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Improve evaluation result display in console
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "unicode" | ||
|
|
||
| "github.com/fatih/color" | ||
| "github.com/m-mizutani/goast" | ||
| "github.com/m-mizutani/goerr" | ||
| ) | ||
|
|
||
| func outputFailAsText(w io.Writer, fail *goast.Fail) error { | ||
| code, err := getLine(fail.Path, fail.Line) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| type fprintf func(w io.Writer, format string, a ...any) (n int, err error) | ||
|
|
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| underLine := make([]rune, len(code)) | ||
| for i, c := range code { | ||
| if i+1 < fail.Column { | ||
| switch { | ||
| case unicode.IsSpace(c): | ||
| underLine[i] = c | ||
| case i+1 < fail.Column: | ||
| underLine[i] = ' ' | ||
| } | ||
| } else { | ||
| underLine[i] = '~' | ||
| } | ||
| } | ||
|
|
||
| var cFprintf fprintf = fmt.Fprintf | ||
| if w == os.Stdout { | ||
| cFprintf = color.New(color.FgRed).Fprintf | ||
| } | ||
|
|
||
| fmt.Fprintf(w, "[%s:%d] - ", fail.Path, fail.Line) | ||
| cFprintf(w, "%s\n", fail.Msg) | ||
| fmt.Fprintf(w, "\n%s\n%s\n\n", code, string(underLine)) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func getLine(path string, line int) (string, error) { | ||
| fd, err := os.Open(path) | ||
| if err != nil { | ||
| return "", goerr.Wrap(err) | ||
| } | ||
| defer func() { | ||
| if err := fd.Close(); err != nil { | ||
| logger.Warn(err.Error()) | ||
| } | ||
| }() | ||
|
|
||
| var idx int | ||
| scanner := bufio.NewScanner(fd) | ||
| for scanner.Scan() { | ||
| idx++ | ||
| if idx == line { | ||
| return scanner.Text(), nil | ||
| } | ||
| } | ||
|
|
||
| return "", nil | ||
| } |
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