From 6c9469f610c9e060d84cd4c5fd2dd46f6bfeb2ea Mon Sep 17 00:00:00 2001
From: Thomas Anderson <127358482+zc-devs@users.noreply.github.com>
Date: Wed, 7 Aug 2024 13:04:10 +0300
Subject: [PATCH] Improved Local backend detection (#4006)

Co-authored-by: 6543 <6543@obermui.de>
---
 docker/Dockerfile.agent.alpine.multiarch | 2 ++
 docker/Dockerfile.agent.multiarch        | 2 ++
 pipeline/backend/local/local.go          | 5 ++++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/docker/Dockerfile.agent.alpine.multiarch b/docker/Dockerfile.agent.alpine.multiarch
index c15d113f8..d873a683e 100644
--- a/docker/Dockerfile.agent.alpine.multiarch
+++ b/docker/Dockerfile.agent.alpine.multiarch
@@ -10,6 +10,8 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
 FROM docker.io/alpine:3.20
 RUN apk add -U --no-cache ca-certificates
 ENV GODEBUG=netdns=go
+# Internal setting do NOT change! Signals that woodpecker is running inside a container
+ENV WOODPECKER_IN_CONTAINER=true
 EXPOSE 3000
 
 COPY --from=build /src/dist/woodpecker-agent /bin/
diff --git a/docker/Dockerfile.agent.multiarch b/docker/Dockerfile.agent.multiarch
index 6349a3d50..52a58a0cf 100644
--- a/docker/Dockerfile.agent.multiarch
+++ b/docker/Dockerfile.agent.multiarch
@@ -10,6 +10,8 @@ RUN mkdir -p /etc/woodpecker
 
 FROM scratch
 ENV GODEBUG=netdns=go
+# Internal setting do NOT change! Signals that woodpecker is running inside a container
+ENV WOODPECKER_IN_CONTAINER=true
 EXPOSE 3000
 
 # copy certs from build image
diff --git a/pipeline/backend/local/local.go b/pipeline/backend/local/local.go
index 3ea42ba0f..fc7c0420a 100644
--- a/pipeline/backend/local/local.go
+++ b/pipeline/backend/local/local.go
@@ -63,7 +63,10 @@ func (e *local) Name() string {
 }
 
 func (e *local) IsAvailable(context.Context) bool {
-	return true
+	_, inContainer := os.LookupEnv("WOODPECKER_IN_CONTAINER")
+	// note: we don't need to check by args as this would indicate we are not in an container anyway ...
+	backend := os.Getenv("WOODPECKER_BACKEND")
+	return backend == "local" || !inContainer
 }
 
 func (e *local) Flags() []cli.Flag {