feat: Automatically split STDIN on null characters on push #70
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package command | ||
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| import ( | ||
| "io" | ||
| "strings" | ||
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| "github.com/gotify/cli/v2/utils" | ||
| ) | ||
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| func readMessage(args []string, r io.Reader, output chan<- string, split *rune) { | ||
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| msgArgs := strings.Join(args, " ") | ||
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| if msgArgs != "" { | ||
| if utils.ProbeStdin(r) { | ||
| utils.Exit1With("message is set via arguments and stdin, use only one of them") | ||
| } | ||
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| output <- msgArgs | ||
| close(output) | ||
| return | ||
| } | ||
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| var buf strings.Builder | ||
| for { | ||
| var tmp [256]byte | ||
| n, err := r.Read(tmp[:]) | ||
| if err != nil { | ||
| if err.Error() == "EOF" { | ||
| break | ||
| } | ||
| utils.Exit1With(err) | ||
| } | ||
| tmpStr := string(tmp[:n]) | ||
| if split != nil { | ||
| // split the message on the null character | ||
| parts := strings.Split(tmpStr, string(*split)) | ||
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| if len(parts) == 1 { | ||
| buf.WriteString(parts[0]) | ||
| continue | ||
| } | ||
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| previous := buf.String() | ||
| // fuse previous with parts[0], send parts[1] .. parts[n-2] and set parts[n-1] as new previous | ||
| firstMsg := previous + parts[0] | ||
| output <- firstMsg | ||
| for _, part := range parts[1 : len(parts)-1] { | ||
| output <- part | ||
| } | ||
| buf.Reset() | ||
| buf.WriteString(parts[len(parts)-1]) | ||
| } else { | ||
| buf.WriteString(tmpStr) | ||
| } | ||
| } | ||
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| if buf.Len() > 0 { | ||
| output <- buf.String() | ||
| } | ||
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| close(output) | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| package command | ||
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| import ( | ||
| "strings" | ||
| "testing" | ||
| ) | ||
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| // Polyfill for slices.Equal for Go 1.20 | ||
| func slicesEqual[T comparable](a, b []T) bool { | ||
| if len(a) != len(b) { | ||
| return false | ||
| } | ||
| for i, v := range a { | ||
| if v != b[i] { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
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| func readChanAll[T any](c chan T) []T { | ||
| var res []T | ||
| for s := range c { | ||
| res = append(res, s) | ||
| } | ||
| return res | ||
| } | ||
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| func TestReadMessage(t *testing.T) { | ||
| var split rune = '\x00' | ||
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| // Test case 1: message set via arguments | ||
| output := make(chan string) | ||
| go readMessage([]string{"Hello", "World"}, nil, output, nil) | ||
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| if res := readChanAll(output); !(slicesEqual(res, []string{"Hello World"})) { | ||
| t.Errorf("Expected %v, but got %v", []string{"Hello World"}, res) | ||
| } | ||
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| // Test case 2: message set via arguments should not split on 'split' character | ||
| output = make(chan string) | ||
| go readMessage([]string{"Hello\x00World"}, nil, output, &split) | ||
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| if res := readChanAll(output); !(slicesEqual(res, []string{"Hello\x00World"})) { | ||
| t.Errorf("Expected %v, but got %v", []string{"Hello\x00World"}, res) | ||
| } | ||
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| // Test case 3: message set via stdin | ||
| output = make(chan string) | ||
| go readMessage([]string{}, strings.NewReader("Hello\x00World"), output, &split) | ||
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| if res := readChanAll(output); !(slicesEqual(res, []string{"Hello", "World"})) { | ||
| t.Errorf("Expected %v, but got %v", []string{"Hello", "World"}, res) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,22 +1,23 @@ | ||
| package utils | ||
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| import ( | ||
| "io" | ||
| "os" | ||
| ) | ||
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| func ProbeStdin(file io.Reader) bool { | ||
| if file == nil { | ||
| return false | ||
| } | ||
| if file, ok := file.(*os.File); ok { | ||
| fi, err := file.Stat() | ||
| if err != nil { | ||
| return false | ||
| } | ||
| if fi.Mode()&os.ModeNamedPipe == 0 && !fi.Mode().IsRegular() { | ||
| return false | ||
| } | ||
| } | ||
|
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| return true | ||
| } |
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How would I use this feature to simplify the journalctl call in #69?
I'm also not 100% sure about the actual use-case of feature, is there something not possible with the current cli feature set and xargs? I don't find the argument that we don't have to use xargs very strong for implementing this inside gotify/cli.
I think if someone doesn't have access to xargs then they probably don't use gotify/cli and instead use some "raw" http call.
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makes sense, maybe I will just cherry pick the formatting bugs to a different PR and do that