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package main
import (
"bufio"
"flag"
"fmt"
"io/ioutil"
"os"
"regexp"
"strings"
"text/tabwriter"
)
type queue []string
func (q *queue) insert(s string) {
}
func printWithContext(all []string, ind, ctxlen int) {
var slice []string
slice = append(slice, "\""+all[ind]+"\"")
if len(all[:ind]) < ctxlen {
slice = append(all[:ind], slice...)
} else {
slice = append(all[ind-ctxlen:ind], slice...)
}
if len(all[ind:]) < ctxlen {
slice = append(slice, all[ind+1:]...)
} else {
slice = append(slice, all[ind+1:ind+ctxlen]...)
}
fstr := strings.Join(slice, "\t")
fmt.Fprintf(tw, "%s\n", fstr)
}
var tw *tabwriter.Writer
func main() {
flag.Parse()
kw := flag.Arg(0)
if len(kw) == 0 {
fmt.Printf("Need string to search for. Exiting...\n")
os.Exit(1)
}
tw = tabwriter.NewWriter(os.Stdout, 1, 2, 1, ' ', 0)
reader := bufio.NewReader(os.Stdin)
all, err := ioutil.ReadAll(reader)
if err != nil {
fmt.Printf("Could not read everything because there was an error: %q. Exiting\n", err)
os.Exit(1)
}
splitreg := regexp.MustCompile("[ \t\n]")
splline := splitreg.Split(string(all), -1)
for i, w := range splline {
index := strings.Index(w, kw)
if index < 0 {
continue
}
printWithContext(splline, i, 5)
}
tw.Flush()
}
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