build: fix make release-docker (#918)

PR
- https://github.com/zrepl/zrepl/pull/913

didn't update the `release-docker` flow to use `uv`, thereby breaking
it.

## Changes

- Create `.uv-version` file to centralize UV version between Dockerfile
and CircleCI
- Update build container to use `uv`

While at it, make life with the build container better:
- Create `zrepl_build` user in the build container as same UID/GID as
the caller of `make release-docker`
- Allow Ctrl-C to cancel `make release-docker` in interactive shells

.circleci/config.yml

@@ -16,14 +16,19 @@ commands:
               echo "$line" >> $BASH_ENV
             fi
 
-  # NOTE: when updating uv version, update both the install URL and cache keys below
+  # NOTE: UV version is defined in .uv-version file at repository root
   install-docdep:
     steps:
+      - run:
+          name: Read UV version from .uv-version
+          command: |
+            UV_VERSION=$(cat .uv-version)
+            echo "export UV_VERSION=$UV_VERSION" >> $BASH_ENV
       # Python is managed by uv - it will automatically download the version
       # specified in docs/.python-version when needed
       - run:
           name: Install uv
-          command: curl -LsSf https://astral.sh/uv/0.9.30/install.sh | sh
+          command: curl -LsSf https://astral.sh/uv/${UV_VERSION}/install.sh | sh
       - run:
           name: Add uv to PATH and set cache dir
           command: |
@@ -32,8 +37,8 @@ commands:
       - restore_cache:
           name: Restore uv cache
           keys:
-            - uv-cache-v1-0.9.30-{{ checksum "docs/uv.lock" }}
-            - uv-cache-v1-0.9.30-
+            - uv-cache-v1-${UV_VERSION}-{{ checksum "docs/uv.lock" }}
+            - uv-cache-v1-${UV_VERSION}-
 
   save-uv-cache:
     steps:
@@ -42,7 +47,7 @@ commands:
           command: uv cache prune --ci
       - save_cache:
           name: Save uv cache
-          key: uv-cache-v1-0.9.30-{{ checksum "docs/uv.lock" }}
+          key: uv-cache-v1-${UV_VERSION}-{{ checksum "docs/uv.lock" }}
           paths:
             - ~/.cache/uv
 

.uv-version

@@ -0,0 +1 @@
+0.9.30

Makefile

@@ -42,7 +42,7 @@ endif
 
 
 ifneq ($(RELEASE_DOCKER_CACHEMOUNT),)
-	_RELEASE_DOCKER_CACHEMOUNT := -v $(RELEASE_DOCKER_CACHEMOUNT)/mod:/go/pkg/mod -v $(RELEASE_DOCKER_CACHEMOUNT)/xdg-cache:/root/.cache/go-build
+	_RELEASE_DOCKER_CACHEMOUNT := -v $(RELEASE_DOCKER_CACHEMOUNT)/mod:/go/pkg/mod -v $(RELEASE_DOCKER_CACHEMOUNT)/xdg-cache:/.cache/go-build
 .PHONY: release-docker-mkcachemount
 release-docker-mkcachemount:
 	mkdir -p $(RELEASE_DOCKER_CACHEMOUNT)
@@ -71,10 +71,13 @@ release: ensure-release-toolchain
 
 release-docker: $(ARTIFACTDIR) release-docker-mkcachemount
 	sed 's/FROM.*!SUBSTITUTED_BY_MAKEFILE/FROM $(RELEASE_DOCKER_BASEIMAGE)/' build/build.Dockerfile > $(ARTIFACTDIR)/build.Dockerfile
-	docker build -t zrepl_release --pull -f $(ARTIFACTDIR)/build.Dockerfile .
-	docker run --rm -i \
+	docker build -t zrepl_release --pull \
+		--build-arg BUILD_UID=$$(id -u) \
+		--build-arg BUILD_GID=$$(id -g) \
+		-f $(ARTIFACTDIR)/build.Dockerfile .
+	docker run --rm -i$$(test -t 0 && echo t) \
 		$(_RELEASE_DOCKER_CACHEMOUNT) \
-		-v $(CURDIR):/src -u $$(id -u):$$(id -g) \
+		-v $(CURDIR):/src \
 		zrepl_release \
 		make release \
 			GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) \

build/build.Dockerfile

@@ -1,22 +1,30 @@
 FROM !SUBSTITUTED_BY_MAKEFILE
 
-RUN apt-get update && apt-get install -y \
-    python3-pip \
-    python3-venv \
-    unzip \
-    gawk
+ARG BUILD_UID=1000
+ARG BUILD_GID=1000
 
-# setup venv for docs
-ENV VIRTUAL_ENV=/opt/venv
-RUN python3 -m venv $VIRTUAL_ENV
-ENV PATH="$VIRTUAL_ENV/bin:$PATH"
-ADD docs/requirements.txt /tmp/requirements.txt
-RUN pip3 install -r /tmp/requirements.txt
+RUN apt-get update && apt-get install -y \
+    python3 \
+    unzip \
+    gawk \
+    curl
+
+# Create build user with the host's UID/GID before installing uv
+RUN groupadd -g ${BUILD_GID} zrepl_build && \
+    useradd -u ${BUILD_UID} -g ${BUILD_GID} -m zrepl_build
 
 # Go toolchain uses xdg-cache
 RUN mkdir -p /.cache && chmod -R 0777 /.cache
 
+# Install uv as the build user - version from .uv-version file
+ADD .uv-version /tmp/.uv-version
+USER zrepl_build
+RUN UV_VERSION=$(cat /tmp/.uv-version) && \
+    curl -LsSf https://astral.sh/uv/${UV_VERSION}/install.sh | sh
+
 # Go devtools are managed by Makefile
 
 WORKDIR /src
+ENV PATH="/home/zrepl_build/.local/bin:$PATH" \
+    GOCACHE="/.cache/go-build"