Port all conda recipes to rattler-build & use strict channel priority

ci/build_cpp.sh

@@ -4,8 +4,6 @@
 
 set -euo pipefail
 
-./ci/rapids-configure-conda-channels
-
 source rapids-configure-sccache
 
 source rapids-date-string
@@ -28,10 +26,24 @@ sccache --start-server
 # ref: https://github.com/rapidsai/cucim/issues/800#issuecomment-2529593457
 conda config --set path_conflict warn
 
-RAPIDS_PACKAGE_VERSION=$(rapids-generate-version) rapids-conda-retry build \
-    conda/recipes/libcucim
+RAPIDS_PACKAGE_VERSION=$(rapids-generate-version)
+export RAPIDS_PACKAGE_VERSION
+echo "${RAPIDS_PACKAGE_VERSION}" > ./VERSION
+
+# populates `RATTLER_CHANNELS` array and `RATTLER_ARGS` array
+source rapids-rattler-channel-string
+
+rapids-logger "Building libcucim"
+
+# --no-build-id allows for caching with `sccache`
+# more info is available at
+# https://rattler.build/latest/tips_and_tricks/#using-sccache-or-ccache-with-rattler-build
+rattler-build build --recipe conda/recipes/libcucim \
+                    "${RATTLER_ARGS[@]}" \
+                    "${RATTLER_CHANNELS[@]}"
 
 sccache --show-adv-stats
 
-RAPIDS_PACKAGE_NAME="$(rapids-artifact-name conda_cpp libcucim cucim --cuda "$RAPIDS_CUDA_VERSION")"
-export RAPIDS_PACKAGE_NAME
+# remove build_cache directory to avoid uploading the entire source tree
+# tracked in https://github.com/prefix-dev/rattler-build/issues/1424
+rm -rf "$RAPIDS_CONDA_BLD_OUTPUT_DIR"/build_cache

ci/build_python.sh

@@ -4,8 +4,6 @@
 
 set -euo pipefail
 
-./ci/rapids-configure-conda-channels
-
 source rapids-configure-sccache
 
 source rapids-date-string
@@ -14,7 +12,9 @@ export CMAKE_GENERATOR=Ninja
 
 rapids-print-env
 
-rapids-generate-version > ./VERSION
+RAPIDS_PACKAGE_VERSION="$(rapids-generate-version)"
+export RAPIDS_PACKAGE_VERSION
+echo "${RAPIDS_PACKAGE_VERSION}" > ./VERSION
 
 rapids-logger "Begin py build"
 
@@ -30,14 +30,25 @@ sccache --start-server
 # ref: https://github.com/rapidsai/cucim/issues/800#issuecomment-2529593457
 conda config --set path_conflict warn
 
-CPP_CHANNEL=$(rapids-download-from-github "$(rapids-artifact-name conda_cpp libcucim cucim --cuda "$RAPIDS_CUDA_VERSION")")
+# populates `RATTLER_CHANNELS` array and `RATTLER_ARGS` array
+source rapids-rattler-channel-string
 
-# TODO: Remove `--no-test` flag once importing on a CPU
-# node works correctly
-RAPIDS_PACKAGE_VERSION=$(head -1 ./VERSION) rapids-conda-retry build \
-  --no-test \
-  --channel "${CPP_CHANNEL}" \
-  conda/recipes/cucim
+# Add C++ cached packages to rattler-build's channels
+CPP_CHANNEL=$(rapids-download-from-github "$(rapids-artifact-name conda_cpp libcucim cucim --cuda "$RAPIDS_CUDA_VERSION")")
+rapids-logger "Prepending channel ${CPP_CHANNEL} to RATTLER_CHANNELS"
+RATTLER_CHANNELS=("--channel" "${CPP_CHANNEL}" "${RATTLER_CHANNELS[@]}")
+
+rapids-logger "Building cucim"
+
+# TODO: remove `--test skip` when importing on a CPU node works correctly
+# --no-build-id allows for caching with `sccache`
+# more info is available at
+# https://rattler.build/latest/tips_and_tricks/#using-sccache-or-ccache-with-rattler-build
+rattler-build build --recipe conda/recipes/cucim \
+                    --experimental \
+                    --test skip \
+                    "${RATTLER_ARGS[@]}" \
+                    "${RATTLER_CHANNELS[@]}"
 
