.github, internal/flags: improve actions test runs (#32150)

This change enables more tests to run on GitHub actions. First, it
removes the `-short` flag passed to `go test`, unskipping some longer
running tests. We also enable the full consensus tests to run by
enabling submodules during git clone.

The EF now operates org wide runners with the `self-hosted-ghr` label.
These are auto-scaling runners which should ideally allow us to process
any amount of testing load we throw at them. The new runners have `HOME`
configured differently from the actual user home directory, so our
internal test for resolving `~` had to be adapted to work in this scenario.

.github/workflows/go.yml

@@ -1,18 +1,20 @@
-name: i386 linux tests
-
 on:
   push:
-    branches: [ master ]
+    branches:
+      - master
   pull_request:
-    branches: [ master ]
+    branches:
+      - master
   workflow_dispatch:
 
 jobs:
   lint:
     name: Lint
-    runs-on: self-hosted
+    runs-on: self-hosted-ghr
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: false
 
     # Cache build tools to avoid downloading them each time
     - uses: actions/cache@v4
@@ -23,7 +25,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
-        go-version: 1.23.0
+        go-version: 1.24
         cache: false
 
     - name: Run linters
@@ -32,17 +34,25 @@ jobs:
         go run build/ci.go check_generate
         go run build/ci.go check_baddeps
 
-  build:
-    runs-on: self-hosted
+  test:
+    name: Test
+    needs: lint
+    runs-on: self-hosted-ghr
+    strategy:
+      matrix:
+        go:
+          - '1.24'
+          - '1.23'
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
+
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.24.0
+          go-version: ${{ matrix.go }}
           cache: false
+
       - name: Run tests
-        run: go test -short ./...
-        env:
-          GOOS: linux
-          GOARCH: 386
+        run: go test ./...

internal/flags/flags_test.go

@@ -17,19 +17,18 @@
 package flags
 
 import (
-	"os/user"
 	"runtime"
 	"testing"
 )
 
 func TestPathExpansion(t *testing.T) {
-	user, _ := user.Current()
+	home := HomeDir()
 	var tests map[string]string
 
 	if runtime.GOOS == "windows" {
 		tests = map[string]string{
 			`/home/someuser/tmp`:        `\home\someuser\tmp`,
-			`~/tmp`:                     user.HomeDir + `\tmp`,
+			`~/tmp`:                     home + `\tmp`,
 			`~thisOtherUser/b/`:         `~thisOtherUser\b`,
 			`$DDDXXX/a/b`:               `\tmp\a\b`,
 			`/a/b/`:                     `\a\b`,
@@ -40,7 +39,7 @@ func TestPathExpansion(t *testing.T) {
 	} else {
 		tests = map[string]string{
 			`/home/someuser/tmp`:        `/home/someuser/tmp`,
-			`~/tmp`:                     user.HomeDir + `/tmp`,
+			`~/tmp`:                     home + `/tmp`,
 			`~thisOtherUser/b/`:         `~thisOtherUser/b`,
 			`$DDDXXX/a/b`:               `/tmp/a/b`,
 			`/a/b/`:                     `/a/b`,