From f84419de0d99acfd430beb4377ba1f942ce3fa16 Mon Sep 17 00:00:00 2001
From: Melora Hugues <dev@faercol.me>
Date: Tue, 3 Dec 2024 14:11:19 +0100
Subject: [PATCH] Add tools to build debian package

---
 Makefile                                      | 25 ++++++++++++++++---
 debian/sys-exporter/control                   |  5 ++++
 .../sys-exporter/etc/sys-exporter/config.yml  |  7 ++++++
 .../etc/systemd/system/sys-exporter.service   | 16 ++++++++++++
 debian/sys-exporter/postinst                  |  4 +++
 debian/tools/Dockerfile                       | 16 ++++++++++++
 debian/tools/build.sh                         | 17 +++++++++++++
 7 files changed, 87 insertions(+), 3 deletions(-)
 create mode 100644 debian/sys-exporter/control
 create mode 100644 debian/sys-exporter/etc/sys-exporter/config.yml
 create mode 100644 debian/sys-exporter/etc/systemd/system/sys-exporter.service
 create mode 100644 debian/sys-exporter/postinst
 create mode 100644 debian/tools/Dockerfile
 create mode 100755 debian/tools/build.sh

diff --git a/Makefile b/Makefile
index 0bfc66a..24e6b71 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,34 @@
 .PHONY: all client server
 
+BUILDDIR?=./build
+VERSION?=$(shell echo "$$(date +'%Y%m%d')-$$(git rev-parse --short=8 HEAD)")
+
 all: client server
 
 clean:
-	rm -rf ./build
+	rm -rf $(BUILDDIR)
 
 client:
-	go build -o ./build/client ./cmd/client
+	go build -o $(BUILDDIR)/client ./cmd/client
 
 server:
-	go build -o ./build/server ./cmd/server
+	go build -o $(BUILDDIR)/server ./cmd/server
 
 test:
 	go test -v ./...
+
+debpkg_server_prepare: server
+	rm -rf $(BUILDDIR)/debpkg
+	mkdir -p $(BUILDDIR)/debpkg/usr/bin $(BUILDDIR)/debpkg/DEBIAN $(BUILDDIR)/debpkg/etc/systemd/system $(BUILDDIR)/debpkg/etc/sys-exporter
+	install -m 755 -o root -g root $(BUILDDIR)/server $(BUILDDIR)/debpkg/usr/bin/
+	install -m 644 -o root -g root debian/sys-exporter/etc/systemd/system/sys-exporter.service $(BUILDDIR)/debpkg/etc/systemd/system/
+	install -m 644 -o root -g root debian/sys-exporter/etc/sys-exporter/config.yml $(BUILDDIR)/debpkg/etc/sys-exporter/
+	install -m 644 -o root -g root debian/sys-exporter/control $(BUILDDIR)/debpkg/DEBIAN/control
+	install -m 755 -o root -g root debian/sys-exporter/postinst $(BUILDDIR)/debpkg/DEBIAN/postinst
+
+debpkg_server: debpkg_server_prepare
+	dpkg-deb --build $(BUILDDIR)/debpkg/ $(BUILDDIR)/sys-exporter.deb
+
+debpkg_server_docker: server
+	docker build -t debian-builder ./debian/tools
+	docker run -t -e PACKAGE_VERSION="$(VERSION)" -v $(BUILDDIR):/build/ -v ./debian:/debian debian-builder
diff --git a/debian/sys-exporter/control b/debian/sys-exporter/control
new file mode 100644
index 0000000..a2b5513
--- /dev/null
+++ b/debian/sys-exporter/control
@@ -0,0 +1,5 @@
+Package: sys-exporter
+Version: ${PACKAGE_VERSION}
+Architecture: amd64
+Maintainer: Melora Hugues <dev@faercol.me>
+Description: System information exporter
diff --git a/debian/sys-exporter/etc/sys-exporter/config.yml b/debian/sys-exporter/etc/sys-exporter/config.yml
new file mode 100644
index 0000000..724e37d
--- /dev/null
+++ b/debian/sys-exporter/etc/sys-exporter/config.yml
@@ -0,0 +1,7 @@
+logging:
+  level: info
+collectors:
+  - system.loadavg
+  - system.meminfo
+  - services.systemd
+  - system.uptime
diff --git a/debian/sys-exporter/etc/systemd/system/sys-exporter.service b/debian/sys-exporter/etc/systemd/system/sys-exporter.service
new file mode 100644
index 0000000..7c974d3
--- /dev/null
+++ b/debian/sys-exporter/etc/systemd/system/sys-exporter.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=System information exporter daemon
+After=network-online.target
+Wants=network-online.target
+
+StartLimitIntervalSec=0
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/sys-exporter
+TimeoutStartSec=10
+Restart=on-failure
+RestartSec=60s
+
+[Install]
+RequiredBy=multi-user.target
diff --git a/debian/sys-exporter/postinst b/debian/sys-exporter/postinst
new file mode 100644
index 0000000..de9f0db
--- /dev/null
+++ b/debian/sys-exporter/postinst
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+systemctl enable sys-exporter.service
+systemctl start sys-exporter.service
diff --git a/debian/tools/Dockerfile b/debian/tools/Dockerfile
new file mode 100644
index 0000000..8857c8e
--- /dev/null
+++ b/debian/tools/Dockerfile
@@ -0,0 +1,16 @@
+FROM debian:bookworm
+
+RUN set -ex \
+    && sed -i -- 's/Types: deb/Types: deb deb-src/g' /etc/apt/sources.list.d/debian.sources \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+    build-essential \
+    cdbs \
+    devscripts \
+    equivs \
+    fakeroot \
+    && apt-get clean \
+    && rm -rf /tmp/* /var/tmp/*
+
+COPY build.sh /root/
+ENTRYPOINT [ "/root/build.sh" ]
diff --git a/debian/tools/build.sh b/debian/tools/build.sh
new file mode 100755
index 0000000..815eef1
--- /dev/null
+++ b/debian/tools/build.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -o errexit
+set -o pipefail
+set -o nounset
+
+rm -rf /build/debpkg
+mkdir -p /build/debpkg/usr/bin /build/debpkg/DEBIAN /build/debpkg/etc/systemd/system /build/debpkg/etc/sys-exporter
+install -m 755 -o root -g root /build/server /build/debpkg/usr/bin/
+install -m 644 -o root -g root /debian/sys-exporter/etc/systemd/system/sys-exporter.service /build/debpkg/etc/systemd/system/
+install -m 644 -o root -g root /debian/sys-exporter/etc/sys-exporter/config.yml /build/debpkg/etc/sys-exporter/
+install -m 644 -o root -g root /debian/sys-exporter/control /build/debpkg/DEBIAN/control
+install -m 755 -o root -g root /debian/sys-exporter/postinst /build/debpkg/DEBIAN/postinst
+
+envsubst < /debian/sys-exporter/control > /build/debpkg/DEBIAN/control
+
+dpkg-deb --build /build/debpkg/ /build/sys-exporter.deb