40 lines
725 B
Go
40 lines
725 B
Go
package parser
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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"os/exec"
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)
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func ParseFile(path string) (Parser, error) {
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if path == "" {
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return Parser{}, errors.New("path cannot be empty")
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}
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if _, err := os.Stat(path); os.IsNotExist(err) {
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return Parser{}, fmt.Errorf("file does not exist: %s", path)
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}
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cmd := exec.Command("tail", "-F", "-n", "10", path)
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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return Parser{}, fmt.Errorf("stdout pipe error: %w", err)
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}
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if err := cmd.Start(); err != nil {
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return Parser{}, fmt.Errorf("failed to start tail parser: %w", err)
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}
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p := Parser{
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parser: bufio.NewScanner(stdout),
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ch: make(chan string, 100),
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cmd: cmd,
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file: &path,
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}
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return p, nil
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}
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