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fragment
This is a program to print a fragment of a file. It takes a filename,
a starting line (lines are numbered starting at 1) and an optional
end line or offset. It has one flag, `-nl`, which causes line numbers
not to be printed.
For example, compare the output to `nl -ba fragment.go`:
$ fragment fragment.go 23 +6
23: func main() {
24: flag.Parse()
25:
26: if flag.NArg() < 2 || flag.NArg() > 3 {
27: usage()
28: os.Exit(1)
29: }
$ fragment fragment.go 25 30
25:
26: if flag.NArg() < 2 || flag.NArg() > 3 {
27: usage()
28: os.Exit(1)
29: }
30:
$ fragment fragment.go 80
80
80: if n > end {
81: return true
82: }
83: return false
84: }
85:
86: fmt.Println(start)
87: fmtStr += "\n"
88: for i := start; !endFunc(i); i++ {
89: fmt.Printf(fmtStr, i, lines[i])
90: }
91: }
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