enhance: test on Windows and fix what it found (#1348)

Adds a weekly and on-demand workflow that runs the cross-compiled tests on Windows Server 2025 Core in a [dockur/windows](https://github.com/dockur/windows) QEMU VM, and fixes the Windows bugs it found in host and UNC paths, env handling, shell quoting, post-task scripts, health checks, checkout, action symlinks, step summaries, Git client certificates and docker mode from a Windows host.

Host-mode steps now emit UTF-8, `bash` falls back to Git's bash instead of the WSL launcher, the runner can run as a native Windows service, steps can keep background helpers with `RUNNER_TRACKING_ID`, and Windows arm64 binaries are released.

Fixes: https://gitea.com/gitea/runner/issues/1339
Fixes: https://gitea.com/gitea/runner/issues/637
Fixes: https://gitea.com/gitea/runner/issues/1172
Fixes: https://gitea.com/gitea/runner/issues/347
Reviewed-on: https://gitea.com/gitea/runner/pulls/1348
Reviewed-by: bircni <[email protected]>

act/container/parse_env_file_test.go

@@ -34,6 +34,7 @@ func TestParseEnvFile(t *testing.T) {
 		want          map[string]string
 	}{
 		{"single line", "FOO=bar\nBAZ=qux\n", map[string]string{"FOO": "bar", "BAZ": "qux"}},
+		{"repeated names", "FOO=first\nfoo=middle\nFOO=last\n", map[string]string{"FOO": "last", "foo": "middle"}},
 		{"single line CRLF and final bare CR", "FOO=bar\r\nBAZ=qux\r", map[string]string{"FOO": "bar\r", "BAZ": "qux\r"}},
 		{"single line without final newline", "FOO=bar", map[string]string{"FOO": "bar"}},
 		{"blank lines", "\nFOO=bar\n\n   \nBAZ=qux\n\n", map[string]string{"FOO": "bar", "BAZ": "qux"}},
@@ -57,6 +58,17 @@ func TestParseEnvFile(t *testing.T) {
 			assert.Equal(t, test.want, env)
 		})
 	}
+	t.Run("ordered entries preserve repeated names", func(t *testing.T) {
+		hostEnv, envPath := newTestHostEnv(t)
+		require.NoError(t, os.WriteFile(envPath, []byte("FOO=first\r\nfoo<<EOF\r\nmiddle\r\nEOF\r\nFOO=last\r\n"), 0o600))
+		var entries [][2]string
+		require.NoError(t, ParseEnvFile(hostEnv, envPath, func(name, value string) {
+			entries = append(entries, [2]string{name, value})
+		}, true)(t.Context()))
+		assert.Equal(t, [][2]string{
+			{"FOO", "first"}, {"foo", "middle"}, {"FOO", "last"},
+		}, entries)
+	})
 	t.Run("Windows line endings", func(t *testing.T) {
 		hostEnv, envPath := newTestHostEnv(t)
 		require.NoError(t, os.WriteFile(envPath, []byte("FOO=bar\r\nMULTI<<EOF\r\nline1\r\nline2\nEOF\r\n"), 0o600))
@@ -86,13 +98,13 @@ func TestParseEnvFileInvalidHeredoc(t *testing.T) {
 	} {
 		t.Run(name, func(t *testing.T) {
 			e, envPath := newTestHostEnv(t)
-			require.NoError(t, os.WriteFile(envPath, []byte(content), 0o600))
+			require.NoError(t, os.WriteFile(envPath, []byte("APPLIED=before-error\n"+content), 0o600))
 
 			env := map[string]string{}
 			err := parseEnvFile(e, envPath, &env, false)(t.Context())
 			require.Error(t, err)
 			assert.Contains(t, err.Error(), "delimiter")
-			assert.Empty(t, env)
+			assert.Equal(t, map[string]string{"APPLIED": "before-error"}, env)
 		})
 	}
 }