func main() {
var g regexp.Grep
g.AddFlags()
g.Stdout = os.Stdout
g.Stderr = os.Stderr
flag.Usage = usage
flag.Parse()
args := flag.Args()
if len(args) == 0 {
flag.Usage()
}
if *cpuProfile != "" {
f, err := os.Create(*cpuProfile)
if err != nil {
log.Fatal(err)
}
defer f.Close()
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
pat := "(?m)" + args[0]
if *iflag {
pat = "(?i)" + pat
}
re, err := regexp.Compile(pat)
if err != nil {
log.Fatal(err)
}
g.Regexp = re
if len(args) == 1 {
g.Reader(os.Stdin, "<standard input>")
} else {
for _, arg := range args[1:] {
g.File(arg)
}
}
if !g.Match {
os.Exit(1)
}
}
func searchPattern(idx *index.Index, pattern string, options *SearchOptions, w flushWriter) ([]*SearchResult, error) {
var results []*SearchResult
var stdout, stderr bytes.Buffer
bStdout := bufio.NewWriter(&stdout)
bStderr := bufio.NewWriter(&stderr)
grep := regexp.Grep{
Stdout: bStdout,
Stderr: bStderr,
N: true,
}
// grep.AddFlags()
re, err := regexp.Compile(pattern)
if err != nil {
return nil, err
}
grep.Regexp = re
q := index.RegexpQuery(re.Syntax)
var post []uint32
post = idx.PostingQuery(q)
w.Write([]byte("\"results\": [\n"))
// This is needed to check whether we need to print a "," to respect JSON
// syntax
isFirst := true
for _, fileid := range post {
name := idx.Name(fileid)
grep.File(name)
bStdout.Flush()
bStderr.Flush()
for {
line, err := stdout.ReadString('\n')
if err == io.EOF {
break
} else if err != nil {
log.Printf("Error from ReadString: %s", err.Error())
return nil, err
}
// log.Printf("LINE: %s", line)
fields := strings.SplitN(line, ":", 3)
ln, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
log.Printf("Error converting line number: %s", err.Error())
return nil, err
}
sr := &SearchResult{
Filename: fields[0],
Line: ln,
Match: html.EscapeString(fields[2]),
}
results = append(results, sr)
jr, err := json.Marshal(sr)
if err != nil {
log.Printf("JSON error: %s", err.Error())
return nil, err
}
if !isFirst {
w.Write([]byte(",\n"))
} else {
isFirst = false
}
w.Write(jr)
}
}
w.Write([]byte("]\n"))
return results, nil
}