bitbake: bitbake: Add piping compression library

Adds a library that implements file-like objects (similar to
gzip.GzipFile) that can stream to arbitrary compression programs. This
is utilized to implement a LZ4 and zstd compression API.

(Bitbake rev: 61c3acd058ea018696bd284b3922d0b458838d05)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/bitbake/lib/bb/compress/lz4.py b/bitbake/lib/bb/compress/lz4.py
new file mode 100644
index 0000000000..0f6bc51a5b
--- /dev/null
+++ b/bitbake/lib/bb/compress/lz4.py
@@ -0,0 +1,17 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import bb.compress._pipecompress
+
+
+def open(*args, **kwargs):
+    return bb.compress._pipecompress.open_wrap(LZ4File, *args, **kwargs)
+
+
+class LZ4File(bb.compress._pipecompress.PipeFile):
+    def get_compress(self):
+        return ["lz4c", "-z", "-c"]
+
+    def get_decompress(self):
+        return ["lz4c", "-d", "-c"]