chore: bumps golang version to 1.26 in all places (#26393)

Signed-off-by: Patroklos Papapetrou <ppapapetrou76@gmail.com>
Co-authored-by: Nitish Kumar <justnitish06@gmail.com>

.github/workflows/ci-build.yaml

@@ -14,7 +14,7 @@ on:
 env:
   # Golang version to use across CI steps
   # renovate: datasource=golang-version packageName=golang
-  GOLANG_VERSION: '1.25.6'
+  GOLANG_VERSION: '1.26.0'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -111,7 +111,7 @@ jobs:
         uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9.2.0
         with:
           # renovate: datasource=go packageName=github.com/golangci/golangci-lint/v2 versioning=regex:^v(?<major>\d+)\.(?<minor>\d+)\.(?<patch>\d+)?$
-          version: v2.8.0
+          version: v2.9.0
           args: --verbose
 
   test-go:

.github/workflows/image.yaml

@@ -86,7 +86,7 @@ jobs:
     with:
       # Note: cannot use env variables to set go-version (https://docs.github.com/en/actions/using-workflows/reusing-workflows#limitations)
       # renovate: datasource=golang-version packageName=golang
-      go-version: 1.25.6
+      go-version: 1.26.0
       platforms: ${{ needs.set-vars.outputs.platforms }}
       push: false
 
@@ -103,7 +103,7 @@ jobs:
       ghcr_image_name: ${{ needs.set-vars.outputs.ghcr_image_name }}
       # Note: cannot use env variables to set go-version (https://docs.github.com/en/actions/using-workflows/reusing-workflows#limitations)
       # renovate: datasource=golang-version packageName=golang
-      go-version: 1.25.6
+      go-version: 1.26.0
       platforms: ${{ needs.set-vars.outputs.platforms }}
       push: true
     secrets:

.github/workflows/release.yaml

@@ -11,7 +11,7 @@ permissions: {}
 
 env:
   # renovate: datasource=golang-version packageName=golang
-  GOLANG_VERSION: '1.25.6' # Note: go-version must also be set in job argocd-image.with.go-version
+  GOLANG_VERSION: '1.26.0' # Note: go-version must also be set in job argocd-image.with.go-version
 
 jobs:
   argocd-image:
@@ -26,7 +26,7 @@ jobs:
       quay_image_name: ${{ needs.setup-variables.outputs.quay_image_name }}
       # Note: cannot use env variables to set go-version (https://docs.github.com/en/actions/using-workflows/reusing-workflows#limitations)
       # renovate: datasource=golang-version packageName=golang
-      go-version: 1.25.6
+      go-version: 1.26.0
       platforms: linux/amd64,linux/arm64,linux/s390x,linux/ppc64le
       push: true
     secrets:

.github/workflows/renovate.yaml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
         with:
           # renovate: datasource=golang-version packageName=golang
-          go-version: 1.25.6
+          go-version: 1.26.0
 
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@e23f4d9675532445118c886434f5a34292b630b4 #46.0.2

.golangci.yaml

@@ -126,6 +126,8 @@ linters:
       disable:
         # Suggest replacing omitempty with omitzero for struct fields.
         - omitzero
+        # Simplify code by using go1.26's new(expr). - generates lots of false positives.
+        - newexpr
 
     nolintlint:
       require-specific: true

Dockerfile

@@ -4,7 +4,7 @@ ARG BASE_IMAGE=docker.io/library/ubuntu:25.10@sha256:4a9232cc47bf99defcc8860ef62
 # Initial stage which pulls prepares build dependencies and CLI tooling we need for our final image
 # Also used as the image in CI jobs so needs all dependencies
 ####################################################################################################
-FROM docker.io/library/golang:1.25.6@sha256:06d1251c59a75761ce4ebc8b299030576233d7437c886a68b43464bad62d4bb1 AS builder
+FROM docker.io/library/golang:1.26.0@sha256:c83e68f3ebb6943a2904fa66348867d108119890a2c6a2e6f07b38d0eb6c25c5 AS builder
 
