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|
package fzf
import (
"fmt"
"os"
"regexp"
"strings"
"github.com/junegunn/go-shellwords"
)
const usage = `usage: fzf [options]
Search
-x, --extended Extended-search mode
-e, --extended-exact Extended-search mode (exact match)
-i Case-insensitive match (default: smart-case match)
+i Case-sensitive match
-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 item using index expressions for search
-d, --delimiter=STR Field delimiter regex for --nth (default: AWK-style)
Search result
-s, --sort Sort the result
+s, --no-sort Do not sort the result. Keep the sequence unchanged.
Interface
-m, --multi Enable multi-select with tab/shift-tab
--no-mouse Disable mouse
+c, --no-color Disable colors
+2, --no-256 Disable 256-color
--black Use black background
--reverse Reverse orientation
--prompt=STR Input prompt (default: '> ')
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.
--print-query Print query as the first line
--sync Synchronous search for multi-staged filtering
(e.g. 'fzf --multi | fzf --sync')
Environment variables
FZF_DEFAULT_COMMAND Default command to use when input is tty
FZF_DEFAULT_OPTS Defaults options. (e.g. '-x -m')
`
// Mode denotes the current search mode
type Mode int
// Search modes
const (
ModeFuzzy Mode = iota
ModeExtended
ModeExtendedExact
)
// Case denotes case-sensitivity of search
type Case int
// Case-sensitivities
const (
CaseSmart Case = iota
CaseIgnore
CaseRespect
)
// Options stores the values of command-line options
type Options struct {
Mode Mode
Case Case
Nth []Range
WithNth []Range
Delimiter *regexp.Regexp
Sort int
Multi bool
Mouse bool
Color bool
Color256 bool
Black bool
Reverse bool
Prompt string
Query string
Select1 bool
Exit0 bool
Filter *string
PrintQuery bool
Sync bool
Version bool
}
func defaultOptions() *Options {
return &Options{
Mode: ModeFuzzy,
Case: CaseSmart,
Nth: make([]Range, 0),
WithNth: make([]Range, 0),
Delimiter: nil,
Sort: 1000,
Multi: false,
Mouse: true,
Color: true,
Color256: strings.Contains(os.Getenv("TERM"), "256"),
Black: false,
Reverse: false,
Prompt: "> ",
Query: "",
Select1: false,
Exit0: false,
Filter: nil,
PrintQuery: false,
Sync: false,
Version: false}
}
func help(ok int) {
os.Stderr.WriteString(usage)
os.Exit(ok)
}
func errorExit(msg string) {
os.Stderr.WriteString(msg + "\n")
help(1)
}
func optString(arg string, prefix string) (bool, string) {
rx, _ := regexp.Compile(fmt.Sprintf("^(?:%s)(.*)$", prefix))
matches := rx.FindStringSubmatch(arg)
if len(matches) > 1 {
return true, matches[1]
}
return false, ""
}
func nextString(args []string, i *int, message string) string {
if len(args) > *i+1 {
*i++
} else {
errorExit(message)
}
return args[*i]
}
func optionalNumeric(args []string, i *int) int {
if len(args) > *i+1 {
if strings.IndexAny(args[*i+1], "0123456789") == 0 {
*i++
}
}
return 1 // Don't care
}
func splitNth(str string) []Range {
if match, _ := regexp.MatchString("^[0-9,-.]+$", 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) *regexp.Regexp {
rx, e := regexp.Compile(str)
if e != nil {
str = regexp.QuoteMeta(str)
}
rx, e = regexp.Compile(fmt.Sprintf("(?:.*?%s)|(?:.+?$)", str))
if e != nil {
errorExit("invalid regular expression: " + e.Error())
}
return rx
}
func parseOptions(opts *Options, allArgs []string) {
for i := 0; i < len(allArgs); i++ {
arg := allArgs[i]
switch arg {
case "-h", "--help":
help(0)
case "-x", "--extended":
opts.Mode = ModeExtended
case "-e", "--extended-exact":
opts.Mode = ModeExtendedExact
case "+x", "--no-extended", "+e", "--no-extended-exact":
opts.Mode = ModeFuzzy
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 "-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)
case "+s", "--no-sort":
opts.Sort = 0
case "-i":
opts.Case = CaseIgnore
case "+i":
opts.Case = CaseRespect
case "-m", "--multi":
opts.Multi = true
case "+m", "--no-multi":
opts.Multi = false
case "--no-mouse":
opts.Mouse = false
case "+c", "--no-color":
opts.Color = false
case "+2", "--no-256":
opts.Color256 = false
case "--black":
opts.Black = true
case "--no-black":
opts.Black = false
case "--reverse":
opts.Reverse = true
case "--no-reverse":
opts.Reverse = false
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 "--print-query":
opts.PrintQuery = true
case "--no-print-query":
opts.PrintQuery = false
case "--prompt":
opts.Prompt = nextString(allArgs, &i, "prompt string required")
case "--sync":
opts.Sync = true
case "--no-sync":
opts.Sync = false
case "--async":
opts.Sync = false
case "--version":
opts.Version = true
default:
if match, value := optString(arg, "-q|--query="); match {
opts.Query = value
} else if match, value := optString(arg, "-f|--filter="); match {
opts.Filter = &value
} else if match, value := optString(arg, "-d|--delimiter="); match {
opts.Delimiter = delimiterRegexp(value)
} else if match, value := optString(arg, "--prompt="); match {
opts.Prompt = value
} else if match, value := optString(arg, "-n|--nth="); match {
|
