Build release -vs- local sources

This commit closes #5

./docker/build.sh                    # build local sources
./docker/build.sh -r 0.1.0 -p  # build known release

Dockerfile

@@ -1,16 +0,0 @@
-FROM caddy:2.8.4-builder-alpine AS builder
-
-COPY pkg/gitea/* /module/gitea-pages/pkg/gitea/
-COPY gitea-pages.go go.mod go.sum /module/gitea-pages/
-
-RUN xcaddy build \
-    --with gitea.djmil.dev/djmil/gitea-pages \
-    --replace gitea.djmil.dev/djmil/gitea-pages=/module/gitea-pages \
-    --replace gitea.djmil.dev/djmil/gitea-pages/pkg/gitea=/module/gitea-pages/pkg/gitea
-
-FROM caddy:2.8.4
-
-COPY --from=builder /usr/bin/caddy /usr/bin/caddy
-COPY Caddyfile /etc/caddy/Caddyfile 
-
-EXPOSE 3003/tcp

docker/build.sh

@@ -0,0 +1,98 @@
+#!/bin/bash
+set -e
+
+usage="$(basename "$0") [--release=<version>] [--publish] [-h] 
+
+Compile Caddy server with gitea-pages plugin inside docker container. Buy 
+default local sources will be used for build.
+
+You can also compile known release. The given release tag will be fetched from
+the project git repo at https://gitea.djmil.dev/djmil/gitea-pages.
+
+Optionally, the script can be used to publish resulting docker image to the
+https://hub.docker.com/repository/docker/djmil/gitea-pages.
+
+Params for the short options version shall be separated by space. For the long
+options - equal sign shall be used. Example:
+    --release=0.1.0
+    -r 0.0.1
+
+Where:
+    -l | --local
+        Build local sources. Default behaviour.
+
+    -r | --release  <version>
+        A major.minor.patch tag of the known release to build.
+
+    -p | --publish
+        Publish resulting image to the docker hub. Typically shall be used 
+        together with --release option. 
+
+    -h | --help
+        Show this message and exit.
+"
+
+R="\033[0;31m" # RED
+G="\033[0;32m" # GREEN
+Y="\033[0;33m" # YELLOW
+B="\033[1;34m" # BLUE
+NC="\033[0;0m" # NO COLOR
+
+###############################################################################
+# Parse long and short options, source:    https://stackoverflow.com/a/28466267
+
+# Defaults
+tag='local'
+publish=false
+
+die() { echo "$*" >&2; exit 2; }       # complain to STDERR and exit with error
+needs_arg() { if [ -z "$OPTARG" ]; then die "No arg for --$OPT option"; fi; }
+
+while getopts r:lph-: OPT; do  # allow -a, -b with arg, -c, and -- "with arg"
+  # support long options:       https://stackoverflow.com/a/28466267/519360
+  if [ "$OPT" = "-" ]; then     # long option: reformulate OPT and OPTARG
+    OPT="${OPTARG%%=*}"         # extract long option name
+    OPTARG="${OPTARG#"$OPT"}"   # extract long option argument (may be empty)
+    OPTARG="${OPTARG#=}"        # if long option argument, remove assigning `=`
+  fi
+  case "$OPT" in
+    l | local )    tag='local' ;;
+    r | release )  needs_arg; tag="$OPTARG" ;;
+    p | publish )  publish=true ;;
+    h | help )     echo "$usage" >&2; exit 0 ;;
+    \? )           exit 2 ;;    # bad short option (error reported via getopts)
+    * )            die "Illegal option --$OPT" ;;             # bad long option
+  esac
+done
+shift $((OPTIND-1))               # remove parsed options and args from $@ list
+###############################################################################
+
+
+if [ $tag = 'local' ]; then
+    echo -e "${Y} -->> Local dev-mode build: compile local sources${NC}";
+    
+    docker build \
+        --file docker/local.dockerfile \
+        --tag djmil/gitea-pages:local \
+        .
+    
+    exit 0
+fi
+
+
+echo -e "${Y} -->> Building release ${B}'$tag'${NC}";
+
+docker build \
+    --file docker/release.dockerfile \
+    --build-arg RELEASE=$tag \
+    --tag djmil/gitea-pages:$tag \
+    .
+
+
+if publish; then
+    echo -e "${Y} -->> Publishing to the dockerhub";
+
+    docker login --username djmil --password-stdin
+
+    docker push djmil/gitea-pages:$tag
+fi

docker/local.dockerfile

@@ -0,0 +1,24 @@
+FROM caddy:2.8.4-builder-alpine AS builder
+
+#
+# mount root of the build context as /module/gitea-pages  
+#    inside the container and run `xcaddy build` command
+#    also use cache to speed up subsequent builds
+#
+# $> go env GOCACHE     <<-- Golang build cache
+# $> go env GOMODCACHE  <<-- Goland module download cache
+#
+RUN --mount=type=bind,target=/module/gitea-pages \
+    --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg/mod \
+    xcaddy build \
+        --with gitea.djmil.dev/djmil/gitea-pages \
+        --replace gitea.djmil.dev/djmil/gitea-pages=/module/gitea-pages \
+        --replace gitea.djmil.dev/djmil/gitea-pages/pkg/gitea=/module/gitea-pages/pkg/gitea
+
+FROM caddy:2.8.4
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+COPY Caddyfile /etc/caddy/Caddyfile 
+
+EXPOSE 3003/tcp

docker/release.dockerfile

@@ -0,0 +1,19 @@
+FROM caddy:2.8.4-builder-alpine AS builder
+
+ARG RELEASE
+
+#
+# $> go env GOCACHE     <<-- Golang build cache
+# $> go env GOMODCACHE  <<-- Goland module download cache
+#
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg/mod \
+    xcaddy build \
+        --with gitea.djmil.dev/djmil/gitea-pages@$RELEASE 
+
+FROM caddy:2.8.4
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+COPY Caddyfile /etc/caddy/Caddyfile 
+
+EXPOSE 3003/tcp

make-release.sh

@@ -1,39 +0,0 @@
-#!/bin/bash
-set -e
-
-usage="$(basename "$0") [-h] [-t RELEASE_VERSION ]
-
-The script compiles Caddy server with GiteaPages plugin, and publishes the resulting image 
-to the https://hub.docker.com/u/djmil
-
-Where:
-    -t  RELEASE_VERSION
-        A major.minor.patch tag for the image being publisdhed.
-"
-
-tag=''
-
-while getopts ht: flag 
-do
-    case "${flag}" in
-        t) tag=${OPTARG};;
-        h) echo "$usage"; exit 0;;
-        *) echo "$usage" >&2; exit 1;;
-    esac
-done
-
-if [ ! "$tag" ]; then
-        echo 'Missing: -t RELEASE_VERSION' >&2
-        exit 1
-fi
-
-echo "Tag: $tag";
-
-docker build --tag djmil/gitea-pages:$tag .
-
-#git tag
-#git push tag
-
-docker login --username djmil #--password-stdin
-
-docker push djmil/gitea-pages:$tag