ref: a546059a9c0b4541f6c9e292f2bb065c1b6115d9
dir: /markup/internal/external.go/
package internal
import (
"bytes"
"os/exec"
"strings"
"github.com/gohugoio/hugo/markup/converter"
)
func ExternallyRenderContent(
cfg converter.ProviderConfig,
ctx converter.DocumentContext,
content []byte, path string, args []string) []byte {
logger := cfg.Logger
cmd := exec.Command(path, args...)
cmd.Stdin = bytes.NewReader(content)
var out, cmderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &cmderr
err := cmd.Run()
// Most external helpers exit w/ non-zero exit code only if severe, i.e.
// halting errors occurred. -> log stderr output regardless of state of err
for _, item := range strings.Split(cmderr.String(), "\n") {
item := strings.TrimSpace(item)
if item != "" {
logger.Errorf("%s: %s", ctx.DocumentName, item)
}
}
if err != nil {
logger.Errorf("%s rendering %s: %v", path, ctx.DocumentName, err)
}
return normalizeExternalHelperLineFeeds(out.Bytes())
}
// Strips carriage returns from third-party / external processes (useful for Windows)
func normalizeExternalHelperLineFeeds(content []byte) []byte {
return bytes.Replace(content, []byte("\r"), []byte(""), -1)
}
func GetPythonExecPath() string {
path, err := exec.LookPath("python")
if err != nil {
path, err = exec.LookPath("python.exe")
if err != nil {
return ""
}
}
return path
}