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|
package git
import (
"bytes"
"regexp"
)
var (
lfsOIDRe = regexp.MustCompile(`(?m)^oid sha256:[0-9a-f]{64}$`)
lfsSizeRe = regexp.MustCompile(`(?m)^size [0-9]+$`)
)
// IsLFSPointer checks to see if a blob is an LFS pointer.
// TODO: this is incomplete as it does not recognize pre-release version of LFS blobs with
// the "https://hawser.github.com/spec/v1" version. For compatibility with the Ruby RPC, we
// leave this as-is for now though.
func IsLFSPointer(b []byte) bool {
// ensure the version exists
if !bytes.HasPrefix(b, []byte("version https://git-lfs.github.com/spec")) {
return false
}
// ensure the oid exists
if !lfsOIDRe.Match(b) {
return false
}
// ensure the size exists
if !lfsSizeRe.Match(b) {
return false
}
return true
}
|
