From 3888c91a6b0fb8cdd746f02b726210a8360e9ac9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20Schw=C3=B6rer?= <pubgit@mikescher.com>
Date: Tue, 6 Jun 2023 18:52:03 +0200
Subject: [PATCH] Switch to multi-stage Dockerbuild

---
 scnserver/Dockerfile | 24 ++++++++++++++++--------
 scnserver/Makefile   | 13 ++++++++-----
 scnserver/TODO.md    |  2 ++
 scnserver/dgi.go     | 42 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 68 insertions(+), 13 deletions(-)
 create mode 100644 scnserver/dgi.go

diff --git a/scnserver/Dockerfile b/scnserver/Dockerfile
index 1ffa44e..ac314e3 100644
--- a/scnserver/Dockerfile
+++ b/scnserver/Dockerfile
@@ -1,9 +1,19 @@
-FROM golang as builder
 
-WORKDIR /repo
-COPY  . /repo
 
-RUN make build
+FROM golang:1-bullseye AS builder
+
+RUN apt-get update && \
+    apt-get install -y ca-certificates openssl make git tar coreutils && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY . /buildsrc
+
+RUN cd /buildsrc && make build
+
+
+
+
+
 
 FROM debian:bookworm
 
@@ -13,9 +23,7 @@ RUN apt-get update && \
     rm -rf /var/cache/apt/archives && \
     rm -rf /var/lib/apt/lists
 
-COPY --from=builder /repo/_build/scn_backend /app/scnserver
-
-COPY DOCKER_GIT_INFO    /app/DOCKER_GIT_INFO
+COPY --from=builder   /buildsrc/_build/scn_backend   /app/server
 
 RUN mkdir /data
 
@@ -23,4 +31,4 @@ WORKDIR /app
 
 EXPOSE 80
 
-CMD ["/app/scnserver"]
+CMD ["/app/server"]
diff --git a/scnserver/Makefile b/scnserver/Makefile
index 51e9533..5529fe4 100644
--- a/scnserver/Makefile
+++ b/scnserver/Makefile
@@ -21,12 +21,15 @@ gow:
 	which gow || go install github.com/mitranim/gow@latest
 	gow -e "go,mod,html,css,json,yaml,js" run -tags "timetzdata sqlite_fts5 sqlite_foreign_keys" blackforestbytes.com/simplecloudnotifier/cmd/scnserver
 
-docker:
+dgi:
 	[ ! -f "DOCKER_GIT_INFO" ] || rm DOCKER_GIT_INFO
-	git rev-parse --abbrev-ref HEAD    >> DOCKER_GIT_INFO
-	git rev-parse              HEAD    >> DOCKER_GIT_INFO
-	git log -1 --format=%cd --date=iso >> DOCKER_GIT_INFO
-	git config --get remote.origin.url >> DOCKER_GIT_INFO
+	echo -n "VCSTYPE="     >> DOCKER_GIT_INFO ; echo "git"                         >> DOCKER_GIT_INFO
+	echo -n "BRANCH="      >> DOCKER_GIT_INFO ; git rev-parse --abbrev-ref HEAD    >> DOCKER_GIT_INFO
+	echo -n "HASH="        >> DOCKER_GIT_INFO ; git rev-parse              HEAD    >> DOCKER_GIT_INFO
+	echo -n "COMMITTIME="  >> DOCKER_GIT_INFO ; git log -1 --format=%cd --date=iso >> DOCKER_GIT_INFO
+	echo -n "REMOTE="      >> DOCKER_GIT_INFO ; git config --get remote.origin.url >> DOCKER_GIT_INFO
+
+build-docker: dgi
 	docker build \
             -t "$(DOCKER_NAME):$(HASH)" \
             -t "$(DOCKER_NAME):$(NAMESPACE)-latest" \
diff --git a/scnserver/TODO.md b/scnserver/TODO.md
index 6b4d82a..42292ee 100644
--- a/scnserver/TODO.md
+++ b/scnserver/TODO.md
@@ -49,6 +49,8 @@
 
  - TODO-comments
 
+ - multistage build
+
 #### PERSONAL
 
  - in my script: use `srvname` for sendername
diff --git a/scnserver/dgi.go b/scnserver/dgi.go
new file mode 100644
index 0000000..f73d6ae
--- /dev/null
+++ b/scnserver/dgi.go
@@ -0,0 +1,42 @@
+package server
+
+import (
+	_ "embed"
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"strings"
+)
+
+//go:embed DOCKER_GIT_INFO
+var FileDockerGitInfo string
+
+var CommitHash *string
+var VCSType *string
+var CommitTime *string
+var BranchName *string
+var RemoteURL *string
+
+func init() {
+	for _, v := range strings.Split(FileDockerGitInfo, "\n") {
+		if v == "" {
+			continue
+		} else if strings.HasPrefix(v, "VCSTYPE=") {
+			VCSType = langext.Ptr(v[len("VCSTYPE="):])
+			fmt.Printf("Found DGI Config: '%s' := '%s'\n", "VCSType", *VCSType)
+		} else if strings.HasPrefix(v, "BRANCH=") {
+			BranchName = langext.Ptr(v[len("BRANCH="):])
+			fmt.Printf("Found DGI Config: '%s' := '%s'\n", "BranchName", *BranchName)
+		} else if strings.HasPrefix(v, "HASH=") {
+			CommitHash = langext.Ptr(v[len("HASH="):])
+			fmt.Printf("Found DGI Config: '%s' := '%s'\n", "CommitHash", *CommitHash)
+		} else if strings.HasPrefix(v, "COMMITTIME=") {
+			CommitTime = langext.Ptr(v[len("COMMITTIME="):])
+			fmt.Printf("Found DGI Config: '%s' := '%s'\n", "CommitTime", *CommitTime)
+		} else if strings.HasPrefix(v, "REMOTE=") {
+			RemoteURL = langext.Ptr(v[len("REMOTE="):])
+			fmt.Printf("Found DGI Config: '%s' := '%s'\n", "RemoteURL", *RemoteURL)
+		} else {
+			fmt.Printf("[ERROR] Failed to parse DGI Config '%s'\n", v)
+		}
+	}
+}