chord = tui.PgDn
case "shift-up":
chord = tui.SUp
case "shift-down":
chord = tui.SDown
case "shift-left":
chord = tui.SLeft
case "shift-right":
chord = tui.SRight
case "left-click":
chord = tui.LeftClick
case "right-click":
chord = tui.RightClick
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case "double-click":
chord = tui.DoubleClick
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case "f10":
chord = tui.F10
case "f11":
chord = tui.F11
case "f12":
chord = tui.F12
default:
if len(key) == 10 && strings.HasPrefix(lkey, "ctrl-alt-") && isAlphabet(lkey[9]) {
chord = tui.CtrlAltA + int(lkey[9]) - 'a'
} else if len(key) == 6 && strings.HasPrefix(lkey, "ctrl-") && isAlphabet(lkey[5]) {
chord = tui.CtrlA + int(lkey[5]) - 'a'
} else if len(key) == 5 && strings.HasPrefix(lkey, "alt-") && isAlphabet(lkey[4]) {
chord = tui.AltA + int(lkey[4]) - 'a'
} else if len(key) == 5 && strings.HasPrefix(lkey, "alt-") && isNumeric(lkey[4]) {
chord = tui.Alt0 + int(lkey[4]) - '0'
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} else if len(key) == 2 && strings.HasPrefix(lkey, "f") && key[1] >= '1' && key[1] <= '9' {
chord = tui.F1 + int(key[1]) - '1'
} else if utf8.RuneCountInString(key) == 1 {
chord = tui.AltZ + int([]rune(key)[0])
} else {
errorExit("unsupported key: " + key)
}
}
if chord > 0 {
chords[chord] = key
}
}
return chords
}
func parseTiebreak(str string) []criterion {
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criteria := []criterion{byScore}
hasIndex := false
hasLength := false
hasBegin := false
hasEnd := false
check := func(notExpected *bool, name string) {
if *notExpected {
errorExit("duplicate sort criteria: " + name)
}
if hasIndex {
errorExit("index should be the last criterion")
}
*notExpected = true
}
for _, str := range strings.Split(strings.ToLower(str), ",") {
switch str {
case "index":
check(&hasIndex, "index")
case "length":
check(&hasLength, "length")
criteria = append(criteria, byLength)
case "begin":
check(&hasBegin, "begin")
criteria = append(criteria, byBegin)
case "end":
check(&hasEnd, "end")
criteria = append(criteria, byEnd)
default:
errorExit("invalid sort criterion: " + str)
}
}
return criteria
}
func dupeTheme(theme *tui.ColorTheme) *tui.ColorTheme {
dupe := *theme
return &dupe
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}
func parseTheme(defaultTheme *tui.ColorTheme, str string) *tui.ColorTheme {
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theme := dupeTheme(defaultTheme)
rrggbb := regexp.MustCompile("^#[0-9a-fA-F]{6}$")
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for _, str := range strings.Split(strings.ToLower(str), ",") {
switch str {
case "dark":
theme = dupeTheme(tui.Dark256)
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case "light":
theme = dupeTheme(tui.Light256)
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case "16":
theme = dupeTheme(tui.Default16)
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case "bw", "no":
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theme = tui.NoColorTheme()
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default:
fail := func() {
errorExit("invalid color specification: " + str)
}
// Color is disabled
if theme == nil {
continue
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}
components := strings.Split(str, ":")
if len(components) < 2 {
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fail()
}
cattr := tui.NewColorAttr()
for _, component := range components[1:] {
switch component {
case "regular":
cattr.Attr = tui.AttrRegular
case "bold", "strong":
cattr.Attr |= tui.Bold
case "dim":
cattr.Attr |= tui.Dim
case "italic":
cattr.Attr |= tui.Italic
case "underline":
cattr.Attr |= tui.Underline
case "blink":
cattr.Attr |= tui.Blink
case "reverse":
cattr.Attr |= tui.Reverse
case "":
default:
if rrggbb.MatchString(component) {
cattr.Color = tui.HexToColor(component)
} else {
ansi32, err := strconv.Atoi(component)
if err != nil || ansi32 < -1 || ansi32 > 255 {
fail()
}
cattr.Color = tui.Color(ansi32)
}
}
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}
