Use r25b as default for now

rules.bzl

@@ -55,7 +55,7 @@ def _android_ndk_repository_impl(ctx):
 
     if ndk_platform == "linux":
         clang_directory = "toolchains/llvm/prebuilt/linux-x86_64"
-    elif ndk_platform == "darwin:
+    elif ndk_platform == "darwin":
         # Note: darwin-x86_64 does indeed contain fat binaries with arm64 slices, too.
         clang_directory = "toolchains/llvm/prebuilt/darwin-x86_64"
     elif ndk_platform == "windows":
@@ -65,8 +65,6 @@ def _android_ndk_repository_impl(ctx):
 
     sysroot_directory = "%s/sysroot" % clang_directory
 
-    api_level = ctx.attr.api_level or 31
-
     result = ctx.execute([clang_directory + "/bin/clang", "--print-resource-dir"])
     if result.return_code != 0:
         fail("Failed to execute clang: %s" % result.stderr)
@@ -116,9 +114,8 @@ def _android_ndk_repository_impl(ctx):
 
 _android_ndk_repository = repository_rule(
     attrs = {
-        "path": attr.string(),
-        "api_level": attr.int(),
-        "version": attr.string(default = "r25c"),
+        "api_level": attr.int(default = 31),
+        "version": attr.string(default = "r25b"),
         "base_url": attr.string(default = "https://dl.google.com/android/repository"),
         "sha256s": attr.string_dict(),
     },

sha256sums.bzl

@@ -11,6 +11,10 @@ _NDK_PACKAGE_SHA256SUMS = {
     "android-ndk-r25c-windows.zip": "f70093964f6cbbe19268f9876a20f92d3a593db3ad2037baadd25fd8d71e84e2",
     "android-ndk-r25c-darwin.zip": "b01bae969a5d0bfa0da18469f650a1628dc388672f30e0ba231da5c74245bc92",
     "android-ndk-r25c-linux.zip": "769ee342ea75f80619d985c2da990c48b3d8eaf45f48783a2d48870d04b46108",
+    # r25b
+    "android-ndk-r25b-windows.zip": "c9a72beda4663ab714c9fb3dc06bb9b9f124f2b5199957c86cd6f57eb59fd49a",
+    "android-ndk-r25b-darwin.zip": "7e12f1f809878d4f5d5a901809277aa31546d36c10730fade2036d7d95b3607a",
+    "android-ndk-r25b-linux.zip": "403ac3e3020dd0db63a848dcaba6ceb2603bf64de90949d5c4361f848e44b005",
 }
 
 def ndk_sha256(filename, repository_ctx):

utils/checksums.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Download a specific release of the NDK for all three platforms and calculate SHA256 checksums
+# to add to the sha256sums.bzl file.
+set -eu
+
+ndk_version=$1
+
+cd "$(mktemp -d)"
+echo "Working in $PWD"
+
+curl -LO "https://dl.google.com/android/repository/android-ndk-${ndk_version}-windows.zip"
+curl -LO "https://dl.google.com/android/repository/android-ndk-${ndk_version}-darwin.zip"
+curl -LO "https://dl.google.com/android/repository/android-ndk-${ndk_version}-linux.zip"
+sha256sum ./*