build b3sum binaries in CI for new tags

These configs and code are adapted from the CI workflow in
https://github.com/oconnor663/blake3-py, especially the
upload_github_release_asset.py script, which is copied verbatim.

1 files changed, 37 insertions, 0 deletions

diff --git a/.github/workflows/build_b3sum.py b/.github/workflows/build_b3sum.py
new file mode 100644
index 0000000..e487daf
--- /dev/null
+++ b/.github/workflows/build_b3sum.py
@@ -0,0 +1,37 @@
+#! /usr/bin/env python3
+
+from pathlib import Path
+import platform
+import shutil
+import subprocess
+import sys
+
+ROOT = Path(__file__).parent.parent.parent
+RUST_TARGET = sys.argv[1]
+
+subprocess.run(["cargo", "build", "--target", sys.argv[1], "--release"],
+               cwd=ROOT / "b3sum")
+
+if platform.system() == "Windows":
+    original_exe_name = "b3sum.exe"
+else:
+    original_exe_name = "b3sum"
+
+if platform.system() == "Windows":
+    new_exe_name = "b3sum_windows_x64_bin.exe"
+elif platform.system() == "Darwin":
+    new_exe_name = "b3sum_macos_x64_bin"
+elif platform.system() == "Linux":
+    new_exe_name = "b3sum_linux_x64_bin"
+else:
+    raise RuntimeError("Unexpected platform: " + platform.system())
+
+# Copy the built binary so that it has the upload name we want.
+out_dir = ROOT / "b3sum/target" / RUST_TARGET / "release"
+original_exe_path = str(out_dir / original_exe_name)
+new_exe_path = str(out_dir / new_exe_name)
+print("copying", repr(original_exe_path), "to", repr(new_exe_path))
+shutil.copyfile(original_exe_path, new_exe_path)
+
+# This lets the subsequent upload step get the filepath.
+print("::set-output name=bin_path::" + new_exe_path)