Docker Backend: fully support windows container (#4381)

pipeline/backend/docker/convert_win.go

@@ -0,0 +1,82 @@
+// Copyright 2024 Woodpecker Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package docker
+
+import (
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"go.woodpecker-ci.org/woodpecker/v2/pipeline/backend/types"
+)
+
+const (
+	osTypeWindows              = "windows"
+	defaultWindowsDriverLetter = "C:"
+)
+
+var MustNotAddWindowsLetterPattern = regexp.MustCompile(`^(?:` +
+	// Drive letter followed by colon and optional backslash (C: or C:\)
+	`[a-zA-Z]:(?:\\|$)|` +
+
+	// Device path starting with \\ or // followed by .\ or ./ (\\.\  or //./  or \\./ or //.\ )
+	`(?:\\\\|//)\.(?:\\|/).*|` +
+
+	// UNC path starting with \\ or // followed by non-dot (\server or //server)
+	`(?:\\\\|//)[^.]|` +
+
+	// Relative path starting with .\ or ./ (.\path or ./path)
+	`\.(?:\\|/)` +
+	`)`)
+
+func (e *docker) windowsPathPatch(step *types.Step) {
+	// only patch if target is windows
+	if strings.ToLower(e.info.OSType) != osTypeWindows {
+		return
+	}
+
+	// patch volumes to have an letter if not already set
+	for i, vol := range step.Volumes {
+		volParts, err := splitVolumeParts(vol)
+		if err != nil || len(volParts) < 2 {
+			// ignore non valid volumes for now
+			continue
+		}
+
+		// fix source destination
+		if strings.HasPrefix(volParts[0], "/") {
+			volParts[0] = filepath.Join(defaultWindowsDriverLetter, volParts[0])
+		}
+
+		// fix mount destination
+		if !MustNotAddWindowsLetterPattern.MatchString(volParts[1]) {
+			volParts[1] = filepath.Join(defaultWindowsDriverLetter, volParts[1])
+		}
+		step.Volumes[i] = strings.Join(volParts, ":")
+	}
+
+	// patch workspace
+	if !MustNotAddWindowsLetterPattern.MatchString(step.WorkspaceBase) {
+		step.WorkspaceBase = filepath.Join(defaultWindowsDriverLetter, step.WorkspaceBase)
+	}
+	if !MustNotAddWindowsLetterPattern.MatchString(step.WorkingDir) {
+		step.WorkingDir = filepath.Join(defaultWindowsDriverLetter, step.WorkingDir)
+	}
+	if ciWorkspace, ok := step.Environment["CI_WORKSPACE"]; ok {
+		if !MustNotAddWindowsLetterPattern.MatchString(ciWorkspace) {
+			step.Environment["CI_WORKSPACE"] = filepath.Join(defaultWindowsDriverLetter, ciWorkspace)
+		}
+	}
+}