server-scripts/caddy_docker_custom_user/builder/builder.sh

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#!/bin/sh
VERSION=${VERSION:-"1.0.3"}
TELEMETRY=${ENABLE_TELEMETRY:-"true"}
IMPORT="github.com/caddyserver/caddy"
# version <1.0.1 needs to use old import path
new_import=true
if [ "$(echo $VERSION | cut -c1)" -eq 0 ] 2>/dev/null || [ "$VERSION" = "1.0.0" ]; then
IMPORT="github.com/mholt/caddy" && new_import=false
fi
# add `v` prefix for version numbers
[ "$(echo $VERSION | cut -c1)" -ge 0 ] 2>/dev/null && VERSION="v$VERSION"
stage() {
STAGE="$1"
echo
echo starting stage: $STAGE
}
end_stage() {
if [ $? -ne 0 ]; then
>&2 echo error at \'$STAGE\'
exit 1
fi
echo finished stage: $STAGE
echo
}
use_new_import() (
cd $1
find . -name '*.go' | while read -r f; do
sed -i.bak 's/\/mholt\/caddy/\/caddyserver\/caddy/g' $f && rm $f.bak
done
)
get_package() {
# go module require special dns handling
if $go_mod && [ -f /dnsproviders/$1/$1.go ]; then
mkdir -p /caddy/dnsproviders/$1
cp -r /dnsproviders/$1/$1.go /caddy/dnsproviders/$1/$1.go
echo "caddy/dnsproviders/$1"
else
GO111MODULE=off GOOS=linux GOARCH=amd64 caddyplug package $1 2> /dev/null
fi
}
dns_plugins() {
git clone https://github.com/caddyserver/dnsproviders /dnsproviders
# temp hack for repo rename
if $new_import; then use_new_import /dnsproviders; fi
}
plugins() {
mkdir -p /plugins
for plugin in $(echo $PLUGINS | tr "," " "); do \
import_package=$(get_package $plugin)
$go_mod || go get -v "$import_package" ; # not needed for modules
$go_mod && package="main" || package="caddyhttp"
printf "package $package\nimport _ \"$import_package\"" > \
/plugins/$plugin.go ; \
done
}
module() {
mkdir -p /caddy
cd /caddy # build dir
# setup module
go mod init caddy
go get -v $IMPORT@$VERSION
# plugins
cp -r /plugins/. .
# temp hack for repo rename
go get -v -d # download possible plugin deps
if $new_import; then use_new_import /go/pkg/mod; fi
# main and telemetry
cat > main.go <<EOF
package main
import "$IMPORT/caddy/caddymain"
import "os"
func main() {
switch os.Getenv("ENABLE_TELEMETRY") {
case "0", "false":
caddymain.EnableTelemetry = false
case "1", "true":
caddymain.EnableTelemetry = true
default:
caddymain.EnableTelemetry = $TELEMETRY
}
caddymain.Run()
}
EOF
}
legacy() {
cd /go/src/$IMPORT/caddy # build dir
# plugins
cp -r /plugins/. ../caddyhttp
# telemetry
run_file="/go/src/$IMPORT/caddy/caddymain/run.go"
if [ "$TELEMETRY" = "false" ]; then
cat > "$run_file.disablestats.go" <<EOF
package caddymain
import "os"
func init() {
switch os.Getenv("ENABLE_TELEMETRY") {
case "0", "false":
EnableTelemetry = false
case "1", "true":
EnableTelemetry = true
default:
EnableTelemetry = false
}
}
EOF
fi
}
# caddy source
stage "fetching caddy source"
git clone https://github.com/caddyserver/caddy -b "$VERSION" /go/src/$IMPORT \
&& cd /go/src/$IMPORT
end_stage
# plugin helper
stage "installing plugin helper"
GOOS=linux GOARCH=amd64 go get -v github.com/abiosoft/caddyplug/caddyplug
end_stage
# check for modules support
go_mod=false
[ -f /go/src/$IMPORT/go.mod ] && export GO111MODULE=on && go_mod=true
# dns plugins
stage "fetching dns plugin sources"
dns_plugins
end_stage
# generate plugins
stage "generating plugins"
plugins
end_stage
# add plugins and telemetry
stage "customising plugins and telemetry"
if $go_mod; then module; else legacy; fi
end_stage
# build
stage "building caddy"
CGO_ENABLED=0 go build -o caddy
end_stage
# copy binary
stage "copying binary"
mkdir -p /install \
&& mv caddy /install \
&& /install/caddy -version
end_stage
echo "installed caddy version $VERSION at /install/caddy"