Merge pull request 'ci: switch Go steps to gobuilder, enable S3 build cache' (#23) from benvin/gocache into main

Reviewed-on: #23

.woodpecker/build.yaml

@@ -3,7 +3,18 @@ when:
 
 steps:
   - name: build
-    image: golang:1.25
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
+    environment:
+      GOCACHE_S3_BUCKET: gocache
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-agent-tools
+      GOCACHEPROG: go-cache-plugin --cache-dir=/tmp/gocache
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
     commands:
       - make build
     backend_options:

.woodpecker/pre-commit.yaml

@@ -3,7 +3,18 @@ when:
 
 steps:
   - name: pre-commit
-    image: git.unkin.net/unkin/almalinux9-gobuilder:20260606
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
+    environment:
+      GOCACHE_S3_BUCKET: gocache
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-agent-tools
+      GOCACHEPROG: go-cache-plugin --cache-dir=/tmp/gocache
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
     commands:
       - uvx pre-commit run --all-files
     backend_options:

.woodpecker/release.yaml

@@ -3,7 +3,18 @@ when:
 
 steps:
   - name: test
-    image: golang:1.25
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
+    environment:
+      GOCACHE_S3_BUCKET: gocache
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-agent-tools
+      GOCACHEPROG: go-cache-plugin --cache-dir=/tmp/gocache
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
     commands:
       - go test -race ./...
     backend_options:
@@ -21,7 +32,18 @@ steps:
   # cross-platform binaries attached to the Gitea release. Each tool is a
   # separate main package, so they are built individually per os/arch.
   - name: build
-    image: git.unkin.net/unkin/almalinux9-gobuilder:20260606
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
+    environment:
+      GOCACHE_S3_BUCKET: gocache
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-agent-tools
+      GOCACHEPROG: go-cache-plugin --cache-dir=/tmp/gocache
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
     commands:
       - make build VERSION=${CI_COMMIT_TAG}
       # Shell variables/expansions are escaped as $$ so Woodpecker leaves them

.woodpecker/test.yaml

@@ -18,7 +18,18 @@ steps:
             cpu: 2
 
   - name: test
-    image: golang:1.25
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
+    environment:
+      GOCACHE_S3_BUCKET: gocache
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-agent-tools
+      GOCACHEPROG: go-cache-plugin --cache-dir=/tmp/gocache
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
     commands:
       - go test -v -race ./...
     backend_options: