[PATCH] meta: change apt source fetcher to hook into SRC_URI

[Henning Schild <henning.schild@siemens.com>]

From: Henning Schild <henning.schild@siemens.com>

This patch allows users to use "debian://" URIs in SRC_URI and cleans up
the interface for recipes.

Signed-off-by: Henning Schild <henning.schild@siemens.com>
---
 meta-isar/recipes-app/hello/hello.inc |  2 +-
 meta/classes/base.bbclass             | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/meta-isar/recipes-app/hello/hello.inc b/meta-isar/recipes-app/hello/hello.inc
index 3976b15..ceab7a2 100644
--- a/meta-isar/recipes-app/hello/hello.inc
+++ b/meta-isar/recipes-app/hello/hello.inc
@@ -3,7 +3,7 @@
 inherit dpkg
 
 # this will fetch and unpack the sources from upstream debian
-SRC_APT = "${PN}"
+SRC_URI = "debian://${PN}=${PV}"
 
 MAINTAINER = "Your name here <you@domain.com>"
 CHANGELOG_V = "${PV}-99+isar"
diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index d4082de..9885fdc 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -96,6 +96,26 @@ python() {
                                   + ws + "root_cleandirs\n")
 }
 
+# filter out all "debian://" URIs out of SRC_URI and stick them into SRC_APT
+# this makes for a nicer user interface
+python() {
+    src_uri = (d.getVar('SRC_URI', True) or "").split()
+    if len(src_uri) == 0:
+        return
+
+    prefix = "debian://"
+    new_src_uri = []
+    deb_src_uri = []
+    for u in src_uri:
+        if u.startswith(prefix):
+            deb_src_uri.append(u[len(prefix):])
+        else:
+            new_src_uri.append(u)
+
+    d.setVar('SRC_URI', ' '.join(new_src_uri))
+    d.prependVar('SRC_APT', ' '.join(deb_src_uri))
+}
+
 do_fetch[dirs] = "${DL_DIR}"
 do_fetch[file-checksums] = "${@bb.fetch.get_checksum_file_list(d)}"
 do_fetch[vardeps] += "SRCREV"
-- 
2.19.2