 WORKDIR /tmp
 
@@ -109,7 +109,7 @@ RUN HOST_ARCH=$TARGETARCH NODE_ENV='production' NODE_ONLINE_ENV='online' NODE_OP
 ####################################################################################################
 # Argo CD Build stage which performs the actual build of Argo CD binaries
 ####################################################################################################
-FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.25.6@sha256:06d1251c59a75761ce4ebc8b299030576233d7437c886a68b43464bad62d4bb1 AS argocd-build
+FROM --platform=$BUILDPLATFORM docker.io/library/golang:1.26.0@sha256:c83e68f3ebb6943a2904fa66348867d108119890a2c6a2e6f07b38d0eb6c25c5 AS argocd-build
 
 WORKDIR /go/src/github.com/argoproj/argo-cd
 

Dockerfile.tilt

@@ -1,4 +1,4 @@
-FROM docker.io/library/golang:1.25.6@sha256:06d1251c59a75761ce4ebc8b299030576233d7437c886a68b43464bad62d4bb1
+FROM docker.io/library/golang:1.26.0@sha256:c83e68f3ebb6943a2904fa66348867d108119890a2c6a2e6f07b38d0eb6c25c5
 
 ENV DEBIAN_FRONTEND=noninteractive
 

applicationset/utils/utils.go

@@ -388,8 +388,7 @@ func invalidGenerators(applicationSetInfo *argoappsv1.ApplicationSet) (bool, map
 	for index, generator := range applicationSetInfo.Spec.Generators {
 		v := reflect.Indirect(reflect.ValueOf(generator))
 		found := false
-		for i := 0; i < v.NumField(); i++ {
+		for _, field := range v.Fields() {
-			field := v.Field(i)
 			if !field.CanInterface() {
 				continue
 			}

cmd/argocd/commands/admin/settings_rbac.go

@@ -322,6 +322,7 @@ func getPolicy(ctx context.Context, policyFile string, kubeClient kubernetes.Int
 }
 
 // getPolicyFromFile loads a RBAC policy from given path
+// nolint:unparam // complains about the error being always nil which is false-positive
 func getPolicyFromFile(policyFile string) (string, string, string, error) {
 	var (
 		userPolicy  string

gitops-engine/go.mod

@@ -1,6 +1,6 @@
 module github.com/argoproj/gitops-engine
 
-go 1.25.5
+go 1.26.0
 
 require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc

go.mod

@@ -1,6 +1,6 @@
 module github.com/argoproj/argo-cd/v3
 
-go 1.25.5
+go 1.26.0
 
 require (
 	code.gitea.io/sdk/gitea v0.23.2

hack/get-previous-release/go.mod

@@ -1,6 +1,6 @@
 module github.com/argoproj/argo-cd/get-previous-release
 
-go 1.25.5
+go 1.26.0
 
 require (
 	github.com/stretchr/testify v1.9.0

test/container/Dockerfile

@@ -8,7 +8,7 @@ RUN ln -s /usr/lib/$(uname -m)-linux-gnu /usr/lib/linux-gnu
 # Please make sure to also check the contained yarn version and update the references below when upgrading this image's version
 FROM docker.io/library/node:22.9.0@sha256:8398ea18b8b72817c84af283f72daed9629af2958c4f618fe6db4f453c5c9328 AS node
 
-FROM docker.io/library/golang:1.25.1@sha256:d7098379b7da665ab25b99795465ec320b1ca9d4addb9f77409c4827dc904211 AS golang
+FROM docker.io/library/golang:1.26.0@sha256:c83e68f3ebb6943a2904fa66348867d108119890a2c6a2e6f07b38d0eb6c25c5 AS golang
 
 FROM docker.io/library/registry:3.0@sha256:6c5666b861f3505b116bb9aa9b25175e71210414bd010d92035ff64018f9457e AS registry
 

test/remote/Dockerfile

@@ -1,6 +1,6 @@
 ARG BASE_IMAGE=docker.io/library/ubuntu:25.10@sha256:4a9232cc47bf99defcc8860ef6222c99773330367fcecbf21ba2edb0b810a31e
 
-FROM docker.io/library/golang:1.25.5@sha256:8bbd14091f2c61916134fa6aeb8f76b18693fcb29a39ec6d8be9242c0a7e9260 AS go
+FROM docker.io/library/golang:1.26.0@sha256:c83e68f3ebb6943a2904fa66348867d108119890a2c6a2e6f07b38d0eb6c25c5 AS go
 
 RUN go install github.com/mattn/goreman@latest && \
     go install github.com/kisielk/godepgraph@latest