fix: support dest path for import-http

Fixes issue #456

Signed-off-by: Ramkumar Chinchani <rchincha@cisco.com>

pkg/stacker/import.go

@@ -248,7 +248,7 @@ func acquireUrl(c types.StackerConfig, storage types.Storage, i string, cache st
 			return "", errors.Errorf("The requested hash of %s import is different than the actual hash: %s != %s",
 				i, expectedHash, remoteHash)
 		}
-		return Download(cache, i, progress, expectedHash, remoteHash, remoteSize, mode, uid, gid)
+		return Download(cache, i, progress, expectedHash, remoteHash, remoteSize, idest, mode, uid, gid)
 	} else if url.Scheme == "stacker" {
 		// we always Grab() things from stacker://, because we need to
 		// mount the container's rootfs to get them and don't

pkg/stacker/network.go

@@ -18,9 +18,14 @@ import (
 
 // download with caching support in the specified cache dir.
 func Download(cacheDir string, url string, progress bool, expectedHash, remoteHash, remoteSize string,
-	mode *fs.FileMode, uid, gid int,
+	idest string, mode *fs.FileMode, uid, gid int,
 ) (string, error) {
-	name := path.Join(cacheDir, path.Base(url))
+	var name string
+	if idest != "" && idest[len(idest)-1:] != "/" {
+		name = path.Join(cacheDir, path.Base(idest))
+	} else {
+		name = path.Join(cacheDir, path.Base(url))
+	}
 
 	if fi, err := os.Stat(name); err == nil {
 		// Couldn't get remoteHash then use cached copy of import

test/import-http.bats

@@ -73,4 +73,34 @@ function teardown() {
     [ "$(sha reference/nm_orig)" == "$(sha dest/img/rootfs/root/nm)" ]
 }
 
+@test "importing to a dest" {
+    cat > img/stacker1.yaml <<EOF
+centos_base:
+    from:
+        type: oci
+        url: $CENTOS_OCI
+    run: |
+        ls
+EOF
+    cat > img/stacker2.yaml <<EOF
+img:
+    from:
+        type: oci
+        url: $(pwd)/oci:centos_base
+    import:
+        - path: https://www.cisco.com/favicon.ico
+          dest: /dest/icon
+    run: |
+        [ -f /dest/icon ]
+        [ ! -f /dest/favicon.ico ]
+        [ ! -f /stacker/favicon.ico ]
+EOF
+    # Build base image
+    stacker build -f img/stacker1.yaml
+    umoci ls --layout oci
+    # First execution creates the cache
+    stacker build -f img/stacker2.yaml
+    umoci ls --layout oci
+}
+
 # Ideally there would tests to hit/miss cache for servers which provide a hash