Simpler cqlsh installation in base-admin-tools image (#262)

docker/base-images/base-admin-tools.Dockerfile

@@ -2,37 +2,21 @@ ARG BASE_IMAGE=alpine:3.21
 
 FROM ${BASE_IMAGE} AS builder
 
-# Alpine v3.20 comes with Python 3.12. But cqlsh won't work with Python 3.12 until the following issue is resolved.
-# https://issues.apache.org/jira/browse/CASSANDRA-19206
-# Compiling Python 3.11.9 from source and installing it on the side. Then creating a venv using that python version.
-# Revert this change once the issue mentioned above is resolved.
+# These are necessary to install cqlsh
 RUN apk add --update --no-cache \
+    python3-dev \
     musl-dev \
-    libffi-dev \
+    libev-dev \
     gcc \
-    make \
-    zlib-dev \
-    openssl-dev
-
-RUN mkdir -p /opt/python/3.11.9 ; \
-    cd /opt/python/3.11.9/ ; \
-    wget https://www.python.org/ftp/python/3.11.9/Python-3.11.9.tgz -P . ; \
-    tar zxvf Python-3.11.9.tgz ; \
-    cd Python-3.11.9 ; \
-    ./configure --prefix=/opt/python/3.11.9; \
-    make ; \
-    make install ; \
-    make clean ; \
-    cd .. ; \
-    rm -rf Python-3.11.9*
-
-RUN cd /opt/python/3.11.9/bin ; ./python3 -m venv /opt/venv
-ENV PATH="/opt/venv/bin:$PATH"
-RUN pip3 install cqlsh
+    pipx
+
+RUN pipx install --global cqlsh
 
 FROM ${BASE_IMAGE} AS base-admin-tools
 
 RUN apk add --update --no-cache \
+    python3 \
+    libev \
     ca-certificates \
     tzdata \
     bash \
@@ -41,16 +25,13 @@ RUN apk add --update --no-cache \
     yq \
     mysql-client \
     postgresql-client \
-    py3-pip \
     expat \
     tini
 
-COPY --from=builder /opt/python/3.11.9 /opt/python/3.11.9
-COPY --from=builder /opt/venv /opt/venv
-
-ENV PATH="/opt/venv/bin:$PATH"
+COPY --from=builder /opt/pipx/venvs/cqlsh /opt/pipx/venvs/cqlsh
+RUN ln -s /opt/pipx/venvs/cqlsh/bin/cqlsh /usr/local/bin/cqlsh
 
-# validate installation
+# validate cqlsh installation
 RUN cqlsh --version
 
 SHELL ["/bin/bash", "-c"]