switch components[0] {
case "input":
theme.Input = cattr
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case "fg":
theme.Fg = cattr
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case "bg":
theme.Bg = cattr
case "preview-fg":
theme.PreviewFg = cattr
case "preview-bg":
theme.PreviewBg = cattr
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case "fg+":
theme.Current = cattr
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case "bg+":
theme.DarkBg = cattr
case "gutter":
theme.Gutter = cattr
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case "hl":
theme.Match = cattr
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case "hl+":
theme.CurrentMatch = cattr
case "border":
theme.Border = cattr
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case "prompt":
theme.Prompt = cattr
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case "spinner":
theme.Spinner = cattr
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case "info":
theme.Info = cattr
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case "pointer":
theme.Cursor = cattr
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case "marker":
theme.Selected = cattr
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case "header":
theme.Header = cattr
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default:
fail()
}
}
}
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return theme
}
var executeRegexp *regexp.Regexp
func firstKey(keymap map[int]string) int {
for k := range keymap {
return k
}
return 0
}
const (
escapedColon = 0
escapedComma = 1
escapedPlus = 2
)
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func init() {
// Backreferences are not supported.
// "~!@#$%^&*;/|".each_char.map { |c| Regexp.escape(c) }.map { |c| "#{c}[^#{c}]*#{c}" }.join('|')
executeRegexp = regexp.MustCompile(
`(?si)[:+](execute(?:-multi|-silent)?|reload|preview):.+|[:+](execute(?:-multi|-silent)?|reload|preview)(\([^)]*\)|\[[^\]]*\]|~[^~]*~|![^!]*!|@[^@]*@|\#[^\#]*\#|\$[^\$]*\$|%[^%]*%|\^[^\^]*\^|&[^&]*&|\*[^\*]*\*|;[^;]*;|/[^/]*/|\|[^\|]*\|)`)
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}
func parseKeymap(keymap map[int][]action, str string) {
masked := executeRegexp.ReplaceAllStringFunc(str, func(src string) string {
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symbol := ":"
if strings.HasPrefix(src, "+") {
symbol = "+"
}
prefix := symbol + "execute"
if strings.HasPrefix(src[1:], "reload") {
prefix = symbol + "reload"
} else if strings.HasPrefix(src[1:], "preview") {
prefix = symbol + "preview"
} else if src[len(prefix)] == '-' {
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c := src[len(prefix)+1]
if c == 's' || c == 'S' {
prefix += "-silent"
} else {
prefix += "-multi"
}
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}
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return prefix + "(" + strings.Repeat(" ", len(src)-len(prefix)-2) + ")"
})
masked = strings.Replace(masked, "::", string([]rune{escapedColon, ':'}), -1)
masked = strings.Replace(masked, ",:", string([]rune{escapedComma, ':'}), -1)
masked = strings.Replace(masked, "+:", string([]rune{escapedPlus, ':'}), -1)
idx := 0
for _, pairStr := range strings.Split(masked, ",") {
origPairStr := str[idx : idx+len(pairStr)]
idx += len(pairStr) + 1
pair := strings.SplitN(pairStr, ":", 2)
if len(pair) < 2 {
errorExit("bind action not specified: " + origPairStr)
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}
var key int
if len(pair[0]) == 1 && pair[0][0] == escapedColon {
key = ':' + tui.AltZ
} else if len(pair[0]) == 1 && pair[0][0] == escapedComma {
key = ',' + tui.AltZ
} else if len(pair[0]) == 1 && pair[0][0] == escapedPlus {
key = '+' + tui.AltZ
} else {
keys := parseKeyChords(pair[0], "key name required")
key = firstKey(keys)
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}
idx2 := len(pair[0]) + 1
specs := strings.Split(pair[1], "+")
actions := make([]action, 0, len(specs))
appendAction := func(types ...actionType) {
actions = append(actions, toActions(types...)...)
