add docker setup for S3 to WebDav proxy

.dockerignore

@@ -0,0 +1,5 @@
+.idea
+bin
+contrib
+rclone
+graphics

Dockerfile

@@ -1,24 +1,48 @@
 FROM golang AS builder
 
-COPY . /go/src/github.com/rclone/rclone/
-WORKDIR /go/src/github.com/rclone/rclone/
+WORKDIR /rclone/
+COPY go.mod /rclone/
+RUN go mod download
+
+COPY . /rclone/
 
 RUN \
   CGO_ENABLED=0 \
-  make
-RUN ./rclone version
+  make && \
+  ./rclone version
+
 
 # Begin final image
 FROM alpine:latest
 
-RUN apk --no-cache add ca-certificates fuse3 tzdata && \
-  echo "user_allow_other" >> /etc/fuse.conf
+COPY --from=builder /rclone/rclone /usr/local/bin/
 
-COPY --from=builder /go/src/github.com/rclone/rclone/rclone /usr/local/bin/
+COPY ["./docker/startup", "/startup"]
 
-RUN addgroup -g 1009 rclone && adduser -u 1009 -Ds /bin/sh -G rclone rclone
+RUN apk --no-cache add \
+  ca-certificates \
+  fuse3 \
+  tzdata \
+  && apk cache clean
 
-ENTRYPOINT [ "rclone" ]
+RUN echo "user_allow_other" >> /etc/fuse.conf && \
+  addgroup -g 1009 rclone && \
+  adduser -u 1009 -Ds /bin/sh -G rclone rclone && \
+  chmod +x /startup
 
 WORKDIR /data
+
 ENV XDG_CONFIG_HOME=/config
+
+# remote configs
+ENV REMOTE_NAME=""
+ENV REMOTE_URL=""
+ENV REMOTE_VENDOR=""
+
+# s3 proxy configs
+# a space separated list of options
+ENV PROXY_ARGS=""
+
+ENTRYPOINT [ "/startup" ]
+
+EXPOSE 8080

docker/startup

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+RCLONE_CONFIG=/config/rclone/rclone.conf
+
+if [ -z "$REMOTE_NAME" ]; then
+    echo "REMOTE_NAME is not set"
+    exit 1
+fi
+if [ -z "$REMOTE_URL" ]; then
+    echo "REMOTE_URL is not set"
+    exit 1
+fi
+if [ -z "$REMOTE_VENDOR" ]; then
+    echo "REMOTE_VENDOR is not set"
+    exit 1
+fi
+
+mkdir -p "$(dirname "$RCLONE_CONFIG")"
+
+cat <<EOF >"$RCLONE_CONFIG"
+[$REMOTE_NAME]
+type = webdav
+url = $REMOTE_URL
+vendor = $REMOTE_VENDOR
+nextcloud_chunk_size = 0
+EOF
+
+# parse args
+ifsBak=$IFS
+IFS=' '
+
+ARGS="$REMOTE_NAME:"
+for arg in $PROXY_ARGS; do
+    ARGS="$ARGS $arg"
+done
+
+IFS=$ifsBak
+
+# DO NOT QUOTE ARGS
+rclone serve s3 ${ARGS}