fix(snap): Refactor to avoid conflicts with readonly config provider …

…directory

Signed-off-by: Mengyi Wang <[email protected]>

snap/local/bin/source-env-file.sh

@@ -8,14 +8,14 @@ BINPATH="${ARGV[0]}"
 
 # binary name == service name/key
 SERVICE=$(basename "$BINPATH")
-ENV_FILE="$SNAP_DATA/config/$SERVICE/res/$SERVICE.env"
+ENV_FILE="$SNAP_DATA/config/$SERVICE/overrides.env"
 TAG="edgex-$SERVICE."$(basename "$0")
 
 if [ -f "$ENV_FILE" ]; then
     logger --tag=$TAG "sourcing $ENV_FILE"
     set -o allexport
     source "$ENV_FILE" set
-    set +o allexport 
+    set +o allexport
 fi
 
 exec "$@"

snap/local/helper-go/go.mod

@@ -2,4 +2,4 @@ module github.com/edgexfoundry/device-usb-camera/snap/local/helper-go
 
 go 1.20
 
-require github.com/canonical/edgex-snap-hooks/v3 v3.0.0-20230112170125-c0580fb68dab
+require github.com/canonical/edgex-snap-hooks/v3 v3.0.0-20230315153603-544c6823a1b0

snap/local/helper-go/go.sum

@@ -1,6 +1,6 @@
-github.com/canonical/edgex-snap-hooks/v3 v3.0.0-20230112170125-c0580fb68dab h1:wpiKN0hX8tqeZNa4jPvgyrqP8ixm1Xu7lcQA3bypR7w=
-github.com/canonical/edgex-snap-hooks/v3 v3.0.0-20230112170125-c0580fb68dab/go.mod h1:RvJ48YbdBPZn7L8OcylOpKIlIJD+nMjo5D7WSnPYusY=
+github.com/canonical/edgex-snap-hooks/v3 v3.0.0-20230315153603-544c6823a1b0 h1:h2C5W3mEC5g/s9W/mwh7X/3uSqKjNln/xHP41i8Mw/M=
+github.com/canonical/edgex-snap-hooks/v3 v3.0.0-20230315153603-544c6823a1b0/go.mod h1:qGZwprCZGZk2pA9BrleUtSrGrfHIaIz1356p8aqzuN4=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

snap/local/helper-go/install.go

@@ -20,6 +20,7 @@ import (
 	hooks "github.com/canonical/edgex-snap-hooks/v3"
 	"github.com/canonical/edgex-snap-hooks/v3/env"
 	"github.com/canonical/edgex-snap-hooks/v3/log"
+	"github.com/canonical/edgex-snap-hooks/v3/snapctl"
 )
 
 func installUSBCameraConfig() error {
@@ -37,11 +38,25 @@ func installRTSPConfig() error {
 func install() {
 	log.SetComponentName("install")
 
-	if err := installUSBCameraConfig(); err != nil {
-		log.Fatalf("Error installing Device USB Camera files: %s", err)
+	// Install default config files for USB camera app only if no config provider is connected
+	isConnected, err := snapctl.IsConnected(usbCameraApp + "-config").Run()
+	if err != nil {
+		log.Fatalf("Error checking interface connection: %s", err)
+	}
+	if !isConnected {
+		if err := installUSBCameraConfig(); err != nil {
+			log.Fatalf("Error installing Device USB Camera files: %s", err)
+		}
 	}
 
-	if err := installRTSPConfig(); err != nil {
-		log.Fatalf("Error installing RTSP Simple Server config file: %s", err)
+	// Install default config files for RTSP server app only if no config provider is connected
+	isConnected, err = snapctl.IsConnected(rtspServerApp + "-config").Run()
+	if err != nil {
+		log.Fatalf("Error checking interface connection: %s", err)
+	}
+	if !isConnected {
+		if err := installRTSPConfig(); err != nil {
+			log.Fatalf("Error installing RTSP Simple Server config file: %s", err)
+		}
 	}
 }