}
prevSpec := ""
for specIndex, maskedSpec := range specs {
spec := origPairStr[idx2 : idx2+len(maskedSpec)]
idx2 += len(maskedSpec) + 1
spec = prevSpec + spec
specLower := strings.ToLower(spec)
switch specLower {
case "ignore":
appendAction(actIgnore)
case "beginning-of-line":
appendAction(actBeginningOfLine)
case "abort":
appendAction(actAbort)
case "accept":
appendAction(actAccept)
case "accept-non-empty":
appendAction(actAcceptNonEmpty)
case "print-query":
appendAction(actPrintQuery)
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case "refresh-preview":
appendAction(actRefreshPreview)
case "replace-query":
appendAction(actReplaceQuery)
case "backward-char":
appendAction(actBackwardChar)
case "backward-delete-char":
appendAction(actBackwardDeleteChar)
case "backward-delete-char/eof":
appendAction(actBackwardDeleteCharEOF)
case "backward-word":
appendAction(actBackwardWord)
case "clear-screen":
appendAction(actClearScreen)
case "delete-char":
appendAction(actDeleteChar)
case "delete-char/eof":
appendAction(actDeleteCharEOF)
case "end-of-line":
appendAction(actEndOfLine)
case "cancel":
appendAction(actCancel)
case "clear-query":
appendAction(actClearQuery)
case "clear-selection":
appendAction(actClearSelection)
case "forward-char":
appendAction(actForwardChar)
case "forward-word":
appendAction(actForwardWord)
case "jump":
appendAction(actJump)
case "jump-accept":
appendAction(actJumpAccept)
case "kill-line":
appendAction(actKillLine)
case "kill-word":
appendAction(actKillWord)
case "unix-line-discard", "line-discard":
appendAction(actUnixLineDiscard)
case "unix-word-rubout", "word-rubout":
appendAction(actUnixWordRubout)
case "yank":
appendAction(actYank)
case "backward-kill-word":
appendAction(actBackwardKillWord)
case "toggle-down":
appendAction(actToggle, actDown)
case "toggle-up":
appendAction(actToggle, actUp)
case "toggle-in":
appendAction(actToggleIn)
case "toggle-out":
appendAction(actToggleOut)
case "toggle-all":
appendAction(actToggleAll)
case "select-all":
appendAction(actSelectAll)
case "deselect-all":
appendAction(actDeselectAll)
case "toggle":
appendAction(actToggle)
case "down":
appendAction(actDown)
case "up":
appendAction(actUp)
case "top":
appendAction(actTop)
case "page-up":
appendAction(actPageUp)
case "page-down":
appendAction(actPageDown)
case "half-page-up":
appendAction(actHalfPageUp)
case "half-page-down":
appendAction(actHalfPageDown)
case "previous-history":
appendAction(actPreviousHistory)
case "next-history":
appendAction(actNextHistory)
case "toggle-preview":
appendAction(actTogglePreview)
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case "toggle-preview-wrap":
appendAction(actTogglePreviewWrap)
case "toggle-sort":
appendAction(actToggleSort)
case "preview-up":
appendAction(actPreviewUp)
case "preview-down":
appendAction(actPreviewDown)
case "preview-page-up":
appendAction(actPreviewPageUp)
case "preview-page-down":
appendAction(actPreviewPageDown)
case "preview-half-page-up":
appendAction(actPreviewHalfPageUp)
case "preview-half-page-down":
appendAction(actPreviewHalfPageDown)
default:
t := isExecuteAction(specLower)
if t == actIgnore {
if specIndex == 0 && specLower == "" {
actions = append(keymap[key], actions...)
