drone: update build flags

drone-runner-docker/PKGBUILD

@@ -1,35 +1,66 @@
 # Maintainer: Sl@ny <webmaster [at] slany [dot] work>
 pkgname=drone-runner-docker
 pkgver=1.8.2
-pkgrel=1
-pkgdesc="Drone is a Continuous Delivery platform built on Docker, written in Go - Free enterprise variant"
+pkgrel=2
+pkgdesc='Drone pipeline runner that executes builds inside Docker containers'
 arch=('x86_64')
 url="https://drone.io"
-license=('Apache')
-makedepends=('go' 'git' 'gcc')
+license=('custom')
+makedepends=('go' 'git')
+options=('!lto')
 depends=('docker')
 backup=('etc/drone/agent')
 source=(git+https://github.com/drone-runners/$pkgname.git#tag=v$pkgver
-        'drone-agent.service'
-        'agent.conf')
+    'drone-agent.service'
+    'agent.conf')
 sha256sums=('SKIP'
-            'dda7f52cb406beeb16024eb077ecfdd4b05929a955f796214646a16db5898ea2'
+            'a739e3efeffdf93dd13ba4947608ecd17ea585473de55a2323f6f3e89f787dca'
             '2c1a13f0d4bf83c1716db1b3179f38da7b9f0e762f781a8a6ab13cc683f057fe')
 
+prepare() {
+    cd "$pkgname"
+
+    # create directory for build output
+    mkdir -p build
+
+    # download dependencies
+    go mod download
+}
+
 build() {
-    cd "$srcdir/$pkgname"
-    go build -a -v -trimpath -buildmode=pie -mod=readonly -ldflags '-w -s' .
+    cd "$pkgname"
+
+    # set Go flags
+    export CGO_CPPFLAGS="${CPPFLAGS}"
+    export CGO_CFLAGS="${CFLAGS}"
+    export CGO_CXXFLAGS="${CXXFLAGS}"
+
+    go build -v \
+        -trimpath \
+        -buildmode=pie \
+        -mod=readonly \
+        -modcacherw \
+        -ldflags "-linkmode external -extldflags \"${LDFLAGS}\"" \
+        -o build \
+        .
 }
 
 package() {
-    cd "$srcdir"
-
-    # binaries
-    install -Dm755 "$pkgname/$pkgname" "$pkgdir"/usr/bin/drone-agent
 
     # service
     install -Dm644 drone-agent.service "$pkgdir/usr/lib/systemd/system/drone-agent.service"
 
     # config
     install -Dm644 agent.conf "$pkgdir/etc/drone/agent"
+
+    cd "$pkgname"
+
+    # binary
+    install -vDm755 -t "$pkgdir/usr/bin" build/*
+
+    # licenses
+    install -vDm644 -t "$pkgdir/usr/share/licenses/$pkgname" licenses/* LICENSE.md
+
+    # documentation
+    install -vDm644 -t "$pkgdir/usr/share/doc/$pkgname" README.md CHANGELOG.md
 }