image.bbclass/rootfs.py: add variables to rootfs[vardeps]

Added base variables and package backend specific variables to
rootfs[vardeps] in order for rootfs to rebuild when changes are made.

Set some variables as [func] to inform bitbake that they are shell
scripts, so that it invokes its shell dependency parsing. Without
marking them as functions, changes in the actual function body would
not trigger rootfs rebuilds.

[YOCTO #6502]

(From OE-Core rev: b8b6214b885a0757f0e628937f8fe21c92c45155)

Signed-off-by: Roxana Ciobanu <roxana.ciobanu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image.bbclass

@@ -75,7 +75,32 @@ LDCONFIGDEPEND_libc-musl = ""
 do_rootfs[depends] += "makedevs-native:do_populate_sysroot virtual/fakeroot-native:do_populate_sysroot ${LDCONFIGDEPEND}"
 do_rootfs[depends] += "virtual/update-alternatives-native:do_populate_sysroot update-rc.d-native:do_populate_sysroot"
 do_rootfs[recrdeptask] += "do_packagedata"
-do_rootfs[vardeps] += "BAD_RECOMMENDATIONS NO_RECOMMENDATIONS"
+
+def command_variables(d):
+    return ['ROOTFS_POSTPROCESS_COMMAND','ROOTFS_PREPROCESS_COMMAND','ROOTFS_POSTINSTALL_COMMAND','OPKG_PREPROCESS_COMMANDS','OPKG_POSTPROCESS_COMMANDS','IMAGE_POSTPROCESS_COMMAND',
+            'IMAGE_PREPROCESS_COMMAND','ROOTFS_POSTPROCESS_COMMAND','POPULATE_SDK_POST_HOST_COMMAND','POPULATE_SDK_POST_TARGET_COMMAND','SDK_POSTPROCESS_COMMAND','RPM_PREPROCESS_COMMANDS',         
+            'RPM_POSTPROCESS_COMMANDS']
+
+python () {
+    variables = command_variables(d)
+    for var in variables:
+        if d.getVar(var):
+            d.setVarFlag(var, 'func', '1')
+}
+
+def rootfs_variables(d):
+    from oe.rootfs import variable_depends
+    variables = ['IMAGE_DEVICE_TABLES','BUILD_IMAGES_FROM_FEEDS','IMAGE_TYPEDEP_','IMAGE_TYPES_MASKED','IMAGE_ROOTFS_ALIGNMENT','IMAGE_OVERHEAD_FACTOR','IMAGE_ROOTFS_SIZE','IMAGE_ROOTFS_EXTRA_SPACE',
+                 'IMAGE_ROOTFS_MAXSIZE','IMAGE_NAME','IMAGE_LINK_NAME','IMAGE_MANIFEST','DEPLOY_DIR_IMAGE','RM_OLD_IMAGE','IMAGE_FSTYPES','IMAGE_INSTALL_COMPLEMENTARY','IMAGE_LINGUAS','SDK_OS',
+                 'SDK_OUTPUT','SDKPATHNATIVE','SDKTARGETSYSROOT','SDK_DIR','SDK_VENDOR','SDKIMAGE_INSTALL_COMPLEMENTARY','SDK_PACKAGE_ARCHS','SDK_OUTPUT','SDKTARGETSYSROOT','MULTILIBRE_ALLOW_REP',
+                 'MULTILIB_TEMP_ROOTFS','MULTILIB_VARIANTS','MULTILIBS','ALL_MULTILIB_PACKAGE_ARCHS','MULTILIB_GLOBAL_VARIANTS','BAD_RECOMMENDATIONS','NO_RECOMMENDATIONS','PACKAGE_ARCHS',
+                 'PACKAGE_CLASSES','TARGET_VENDOR','TARGET_VENDOR','TARGET_ARCH','TARGET_OS','OVERRIDES','BBEXTENDVARIANT','FEED_DEPLOYDIR_BASE_URI','INTERCEPT_DIR','BUILDNAME','USE_DEVFS',
+                 'STAGING_KERNEL_DIR','COMPRESSIONTYPES']
+    variables.extend(command_variables(d))
+    variables.extend(variable_depends(d))
+    return " ".join(variables)
+
+do_rootfs[vardeps] += "${@rootfs_variables(d)}"
 
 do_build[depends] += "virtual/kernel:do_deploy"
 

meta/lib/oe/rootfs.py

@@ -327,6 +327,10 @@ class RpmRootfs(Rootfs):
 
         self.pm.rpm_setup_smart_target_config()
 
+    @staticmethod
+    def _depends_list():
+        return ['DEPLOY_DIR_RPM', 'INC_RPM_IMAGE_GEN', 'RPM_PREPROCESS_COMMANDS', 'RPM_POSTPROCESS_COMMANDS']
+
     def _get_delayed_postinsts(self):
         postinst_dir = self.d.expand("${IMAGE_ROOTFS}${sysconfdir}/rpm-postinsts")
         if os.path.isdir(postinst_dir):
@@ -418,6 +422,10 @@ class DpkgRootfs(Rootfs):
 
         self.pm.run_pre_post_installs()
 
+    @staticmethod
+    def _depends_list():
+        return ['DEPLOY_DIR_DEB', 'DEB_SDK_ARCH', 'APTCONF_TARGET', 'APT_ARGS', 'DPKG_ARCH', 'DEB_PREPROCESS_COMMANDS', 'DEB_POSTPROCESS_COMMAND']
+
     def _get_delayed_postinsts(self):
         pkg_list = []
         with open(self.image_rootfs + "/var/lib/dpkg/status") as status:
@@ -680,6 +688,10 @@ class OpkgRootfs(Rootfs):
         if self.inc_opkg_image_gen == "1":
             self.pm.backup_packaging_data()
 
+    @staticmethod
+    def _depends_list():
+        return ['IPKGCONF_SDK', 'IPK_FEED_URIS', 'DEPLOY_DIR_IPK', 'IPKGCONF_TARGET', 'INC_IPK_IMAGE_GEN', 'OPKG_ARGS', 'OPKGLIBDIR', 'OPKG_PREPROCESS_COMMANDS', 'OPKG_POSTPROCESS_COMMANDS', 'OPKGLIBDIR']
+
     def _get_delayed_postinsts(self):
         pkg_list = []
         status_file = os.path.join(self.image_rootfs,
@@ -723,6 +735,15 @@ class OpkgRootfs(Rootfs):
     def _cleanup(self):
         pass
 
+def get_class_for_type(imgtype):
+    return {"rpm": RpmRootfs,
+            "ipk": OpkgRootfs,
+            "deb": DpkgRootfs}[imgtype]
+
+def variable_depends(d, manifest_dir=None):
+    img_type = d.getVar('IMAGE_PKGTYPE', True)
+    cls = get_class_for_type(img_type)
+    return cls._depends_list()
 
 def create_rootfs(d, manifest_dir=None):
     env_bkp = os.environ.copy()