} else {
errorExit("unknown action: " + spec)
}
} else {
var offset int
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switch t {
case actReload:
offset = len("reload")
case actPreview:
offset = len("preview")
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case actExecuteSilent:
offset = len("execute-silent")
case actExecuteMulti:
offset = len("execute-multi")
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default:
offset = len("execute")
}
if spec[offset] == ':' {
if specIndex == len(specs)-1 {
actions = append(actions, action{t: t, a: spec[offset+1:]})
} else {
prevSpec = spec + "+"
continue
}
} else {
actions = append(actions, action{t: t, a: spec[offset+1 : len(spec)-1]})
}
}
}
prevSpec = ""
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}
keymap[key] = actions
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}
}
func isExecuteAction(str string) actionType {
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matches := executeRegexp.FindAllStringSubmatch(":"+str, -1)
if matches == nil || len(matches) != 1 {
return actIgnore
}
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prefix := matches[0][1]
if len(prefix) == 0 {
prefix = matches[0][2]
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}
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switch prefix {
case "reload":
return actReload
case "preview":
return actPreview
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case "execute":
return actExecute
case "execute-silent":
return actExecuteSilent
case "execute-multi":
return actExecuteMulti
}
return actIgnore
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}
func parseToggleSort(keymap map[int][]action, str string) {
keys := parseKeyChords(str, "key name required")
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if len(keys) != 1 {
errorExit("multiple keys specified")
}
keymap[firstKey(keys)] = toActions(actToggleSort)
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}
func strLines(str string) []string {
return strings.Split(strings.TrimSuffix(str, "\n"), "\n")
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}
func parseSize(str string, maxPercent float64, label string) sizeSpec {
var val float64
percent := strings.HasSuffix(str, "%")
if percent {
val = atof(str[:len(str)-1])
if val < 0 {
errorExit(label + " must be non-negative")
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}
if val > maxPercent {
errorExit(fmt.Sprintf("%s too large (max: %d%%)", label, int(maxPercent)))
}
} else {
if strings.Contains(str, ".") {
errorExit(label + " (without %) must be a non-negative integer")
}
val = float64(atoi(str))
if val < 0 {
errorExit(label + " must be non-negative")
}
}
return sizeSpec{val, percent}
}
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func parseHeight(str string) sizeSpec {
size := parseSize(str, 100, "height")
return size
}
func parseLayout(str string) layoutType {
switch str {
case "default":
return layoutDefault
case "reverse":
return layoutReverse
case "reverse-list":
return layoutReverseList
default:
errorExit("invalid layout (expected: default / reverse / reverse-list)")
}
return layoutDefault
}
func parseInfoStyle(str string) infoStyle {
switch str {
case "default":
return infoDefault
case "inline":
return infoInline
case "hidden":
return infoHidden
default:
errorExit("invalid info style (expected: default / inline / hidden)")
}
return infoDefault
}
func parsePreviewWindow(opts *previewOpts, input string) {
tokens := strings.Split(input, ":")
sizeRegex := regexp.MustCompile("^[0-9]+%?$")
offsetRegex := regexp.MustCompile("^\\+([0-9]+|{-?[0-9]+})(-[0-9]+|-/[1-9][0-9]*)?$")
for _, token := range tokens {
switch token {
case "":
case "default":
*opts = defaultPreviewOpts(opts.command)
case "hidden":
opts.hidden = true
case "nohidden":
opts.hidden = false
case "wrap":
opts.wrap = true
case "nowrap":
opts.wrap = false
case "cycle":
opts.cycle = true
case "nocycle":
opts.cycle = false
case "up", "top":
opts.position = posUp
case "down", "bottom":
opts.position = posDown
case "left":
opts.position = posLeft
case "right":
opts.position = posRight
case "rounded", "border":
opts.border = tui.BorderRounded
case "sharp":
opts.border = tui.BorderSharp
case "noborder":
opts.border = tui.BorderNone
default:
if sizeRegex.MatchString(token) {
