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fix: Python host builder base image version #2965

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Merged
knative-prow merged 1 commit into from
Aug 4, 2025
Merged

fix: Python host builder base image version #2965

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13 changes: 12 additions & 1 deletion pkg/oci/python_builder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ import (
"os/exec"
slashpath "path"
"path/filepath"
"regexp"

v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/tarball"
Expand All @@ -23,7 +24,17 @@ func (b pythonBuilder) Base(customBase string) string {
if customBase != "" {
return customBase
}
return defaultPythonBase
cmd := exec.Command("python", "-V")
out, err := cmd.CombinedOutput()
if err != nil {
return defaultPythonBase
}
re := regexp.MustCompile(`Python (\d+\.\d+)\.\d+`)
subMatches := re.FindSubmatch(out)
if len(subMatches) != 2 {
return defaultPythonBase
}
return fmt.Sprintf("python:%s-slim", subMatches[1])
}

// Configure gives the python builder a chance to mutate the final
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