diff options
| -rw-r--r-- | src/buildstream/_cas/cascache.py | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/buildstream/_cas/cascache.py b/src/buildstream/_cas/cascache.py index 2fa143084..b875eecdd 100644 --- a/src/buildstream/_cas/cascache.py +++ b/src/buildstream/_cas/cascache.py @@ -272,6 +272,22 @@ class CASCache: def objpath(self, digest): return os.path.join(self.casdir, "objects", digest.hash[:2], digest.hash[2:]) + # open(): + # + # Open file read-only by CAS digest and return a corresponding file object. + # + # Args: + # digest (Digest): The digest of the object + # mode (str): An optional string that specifies the mode in which the file is opened. + # + def open(self, digest, mode="r"): + if mode not in ["r", "rb"]: + raise ValueError("Unsupported mode: `{}`".format(mode)) + + objpath = self.objpath(digest) + + return open(objpath, mode=mode) + # add_object(): # # Hash and write object to CAS. |