opts.size = parseSize(token, 99, "window size")
} else if offsetRegex.MatchString(token) {
opts.scroll = token[1:]
} else {
errorExit("invalid preview window option: " + token)
}
}
}
}
func parseMargin(margin string) [4]sizeSpec {
margins := strings.Split(margin, ",")
checked := func(str string) sizeSpec {
return parseSize(str, 49, "margin")
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}
switch len(margins) {
case 1:
m := checked(margins[0])
return [4]sizeSpec{m, m, m, m}
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case 2:
tb := checked(margins[0])
rl := checked(margins[1])
return [4]sizeSpec{tb, rl, tb, rl}
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case 3:
t := checked(margins[0])
rl := checked(margins[1])
b := checked(margins[2])
return [4]sizeSpec{t, rl, b, rl}
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case 4:
return [4]sizeSpec{
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checked(margins[0]), checked(margins[1]),
checked(margins[2]), checked(margins[3])}
default:
errorExit("invalid margin: " + margin)
}
return defaultMargin()
}
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func parseOptions(opts *Options, allArgs []string) {
var historyMax int
if opts.History == nil {
historyMax = defaultHistoryMax
} else {
historyMax = opts.History.maxSize
}
setHistory := func(path string) {
h, e := NewHistory(path, historyMax)
if e != nil {
errorExit(e.Error())
}
opts.History = h
}
setHistoryMax := func(max int) {
historyMax = max
if historyMax < 1 {
errorExit("history max must be a positive integer")
}
if opts.History != nil {
opts.History.maxSize = historyMax
}
}
validateJumpLabels := false
validatePointer := false
validateMarker := false
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for i := 0; i < len(allArgs); i++ {
arg := allArgs[i]
switch arg {
case "-h", "--help":
help(exitOk)
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case "-x", "--extended":
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opts.Extended = true
case "-e", "--exact":
opts.Fuzzy = false
case "--extended-exact":
// Note that we now don't have --no-extended-exact
opts.Fuzzy = false
opts.Extended = true
case "+x", "--no-extended":
opts.Extended = false
case "+e", "--no-exact":
opts.Fuzzy = true
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case "-q", "--query":
opts.Query = nextString(allArgs, &i, "query string required")
case "-f", "--filter":
filter := nextString(allArgs, &i, "query string required")
opts.Filter = &filter
case "--literal":
opts.Normalize = false
case "--no-literal":
opts.Normalize = true
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case "--algo":
opts.FuzzyAlgo = parseAlgo(nextString(allArgs, &i, "algorithm required (v1|v2)"))
case "--expect":
for k, v := range parseKeyChords(nextString(allArgs, &i, "key names required"), "key names required") {
opts.Expect[k] = v
}
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case "--no-expect":
opts.Expect = make(map[int]string)
case "--no-phony":
opts.Phony = false
case "--phony":
opts.Phony = true
case "--tiebreak":
opts.Criteria = parseTiebreak(nextString(allArgs, &i, "sort criterion required"))
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case "--bind":
parseKeymap(opts.Keymap, nextString(allArgs, &i, "bind expression required"))
case "--color":
_, spec := optionalNextString(allArgs, &i)
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if len(spec) == 0 {
opts.Theme = tui.EmptyTheme()
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} else {
opts.Theme = parseTheme(opts.Theme, spec)
}
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case "--toggle-sort":
parseToggleSort(opts.Keymap, nextString(allArgs, &i, "key name required"))
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case "-d", "--delimiter":
opts.Delimiter = delimiterRegexp(nextString(allArgs, &i, "delimiter required"))
case "-n", "--nth":
opts.Nth = splitNth(nextString(allArgs, &i, "nth expression required"))
case "--with-nth":
opts.WithNth = splitNth(nextString(allArgs, &i, "nth expression required"))
case "-s", "--sort":
opts.Sort = optionalNumeric(allArgs, &i, 1)
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case "+s", "--no-sort":
opts.Sort = 0
case "--tac":
opts.Tac = true
case "--no-tac":
opts.Tac = false
