WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

internal/sandbox/docker_host.go

@@ -0,0 +1,100 @@
+package sandbox
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// DetectLocalDockerHost returns the daemon endpoint the Docker CLI would use
+// on this machine when the workspace config leaves the host blank: DOCKER_HOST
+// first, then the current docker context, then DefaultDockerHost.
+//
+// /var/run/docker.sock is the Linux default and is often absent on macOS
+// (Colima, Docker Desktop, OrbStack each expose a socket under $HOME). An
+// operator who can run `docker ps` should not have to copy that path into
+// the settings form.
+func DetectLocalDockerHost() string {
+	if host := strings.TrimSpace(os.Getenv("DOCKER_HOST")); host != "" {
+		return host
+	}
+	if host := dockerCLIContextHost(); host != "" {
+		return host
+	}
+	return DefaultDockerHost
+}
+
+func dockerCLIContextHost() string {
+	configDir := strings.TrimSpace(os.Getenv("DOCKER_CONFIG"))
+	if configDir == "" {
+		home, err := os.UserHomeDir()
+		if err != nil || home == "" {
+			return ""
+		}
+		configDir = filepath.Join(home, ".docker")
+	}
+
+	name := strings.TrimSpace(os.Getenv("DOCKER_CONTEXT"))
+	if name == "" {
+		name = dockerCurrentContextName(configDir)
+	}
+	if name == "" || name == "default" {
+		return ""
+	}
+
+	entries, err := os.ReadDir(filepath.Join(configDir, "contexts", "meta"))
+	if err != nil {
+		return ""
+	}
+	for _, entry := range entries {
+		if !entry.IsDir() {
+			continue
+		}
+		host := dockerContextHost(
+			filepath.Join(configDir, "contexts", "meta", entry.Name(), "meta.json"),
+			name,
+		)
+		if host != "" {
+			return host
+		}
+	}
+	return ""
+}
+
+func dockerCurrentContextName(configDir string) string {
+	body, err := os.ReadFile(filepath.Join(configDir, "config.json"))
+	if err != nil {
+		return ""
+	}
+	var parsed struct {
+		CurrentContext string `json:"currentContext"`
+	}
+	if err := json.Unmarshal(body, &parsed); err != nil {
+		return ""
+	}
+	return strings.TrimSpace(parsed.CurrentContext)
+}
+
+func dockerContextHost(metaPath, wantName string) string {
+	body, err := os.ReadFile(metaPath)
+	if err != nil {
+		return ""
+	}
+	var parsed struct {
+		Name      string `json:"Name"`
+		Endpoints map[string]struct {
+			Host string `json:"Host"`
+		} `json:"Endpoints"`
+	}
+	if err := json.Unmarshal(body, &parsed); err != nil {
+		return ""
+	}
+	if parsed.Name != wantName {
+		return ""
+	}
+	if parsed.Endpoints == nil {
+		return ""
+	}
+	return strings.TrimSpace(parsed.Endpoints["docker"].Host)
+}