Adds help messaging via flag lib
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parent
3972b3914e
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38
main.go
38
main.go
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@ -2,6 +2,7 @@ package main
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import (
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"bufio"
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"flag"
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"fmt"
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"os"
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"os/signal"
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@ -179,15 +180,30 @@ func handleSignals(c <-chan os.Signal) {
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}
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}
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func main() {
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// watch for signals, send them to be handled
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c := make(chan os.Signal, 1)
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signal.Notify(c, syscall.SIGTSTP, syscall.SIGCONT, syscall.SIGINT)
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go handleSignals(c)
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func printHelp() {
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header := `tally - spreadsheets
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args := os.Args
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if len(args) > 1 {
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path := ExpandedAbsFilepath(args[1])
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Syntax: tally [filepath]
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Examples: tally
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tally -h
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tally ./my-tally-spreadsheet.tss
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tally ./my-cool-csv.csv
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tally ./my-cool-tsv.tsv
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filepath should be a path to a file that already exists. To create a new file, simply run tally with no arguments and then save the file however you like.
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`
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_, _ = fmt.Fprintf(os.Stdout, header)
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flag.PrintDefaults()
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}
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func main() {
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flag.Usage = printHelp
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flag.Parse()
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args := flag.Args()
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if len(args) > 0 {
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path := ExpandedAbsFilepath(args[0])
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ext := strings.ToLower(filepath.Ext(path))
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switch ext {
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case ".tss":
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@ -204,5 +220,11 @@ func main() {
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} else {
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wb = makeWorkbook("blank.tss")
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}
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// watch for signals, send them to be handled
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c := make(chan os.Signal, 1)
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signal.Notify(c, syscall.SIGTSTP, syscall.SIGCONT, syscall.SIGINT)
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go handleSignals(c)
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wb.Run()
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}
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