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case "-i":
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opts.Case = CaseIgnore
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case "+i":
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opts.Case = CaseRespect
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case "-m", "--multi":
opts.Multi = optionalNumeric(allArgs, &i, maxMulti)
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case "+m", "--no-multi":
opts.Multi = 0
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case "--ansi":
opts.Ansi = true
case "--no-ansi":
opts.Ansi = false
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case "--no-mouse":
opts.Mouse = false
case "+c", "--no-color":
opts.Theme = tui.NoColorTheme()
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case "+2", "--no-256":
opts.Theme = tui.Default16
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case "--black":
opts.Black = true
case "--no-black":
opts.Black = false
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case "--bold":
opts.Bold = true
case "--no-bold":
opts.Bold = false
case "--layout":
opts.Layout = parseLayout(
nextString(allArgs, &i, "layout required (default / reverse / reverse-list)"))
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case "--reverse":
opts.Layout = layoutReverse
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case "--no-reverse":
opts.Layout = layoutDefault
case "--cycle":
opts.Cycle = true
case "--no-cycle":
opts.Cycle = false
case "--keep-right":
opts.KeepRight = true
case "--no-keep-right":
opts.KeepRight = false
case "--hscroll":
opts.Hscroll = true
case "--no-hscroll":
opts.Hscroll = false
case "--hscroll-off":
opts.HscrollOff = nextInt(allArgs, &i, "hscroll offset required")
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case "--filepath-word":
opts.FileWord = true
case "--no-filepath-word":
opts.FileWord = false
case "--info":
opts.InfoStyle = parseInfoStyle(
nextString(allArgs, &i, "info style required"))
case "--no-info":
opts.InfoStyle = infoHidden
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case "--inline-info":
opts.InfoStyle = infoInline
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case "--no-inline-info":
opts.InfoStyle = infoDefault
case "--jump-labels":
opts.JumpLabels = nextString(allArgs, &i, "label characters required")
validateJumpLabels = true
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case "-1", "--select-1":
opts.Select1 = true
case "+1", "--no-select-1":
opts.Select1 = false
case "-0", "--exit-0":
opts.Exit0 = true
case "+0", "--no-exit-0":
opts.Exit0 = false
case "--read0":
opts.ReadZero = true
case "--no-read0":
opts.ReadZero = false
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case "--print0":
opts.Printer = func(str string) { fmt.Print(str, "\x00") }
opts.PrintSep = "\x00"
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case "--no-print0":
opts.Printer = func(str string) { fmt.Println(str) }
opts.PrintSep = "\n"
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case "--print-query":
opts.PrintQuery = true
case "--no-print-query":
opts.PrintQuery = false
case "--prompt":
opts.Prompt = nextString(allArgs, &i, "prompt string required")
case "--pointer":
opts.Pointer = nextString(allArgs, &i, "pointer sign string required")
validatePointer = true
case "--marker":
opts.Marker = nextString(allArgs, &i, "selected sign string required")
validateMarker = true
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case "--sync":
opts.Sync = true
case "--no-sync":
opts.Sync = false
case "--async":
opts.Sync = false
case "--no-history":
opts.History = nil
case "--history":
setHistory(nextString(allArgs, &i, "history file path required"))
case "--history-size":
setHistoryMax(nextInt(allArgs, &i, "history max size required"))
case "--no-header":
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opts.Header = []string{}
case "--no-header-lines":
opts.HeaderLines = 0
case "--header":
opts.Header = strLines(nextString(allArgs, &i, "header string required"))
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case "--header-lines":
opts.HeaderLines = atoi(
nextString(allArgs, &i, "number of header lines required"))
case "--preview":
opts.Preview.command = nextString(allArgs, &i, "preview command required")
