Feat: Allow anonymous dependency

synology/images.bzl

@@ -1,15 +1,44 @@
-def images(name = "images", src = ":PACKAGE_ICON.PNG"):
-    sizes = [16, 24, 32, 48, 64, 72, 90, 120, 256]
-
-    [native.genrule(
-        name = "{}_{}".format(name, sz),
-        srcs = [src],
-        outs = ["PACKAGE_ICON_{}.PNG".format(sz)],
-        cmd = "$(location @rules_synology//tools:resize) -src=$< -size={} -dest=$@".format(sz),
-        tools = ["@rules_synology//tools:resize"],
-    ) for sz in sizes]
-
-    native.filegroup(
-        name = "{}.group".format(name),
-        srcs = [":{}_{}".format(name, sz) for sz in sizes],
-    )
+def _images_impl(ctx):
+    out_collector = []
+    images_template = ctx.attr.images_template or "PACKAGE_ICON_{}.PNG"
+    for sz in ctx.attr.sizes:
+        target_name = images_template.format(sz)
+        target = ctx.actions.declare_file(target_name)
+        ctx.actions.run(
+            outputs = [target],
+            inputs = [ctx.file.src],
+            arguments = [
+                "-src={}".format(ctx.file.src.path),
+                "-size={}".format(sz),
+                "-dest={}".format(target.path),
+                "-verbose" if ctx.attr.verbose else "",
+            ],
+            executable = ctx.executable._resize,
+            mnemonic = "Resizing",
+        )
+        out_collector.append(target)
+
+    return [DefaultInfo(
+        files=depset(out_collector),
+        #runfiles= ctx.executable._resize[DefaultInfo].default_runfiles,
+        runfiles= ctx.attr._resize[DefaultInfo].default_runfiles,
+    )]
+
+
+images = rule(
+    doc = """Create a filegroup of resized images: 16x16, 24x24, etc""",
+    implementation = _images_impl,
+    attrs = {
+        "sizes": attr.int_list(mandatory = False, default = [ 16, 24, 32, 48, 64, 72, 90, 120, 256 ], doc = "sizes to convert: use a list of ints, each of which is a desired size of a square bounding box."),
+        "src": attr.label(allow_single_file = True,mandatory = True, doc = "Initial source image to convert to various sizes."),
+        "images_template": attr.string(doc = "template for output files: use a string with a single {} that will be replaced with the size.  The template should end with a suffix that determines the resulting format: .png, .jpg, .PNG, etc.  Note that Synology SPK packaging requires files of the form PACKAGE_ICON_<size>.PNG so changing this should ential converting the result back however desired for the payload of the SPK.", mandatory=False),
+        "_resize": attr.label(
+            default=Label("//tools:resize"),
+            allow_single_file = True,
+            executable = True,
+            cfg = "exec",
+        ),
+        "verbose": attr.bool(default=False, doc = "Verbosity can enable some debug messages from //tools:resize that can help resolve errors."),
+    }
+)
+

synology/info-file.bzl

@@ -25,7 +25,7 @@ attributes can be provided to unblock immediate progress.
 
 (`BUILD` file)
 ```
-load("@rules_synology//:defs.bzl", "info_file", "maintainer")
+load("@//:defs.bzl", "info_file", "maintainer")
 
 maintainer(
     name = "chickenandpork",

synology/unittests.bzl

@@ -40,9 +40,9 @@ def confirm_binary_matches_platform(binary, size = "small"):
         out = "{}_test_arch.sh".format(token),
         is_executable = True,
         substitutions = select({
-            "@rules_synology//arch:armada37xx": {"DETECT_STRING": " ELF 64-bit LSB pie executable, ARM aarch64"},
-            "@rules_synology//arch:denverton": {"DETECT_STRING": " ELF 64-bit LSB pie executable, x86-64"},
-            "@rules_synology//arch:geminilake": {"DETECT_STRING": " ELF 64-bit LSB pie executable, x86-64"},
+            "@//arch:armada37xx": {"DETECT_STRING": " ELF 64-bit LSB pie executable, ARM aarch64"},
+            "@//arch:denverton": {"DETECT_STRING": " ELF 64-bit LSB pie executable, x86-64"},
+            "@//arch:geminilake": {"DETECT_STRING": " ELF 64-bit LSB pie executable, x86-64"},
             "//conditions:default": {"DETECT_STRING": "no-possible-match"},
         }),
         template = ":{}_test_arch_tmpl".format(token),

synology/usr-local-linker.bzl

@@ -28,7 +28,7 @@ failing, triggering any rollback.
 This will cause a softlink to be created in `/usr/local/bin` that points to
 `/var/packages/<package>/target/bin/netfilter-mods`:
 ```
-load("@rules_synology//:defs.bzl", "usr_local_linker")
+load("@//:defs.bzl", "usr_local_linker")
 
 usr_local_linker(
     name = "softlinks",

tools/main.go

@@ -33,11 +33,14 @@ func main() {
 		dest = *destFilenamePattern
 	}
 
+	if *verbose {
+		log.Println("resizing", *srcFilename, "size", *maxSize, "to", dest)
+	}
 	err := ResizeImageFromFile(*srcFilename, dest, *maxSize)
 
 	if err == nil {
 		log.Println("OK:", dest)
 	} else {
-		log.Println("result:", dest, err)
+		log.Println("result:", dest, "err:", err)
 	}
 }

tools/resize.go

@@ -1,13 +1,14 @@
 package main
 
 import (
+	"errors"
 	"github.com/disintegration/imaging"
 )
 
 func ResizeImageFromFile(imageFile string, outFile string, newHeight int) error {
 	img, err := imaging.Open(imageFile)
 	if err != nil {
-		return err
+		return errors.New("Failure opening " + imageFile + ": " + err.Error())
 	}
 
 	// calculator new width of image