Adds support for Go 1.26 (Feb 2026) to the go and go-postgres templates. (#408)

* Update Go version to 1.26 in Dockerfiles and documentation

* change in devcontainer configuration

* Update Go version in devcontainer template

* Update Go version proposals in devcontainer template

Removed outdated Go versions from proposals.

* Fix formatting

* debugging

* Update Go version to 1.26 and improve environment checks in test script

* revert to v1.10.4

* Update Go module dependency and enhance environment checks in test script

* Refactor Docker Compose and test scripts for improved clarity and functionality

* Fix indentation in docker-compose.yml

Author: sireeshajonnalagadda

src/go-postgres/.devcontainer/docker-compose.yml

@@ -5,34 +5,31 @@ volumes:
 
 services:
   app:
-    build: 
+    build:
       context: .
       dockerfile: Dockerfile
     env_file:
-        # Ensure that the variables in .env match the same variables in devcontainer.json
-        - .env
+       # Ensure that the variables in .env match the same variables in devcontainer.json
+       - .env
 
     volumes:
       - ../..:/workspaces:cached
-      
+
     # Overrides default command so things don't shut down after the process ends.
     command: sleep infinity
 
     # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
     network_mode: service:db
-
     # Use "forwardPorts" in **devcontainer.json** to forward an app port locally. 
     # (Adding the "ports" property to this file will not forward from a Codespace.)
 
   db:
     image: postgres:latest
     restart: unless-stopped
     volumes:
-      - postgres-data:/var/lib/postgresql/data
+      - postgres-data:/var/lib/postgresql
     env_file:
       # Ensure that the variables in .env match the same variables in devcontainer.json
       - .env
-
-
     # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
     # (Adding the "ports" property to this file will not forward from a Codespace.)

src/go-postgres/README.md

@@ -7,7 +7,7 @@ Use and develop Go + Postgres applications. Includes appropriate runtime args, G
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | Go version: | string | 1.25-trixie |
+| imageVariant | Go version: | string | 1.26-trixie |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 

src/go-postgres/devcontainer-template.json

@@ -1,6 +1,6 @@
 {
     "id": "go-postgres",
-    "version": "5.0.0",
+    "version": "6.0.0",
     "name": "Go & PostgreSQL",
     "description": "Use and develop Go + Postgres applications. Includes appropriate runtime args, Go, common tools, extensions, and dependencies.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/go-postgres",
@@ -11,16 +11,12 @@
             "type": "string",
             "description": "Go version:",
             "proposals": [
-                "1-trixie",
+				"1.26-trixie",
 				"1.25-trixie",
-				"1.24-trixie",
-				"1-bookworm",
-				"1.25-bookworm",
-                "1.24-bookworm",
-                "1-bullseye",
-                "1.24-bullseye"
+				"1.26-bookworm",
+				"1.25-bookworm"
             ],
-            "default": "1.25-trixie"
+            "default": "1.26-trixie"
         }
     },
     "platforms": ["Go"],

src/go/.devcontainer/devcontainer.json

@@ -4,19 +4,14 @@
 	"name": "Go",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
 	"image": "mcr.microsoft.com/devcontainers/go:2-${templateOption:imageVariant}"
-
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},
-
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
-
 	// Use 'postCreateCommand' to run commands after the container is created.
 	// "postCreateCommand": "go version",
-
 	// Configure tool-specific properties.
 	// "customizations": {},
-
 	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
 	// "remoteUser": "root"
-}
+}

src/go/README.md

@@ -7,7 +7,7 @@ Develop Go based applications. Includes appropriate runtime args, Go, common too
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | Go version: | string | 1.25-trixie |
+| imageVariant | Go version: | string | 1.26-trixie |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 

src/go/devcontainer-template.json

@@ -1,6 +1,6 @@
 {
     "id": "go",
-    "version": "5.0.0",
+    "version": "6.0.0",
     "name": "Go",
     "description": "Develop Go based applications. Includes appropriate runtime args, Go, common tools, extensions, and dependencies.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/go",
@@ -11,14 +11,12 @@
             "type": "string",
             "description": "Go version:",
             "proposals": [
-				"1-trixie",
-				"1.24-trixie",
+				"1.26-trixie",
 				"1.25-trixie",
-                "1.25-bookworm",
-                "1.24-bookworm",
-                "1.24-bullseye"
+				"1.26-bookworm",
+                "1.25-bookworm"
             ],
-            "default": "1.25-trixie"
+            "default": "1.26-trixie"
         }
     },
     "platforms": ["Go"],

test/go-postgres/go.mod

@@ -1,5 +1,5 @@
 module test-project
 
-go 1.17
+go 1.26
 
 require github.com/lib/pq v1.10.4

test/go-postgres/test.sh

@@ -9,6 +9,12 @@ checkCommon
 # Run template specific tests
 checkExtension "golang.Go"
 
+echo "=== Go Environment Check ==="
+go env GOPROXY
+go env GOSUMDB
+go version
+echo "==============================="
+
 check "lib pq check" go list github.com/lib/pq
 check "go test program" go run hello.go