case "--no-preview":
opts.Preview.command = ""
case "--preview-window":
parsePreviewWindow(&opts.Preview,
nextString(allArgs, &i, "preview window layout required: [up|down|left|right][:SIZE[%]][:rounded|sharp|noborder][:wrap][:cycle][:hidden][:+SCROLL[-OFFSET]][:default]"))
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case "--height":
opts.Height = parseHeight(nextString(allArgs, &i, "height required: HEIGHT[%]"))
case "--min-height":
opts.MinHeight = nextInt(allArgs, &i, "height required: HEIGHT")
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case "--no-height":
opts.Height = sizeSpec{}
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case "--no-margin":
opts.Margin = defaultMargin()
case "--no-border":
opts.BorderShape = tui.BorderNone
case "--border":
hasArg, arg := optionalNextString(allArgs, &i)
opts.BorderShape = parseBorder(arg, !hasArg)
case "--no-unicode":
opts.Unicode = false
case "--unicode":
opts.Unicode = true
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case "--margin":
opts.Margin = parseMargin(
nextString(allArgs, &i, "margin required (TRBL / TB,RL / T,RL,B / T,R,B,L)"))
case "--tabstop":
opts.Tabstop = nextInt(allArgs, &i, "tab stop required")
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case "--clear":
opts.ClearOnExit = true
case "--no-clear":
opts.ClearOnExit = false
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case "--version":
opts.Version = true
default:
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if match, value := optString(arg, "--algo="); match {
opts.FuzzyAlgo = parseAlgo(value)
} else if match, value := optString(arg, "-q", "--query="); match {
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opts.Query = value
} else if match, value := optString(arg, "-f", "--filter="); match {
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opts.Filter = &value
} else if match, value := optString(arg, "-d", "--delimiter="); match {
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opts.Delimiter = delimiterRegexp(value)
} else if match, value := optString(arg, "--border="); match {
opts.BorderShape = parseBorder(value, false)
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} else if match, value := optString(arg, "--prompt="); match {
opts.Prompt = value
} else if match, value := optString(arg, "--pointer="); match {
opts.Pointer = value
validatePointer = true
} else if match, value := optString(arg, "--marker="); match {
opts.Marker = value
validateMarker = true
} else if match, value := optString(arg, "-n", "--nth="); match {
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opts.Nth = splitNth(value)
} else if match, value := optString(arg, "--with-nth="); match {
opts.WithNth = splitNth(value)
} else if match, _ := optString(arg, "-s", "--sort="); match {
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opts.Sort = 1 // Don't care
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} else if match, value := optString(arg, "-m", "--multi="); match {
opts.Multi = atoi(value)
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} else if match, value := optString(arg, "--height="); match {
opts.Height = parseHeight(value)
} else if match, value := optString(arg, "--min-height="); match {
opts.MinHeight = atoi(value)
} else if match, value := optString(arg, "--layout="); match {
opts.Layout = parseLayout(value)
} else if match, value := optString(arg, "--info="); match {
opts.InfoStyle = parseInfoStyle(value)
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} else if match, value := optString(arg, "--toggle-sort="); match {
parseToggleSort(opts.Keymap, value)
} else if match, value := optString(arg, "--expect="); match {
for k, v := range parseKeyChords(value, "key names required") {
opts.Expect[k] = v
}
} else if match, value := optString(arg, "--tiebreak="); match {
opts.Criteria = parseTiebreak(value)
} else if match, value := optString(arg, "--color="); match {
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opts.Theme = parseTheme(opts.Theme, value)
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} else if match, value := optString(arg, "--bind="); match {
parseKeymap(opts.Keymap, value)
} else if match, value := optString(arg, "--history="); match {
setHistory(value)
} else if match, value := optString(arg, "--history-size="); match {
setHistoryMax(atoi(value))
} else if match, value := optString(arg, "--header="); match {
opts.Header = strLines(value)
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} else if match, value := optString(arg, "--header-lines="); match {
opts.HeaderLines = atoi(value)
} else if match, value := optString(arg, "--preview="); match {
opts.Preview.command = value
} else if match, value := optString(arg, "--preview-window="); match {
parsePreviewWindow(&opts.Preview, value)
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} else if match, value := optString(arg, "--margin="); match {
opts.Margin = parseMargin(value)
} else if match, value := optString(arg, "--tabstop="); match {
opts.Tabstop = atoi(value)
} else if match, value := optString(arg, "--hscroll-off="); match {
opts.HscrollOff = atoi(value)
} else if match, value := optString(arg, "--jump-labels="); match {
opts.JumpLabels = value
validateJumpLabels = true
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} else {
errorExit("unknown option: " + arg)
}
}
}
if opts.HeaderLines < 0 {
errorExit("header lines must be a non-negative integer")
}
if opts.HscrollOff < 0 {
errorExit("hscroll offset must be a non-negative integer")
}
if opts.Tabstop < 1 {
errorExit("tab stop must be a positive integer")
}
if len(opts.JumpLabels) == 0 {
errorExit("empty jump labels")
}
if validateJumpLabels {
for _, r := range opts.JumpLabels {
if r < 32 || r > 126 {
errorExit("non-ascii jump labels are not allowed")
}
}
}
if validatePointer {
if err := validateSign(opts.Pointer, "pointer"); err != nil {
errorExit(err.Error())
}
}
if validateMarker {
if err := validateSign(opts.Marker, "marker"); err != nil {
errorExit(err.Error())
}
}
}
func validateSign(sign string, signOptName string) error {
if sign == "" {
return fmt.Errorf("%v cannot be empty", signOptName)
}
widthSum := 0
for _, r := range sign {
if !unicode.IsGraphic(r) {
return fmt.Errorf("invalid character in %v", signOptName)
}
widthSum += runewidth.RuneWidth(r)
if widthSum > 2 {
return fmt.Errorf("%v display width should be up to 2", signOptName)
}
}
return nil
}
func postProcessOptions(opts *Options) {
if !tui.IsLightRendererSupported() && opts.Height.size > 0 {
errorExit("--height option is currently not supported on this platform")
}
// Default actions for CTRL-N / CTRL-P when --history is set
if opts.History != nil {
if _, prs := opts.Keymap[tui.CtrlP]; !prs {
opts.Keymap[tui.CtrlP] = toActions(actPreviousHistory)
}
if _, prs := opts.Keymap[tui.CtrlN]; !prs {
opts.Keymap[tui.CtrlN] = toActions(actNextHistory)
}
}
// Extend the default key map
keymap := defaultKeymap()
for key, actions := range opts.Keymap {
for _, act := range actions {
if act.t == actToggleSort {
opts.ToggleSort = true
}
}
keymap[key] = actions
}
opts.Keymap = keymap
// If we're not using extended search mode, --nth option becomes irrelevant
// if it contains the whole range
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if !opts.Extended || len(opts.Nth) == 1 {
for _, r := range opts.Nth {
if r.begin == rangeEllipsis && r.end == rangeEllipsis {
opts.Nth = make([]Range, 0)
return
}
}
}
if opts.Bold {
theme := opts.Theme
boldify := func(c tui.ColorAttr) tui.ColorAttr {
dup := c
if !theme.Colored {
dup.Attr |= tui.Bold
} else if (c.Attr & tui.AttrRegular) == 0 {
dup.Attr |= tui.Bold
}
return dup
}
theme.Current = boldify(theme.Current)
theme.CurrentMatch = boldify(theme.CurrentMatch)
theme.Prompt = boldify(theme.Prompt)
theme.Input = boldify(theme.Input)
theme.Cursor = boldify(theme.Cursor)
theme.Spinner = boldify(theme.Spinner)
}
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}
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// ParseOptions parses command-line options
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func ParseOptions() *Options {
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opts := defaultOptions()
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// Options from Env var
words, _ := shellwords.Parse(os.Getenv("FZF_DEFAULT_OPTS"))
if len(words) > 0 {
parseOptions(opts, words)
}
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// Options from command-line arguments
parseOptions(opts, os.Args[1:])
postProcessOptions(opts)
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return opts
}