image-artifact-names: Use SOURCE_DATE_EPOCH when making reproducible builds for deploy

Using DATETIME means the do_deploy output is not deterministic. Use SDE
when using reproducible builds since it is consistent for given input data.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/image-artifact-names.bbclass b/meta/classes/image-artifact-names.bbclass
index 3ac8dd731a6ab46d3ad6382364bdc98b3e9bd508..67f04e81658ec21cac3df25801154b97a0ff5b9b 100644 (file)
--- a/meta/classes/image-artifact-names.bbclass
+++ b/meta/classes/image-artifact-names.bbclass
@@ -4,7 +4,7 @@
 
 IMAGE_BASENAME ?= "${PN}"
 IMAGE_VERSION_SUFFIX ?= "-${DATETIME}"
-IMAGE_VERSION_SUFFIX[vardepsexclude] += "DATETIME"
+IMAGE_VERSION_SUFFIX[vardepsexclude] += "DATETIME SOURCE_DATE_EPOCH"
 IMAGE_NAME ?= "${IMAGE_BASENAME}-${MACHINE}${IMAGE_VERSION_SUFFIX}"
 IMAGE_LINK_NAME ?= "${IMAGE_BASENAME}-${MACHINE}"
 
@@ -13,3 +13,10 @@ IMAGE_LINK_NAME ?= "${IMAGE_BASENAME}-${MACHINE}"
 # by default) followed by additional suffices which describe the format (.ext4,
 # .ext4.xz, etc.).
 IMAGE_NAME_SUFFIX ??= ".rootfs"
+
+python () {
+    if bb.data.inherits_class('reproducible_build', d) and bb.data.inherits_class('deploy', d) and d.getVar("IMAGE_VERSION_SUFFIX") == "-${DATETIME}":
+        import datetime
+        d.setVar("IMAGE_VERSION_SUFFIX", "-" + datetime.datetime.fromtimestamp(int(d.getVar("SOURCE_DATE_EPOCH")), datetime.timezone.utc).strftime('%Y%m%d%H%M%S'))
+        d.setVarFlag("IMAGE_VERSION_SUFFIX", "vardepvalue", "")
+}