ci: use the runner's uid/gid

Use the runner's uid/gid for the containers for sanity when sharing
files across volumes.

.github/workflows/main.yml

@@ -69,7 +69,7 @@ jobs:
         if [ "${{ matrix.container.base }}" != "" ]; then
           BASE_ARG="--build-arg BASE=${{ matrix.container.base }}"
         fi
-        docker build -t ${{ env.docker-registry-container-sha }} ${BASE_ARG} -f ${{ env.dockerfile }} .
+        docker build -t ${{ env.docker-registry-container-sha }} --build-arg UID=$(id -u) --build-arg GID=$(id -g) ${BASE_ARG} -f ${{ env.dockerfile }} .
         docker tag ${{ env.docker-registry-container-sha }} ${{ env.docker-registry-container-latest }}
         docker push ${{ env.docker-registry-container-sha }}
         docker push ${{ env.docker-registry-container-latest }}

ci/docker/bionic

@@ -38,7 +38,12 @@ RUN cd /tmp && \
     rm -rf mbedtls-2.16.2
 
 FROM mbedtls AS adduser
-RUN useradd --shell /bin/bash libgit2 --create-home
+ARG UID=""
+ARG GID=""
+RUN if [ "${UID}" != "" ]; then USER_ARG="--uid ${UID}"; fi && \
+    if [ "${GID}" != "" ]; then GROUP_ARG="--gid ${GID}"; fi && \
+    groupadd ${GROUP_ARG} libgit2 && \
+    useradd ${USER_ARG} --gid libgit2 --shell /bin/bash --create-home libgit2
 
 FROM adduser AS configure
 RUN mkdir /var/run/sshd

ci/docker/centos7

@@ -48,7 +48,12 @@ RUN cd /tmp && \
     rm -rf cmake-3.21.1
 
 FROM cmake AS adduser
-RUN useradd --shell /bin/bash libgit2 --create-home
+ARG UID=""
+ARG GID=""
+RUN if [ "${UID}" != "" ]; then USER_ARG="--uid ${UID}"; fi && \
+    if [ "${GID}" != "" ]; then GROUP_ARG="--gid ${GID}"; fi && \
+    groupadd ${GROUP_ARG} libgit2 && \
+    useradd ${USER_ARG} --gid libgit2 --shell /bin/bash --create-home libgit2
 
 FROM adduser AS configure
 ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig

ci/docker/centos8

@@ -40,7 +40,12 @@ RUN cd /tmp && \
     rm -rf valgrind-3.15.0
 
 FROM valgrind AS adduser
-RUN useradd --shell /bin/bash libgit2 --create-home
+ARG UID=""
+ARG GID=""
+RUN if [ "${UID}" != "" ]; then USER_ARG="--uid ${UID}"; fi && \
+    if [ "${GID}" != "" ]; then GROUP_ARG="--gid ${GID}"; fi && \
+    groupadd ${GROUP_ARG} libgit2 && \
+    useradd ${USER_ARG} --gid libgit2 --shell /bin/bash --create-home libgit2
 
 FROM adduser AS configure
 ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig

ci/docker/focal

@@ -73,7 +73,13 @@ RUN cd /tmp && \
     rm -rf valgrind-3.15.0
 
 FROM valgrind AS adduser
-RUN useradd --shell /bin/bash libgit2 --create-home
+ARG UID=""
+ARG GID=""
+RUN if [ "${UID}" != "" ]; then USER_ARG="--uid ${UID}"; fi && \
+    if [ "${GID}" != "" ]; then GROUP_ARG="--gid ${GID}"; fi && \
+    groupadd ${GROUP_ARG} libgit2 && \
+    useradd ${USER_ARG} --gid libgit2 --shell /bin/bash --create-home libgit2
+
 
 FROM adduser AS configure
 RUN mkdir /var/run/sshd

ci/docker/xenial

@@ -60,7 +60,13 @@ RUN cd /tmp && \
     rm -rf valgrind-3.15.0
 
 FROM valgrind AS adduser
-RUN useradd --shell /bin/bash libgit2 --create-home
+ARG UID=""
+ARG GID=""
+RUN if [ "${UID}" != "" ]; then USER_ARG="--uid ${UID}"; fi && \
+    if [ "${GID}" != "" ]; then GROUP_ARG="--gid ${GID}"; fi && \
+    groupadd ${GROUP_ARG} libgit2 && \
+    useradd ${USER_ARG} --gid libgit2 --shell /bin/bash --create-home libgit2
+
 
 FROM adduser AS configure
 RUN mkdir /var/run/sshd