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helpers.go
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/
helpers.go
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package helpers
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
)
func loadFromFile(path string) (string, error) {
data, err := ioutil.ReadFile(path)
if err != nil {
return "", fmt.Errorf("Failed to read file: %v", err)
}
return string(data), nil
}
func loadFromStdin(testStdin io.Reader) (string, error) {
var stdin io.Reader = os.Stdin
if testStdin != nil {
stdin = testStdin
}
var b bytes.Buffer
if _, err := io.Copy(&b, stdin); err != nil {
return "", fmt.Errorf("Failed to read stdin: %v", err)
}
return b.String(), nil
}
func LoadDataSource(data string, testStdin io.Reader) (string, error) {
// Handle empty quoted shell parameters
if len(data) == 0 {
return "", nil
}
switch data[0] {
case '@':
return loadFromFile(data[1:])
case '-':
if len(data) > 1 {
return data, nil
}
return loadFromStdin(testStdin)
default:
return data, nil
}
}
func LoadDataSourceNoRaw(data string, testStdin io.Reader) (string, error) {
if len(data) == 0 {
return "", fmt.Errorf("Failed to load data: must specify a file path or '-' for stdin")
}
if data == "-" {
return loadFromStdin(testStdin)
}
return loadFromFile(data)
}