Add Alpine Linux R Dockerfile

Author: thisisnic

ci/docker/alpine-linux-3.22-r.dockerfile

@@ -0,0 +1,65 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# Minimal Alpine Linux container with R for testing Arrow R package
+# on musl libc (CRAN runs checks on Alpine Linux 3.22)
+# Replicates CRAN's Alpine environment as closely as possible
+
+ARG arch=amd64
+FROM ${arch}/alpine:3.22
+
+# Install R and essential build tools
+# Keep minimal to match CRAN's setup (no bash - CRAN uses BusyBox)
+RUN apk add \
+        R \
+        R-dev \
+        R-doc \
+        cmake \
+        curl-dev \
+        g++ \
+        gcc \
+        git \
+        make \
+        musl-locales \
+        openssl-dev \
+        pkgconfig \
+        re2-dev \
+        zlib-dev && \
+    rm -rf /var/cache/apk/* && \
+    ln -s /usr/share/zoneinfo/Etc/UTC /etc/localtime && \
+    echo "Etc/UTC" > /etc/timezone
+
+# Set locale and timezone
+ENV LANG=C.UTF-8 \
+    LC_COLLATE=C \
+    MUSL_LOCPATH=/usr/share/i18n/locales/musl
+
+# Set CRAN repo
+RUN echo 'options(repos = c(CRAN = "https://cran.rstudio.com"))' >> /usr/lib/R/etc/Rprofile.site
+
+# Install pak for package management (following rhub pattern)
+RUN R -q -e 'install.packages("pak", repos = sprintf("https://r-lib.github.io/p/pak/%s/%s/%s/%s", "devel", .Platform$pkgType, R.Version()$os, R.Version()$arch))'
+
+# Enable automatic system requirements installation
+ENV PKG_SYSREQS=true \
+    R_PKG_SYSREQS2=true
+
+# Set up parallel compilation
+RUN echo "MAKEFLAGS=-j$(R -s -e 'cat(parallel::detectCores())')" >> /usr/lib/R/etc/Renviron.site
+
+# Verify R works and this is musl
+RUN R --version && ldd --version 2>&1 | grep -q musl