cml1.bbclass: Add diffconfig task to cml1

diffconfig() is a new task that makes a diff between the
old and new config files and writes to the fragment.cfg result file.
menuconfig() always copy the original config file, so the user
doesn't need to copy it.

Signed-off-by: João Henrique Ferreira de Freitas <joaohf@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

diff --git a/meta/classes/cml1.bbclass b/meta/classes/cml1.bbclass
index e292ecbcf4e9a75ce0bd9ca11f0c26d095f72795..34c0c4e6c740adb68c60b3ec2eba82959b8b0826 100644 (file)
--- a/meta/classes/cml1.bbclass
+++ b/meta/classes/cml1.bbclass
@@ -16,8 +16,11 @@ HOST_LOADLIBES = "-lncurses"
 TERMINFO = "${STAGING_DATADIR_NATIVE}/terminfo"
 
 python do_menuconfig() {
+    import shutil
+
     try:
         mtime = os.path.getmtime(".config")
+        shutil.copy(".config", ".config.orig")
     except OSError:
         mtime = 0
 
@@ -38,3 +41,33 @@ do_menuconfig[depends] += "ncurses-native:do_populate_sysroot"
 do_menuconfig[nostamp] = "1"
 addtask menuconfig after do_configure
 
+python do_diffconfig() {
+    import shutil
+    import subprocess
+
+    workdir = d.getVar('WORKDIR', True)
+    fragment = workdir + '/fragment.cfg'
+    configorig = '.config.orig'
+    config = '.config'
+
+    try:
+        md5newconfig = bb.utils.md5_file(configorig)
+        md5config = bb.utils.md5_file(config)
+        isdiff = md5newconfig != md5config
+    except IOError as e:
+        bb.fatal("No config files found. Did you do menuconfig ?\n%s" % e)
+
+    if isdiff:
+        statement = 'diff -Nurp ' + configorig + ' ' + config + '| sed -n "s/^\+//p" >' + fragment
+        subprocess.call(statement, shell=True)
+
+        shutil.copy(configorig, config)
+
+        bb.plain("Config fragment has been dumped into:\n %s" % fragment)
+    else:
+        if os.path.exists(fragment):
+            os.unlink(fragment)
+}
+
+do_diffconfig[nostamp] = "1"
+addtask diffconfig