 sccache --show-adv-stats
 

conda/recipes/cucim/recipe.yaml

@@ -0,0 +1,120 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025-2026, NVIDIA CORPORATION.
+# SPDX-License-Identifier: Apache-2.0
+
+schema_version: 1
+
+context:
+  version: ${{ env.get("RAPIDS_PACKAGE_VERSION") }}
+  minor_version: ${{ (version | split("."))[:2] | join(".") }}
+  cuda_version: ${{ (env.get("RAPIDS_CUDA_VERSION") | split("."))[:2] | join(".") }}
+  cuda_major: '${{ (env.get("RAPIDS_CUDA_VERSION") | split("."))[0] }}'
+  date_string: '${{ env.get("RAPIDS_DATE_STRING") }}'
+  py_version: ${{ env.get("RAPIDS_PY_VERSION") }}
+  py_buildstring: ${{ py_version | version_to_buildstring }}
+  head_rev: ${{ git.head_rev(".")[:8] }}
+  linux64: ${{ linux and x86_64 }}
+
+package:
+  name: cucim
+  version: ${{ version }}
+
+source:
+  path: ../../..
+
+build:
+  string: cuda${{ cuda_major }}_py${{ py_buildstring }}_${{ date_string }}_gh${{ head_rev }}_h${{ hash }}
+  dynamic_linking:
+    overlinking_behavior: error
+  prefix_detection:
+    ignore:
+      - lib/libcucim.so
+      - lib/libcucim.so.*
+      - lib/cucim.*.so
+  script:
+    content: |
+      CUCIM_BUILD_TYPE=${CUCIM_BUILD_TYPE:-release}
+      LD_LIBRARY_PATH=${LD_LIBRARY_PATH:-}
+
+      set -euo pipefail
+
+      # CUDA needs to include $PREFIX/include as system include path
+      export CUDAFLAGS="-isystem $BUILD_PREFIX/include -isystem $PREFIX/include "
+      export LD_LIBRARY_PATH="$BUILD_PREFIX/lib:$PREFIX/lib:$LD_LIBRARY_PATH"
+
+      ./run build_local cucim "${CUCIM_BUILD_TYPE}"
+
+      cp -P python/install/lib/* python/cucim/src/cucim/clara/
+
+      pushd python/cucim
+
+      python -m pip install --config-settings rapidsai.disable-cuda=true . -vv
+
+      popd
+    secrets:
+      - AWS_ACCESS_KEY_ID
+      - AWS_SECRET_ACCESS_KEY
+      - AWS_SESSION_TOKEN
+    env:
+      CMAKE_C_COMPILER_LAUNCHER: ${{ env.get("CMAKE_C_COMPILER_LAUNCHER") }}
+      CMAKE_CUDA_COMPILER_LAUNCHER: ${{ env.get("CMAKE_CUDA_COMPILER_LAUNCHER") }}
+      CMAKE_CXX_COMPILER_LAUNCHER: ${{ env.get("CMAKE_CXX_COMPILER_LAUNCHER") }}
+      CMAKE_GENERATOR: ${{ env.get("CMAKE_GENERATOR") }}
+      SCCACHE_BUCKET: ${{ env.get("SCCACHE_BUCKET") }}
+      SCCACHE_IDLE_TIMEOUT: ${{ env.get("SCCACHE_IDLE_TIMEOUT") }}
+      SCCACHE_REGION: ${{ env.get("SCCACHE_REGION") }}
+      SCCACHE_S3_USE_SSL: ${{ env.get("SCCACHE_S3_USE_SSL") }}
+      SCCACHE_S3_NO_CREDENTIALS: ${{ env.get("SCCACHE_S3_NO_CREDENTIALS") }}
+      SCCACHE_S3_KEY_PREFIX: cucim/${{ env.get("RAPIDS_CONDA_ARCH") }}/cuda${{ cuda_major }}
+
+requirements:
+  build:
+    - ${{ compiler("c") }}
+    - ${{ compiler("cuda") }}
+    - ${{ compiler("cxx") }}
+    - ${{ stdlib("c") }}
+    - cmake ${{ cmake_version }}
+    - cuda-version =${{ cuda_version }}
+    - make
+    - ninja
+  host:
+    - click
+    - cuda-cudart-dev
+    - cuda-version =${{ cuda_version }}
+    - cupy >=13.6.0,!=14.0.0,!=14.1.0
+    - libcucim =${{ version }}
+    - pip
+    - python =${{ py_version }}
+    - python-gil
+    - rapids-build-backend >=0.4.0,<0.5.0.dev0
+    - scikit-image >=0.23.2,<0.27.0a0
+    - scipy >=1.6
+    - setuptools >=80.9.0
+  run:
+    - ${{ pin_compatible("cuda-version", upper_bound="x", lower_bound="x") }}
+    - click
+    - cuda-cudart
+    - cupy >=13.6.0,!=14.0.0,!=14.1.0
+    - lazy_loader >=0.1
+    - libcucim =${{ version }}
+    - numpy >=1.23,<3.0a0
+    - python
+    - python-gil
+    - scikit-image >=0.23.2,<0.27.0a0
+    - scipy >=1.6
+  run_constraints:
+    - openslide-python >=1.3.0
+  ignore_run_exports:
+    by_name:
+      - cuda-cudart
+      - cuda-version
+
+tests:
+  - python:
+      imports:
+        - cucim
+      pip_check: False
+
+about:
+  homepage: ${{ load_from_file("python/cucim/pyproject.toml").project.urls.Homepage }}
+  license: ${{ load_from_file("python/cucim/pyproject.toml").project.license.text }}
+  summary: ${{ load_from_file("python/cucim/pyproject.toml").project.description }}