[gnome-continuous-yocto/gnomeostree-3.22-krogoth: 120/246] classes/externalsrc: re-run do_configure when configure files change

[Emmanuele Bassi <ebassi src gnome org>]

commit b169435134fd1a2894ac179f386697874b109a0f
Author: Paul Eggleton <paul eggleton linux intel com>
Date:   Wed Oct 12 10:33:47 2016 +1300

    classes/externalsrc: re-run do_configure when configure files change
    
    If the user modifies files such as CMakeLists.txt in the case of cmake,
    we want do_configure to re-run so that those changes can take effect. In
    order to accomplish that, have a variable CONFIGURE_FILES which
    specifies a list of files that will be put into do_configure's checksum
    (either full paths, or just filenames which will be searched for in the
    entire source tree). CONFIGURE_FILES then just needs to be set
    appropriately depending on what do_configure is doing; for now I've set
    this for autotools and cmake which are the most common cases.
    
    Fixes [YOCTO #7617].
    
    (From OE-Core rev: 923fc20c2862a6d75f949082c9f6532ab7e2d2cd)
    
    (From OE-Core rev: 4019bb8454c36c4baf1d4f23e2d4fafb6c47fbc0)
    
    Signed-off-by: Paul Eggleton <paul eggleton linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>
    Signed-off-by: Armin Kuster <akuster808 gmail com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/autotools.bbclass   |    2 ++
 meta/classes/cmake.bbclass       |    2 ++
 meta/classes/externalsrc.bbclass |   22 ++++++++++++++++++++++
 3 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index e168620..257e094 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -229,6 +229,8 @@ python autotools_copy_aclocals () {
 }
 autotools_copy_aclocals[vardepsexclude] += "MACHINE SDK_ARCH BUILD_ARCH SDK_OS BB_TASKDEPDATA"
 
+CONFIGURE_FILES = "${S}/configure.in ${S}/configure.ac ${S}/config.h.in ${S}/acinclude.m4 Makefile.am"
+
 autotools_do_configure() {
        # WARNING: gross hack follows:
        # An autotools built package generally needs these scripts, however only
diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index 77ab626..feabf6d 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -84,6 +84,8 @@ EOF
 
 addtask generate_toolchain_file after do_patch before do_configure
 
+CONFIGURE_FILES = "CMakeLists.txt"
+
 cmake_do_configure() {
        if [ "${OECMAKE_BUILDPATH}" ]; then
                bbnote "cmake.bbclass no longer uses OECMAKE_BUILDPATH.  The default behaviour is now 
out-of-tree builds with B=WORKDIR/build."
diff --git a/meta/classes/externalsrc.bbclass b/meta/classes/externalsrc.bbclass
index da7eb47..f173496 100644
--- a/meta/classes/externalsrc.bbclass
+++ b/meta/classes/externalsrc.bbclass
@@ -89,6 +89,7 @@ python () {
         # function is run every time
         d.setVar('BB_DONT_CACHE', '1')
         d.setVarFlag('do_compile', 'file-checksums', '${@srctree_hash_files(d)}')
+        d.setVarFlag('do_configure', 'file-checksums', '${@srctree_configure_hash_files(d)}')
 
         # We don't want the workdir to go away
         d.appendVar('RM_WORK_EXCLUDE', ' ' + d.getVar('PN', True))
@@ -152,3 +153,24 @@ def srctree_hash_files(d):
     else:
         ret = d.getVar('EXTERNALSRC', True) + '/*:True'
     return ret
+
+def srctree_configure_hash_files(d):
+    """
+    Get the list of files that should trigger do_configure to re-execute,
+    based on the value of CONFIGURE_FILES
+    """
+    in_files = (d.getVar('CONFIGURE_FILES', True) or '').split()
+    out_items = []
+    search_files = []
+    for entry in in_files:
+        if entry.startswith('/'):
+            out_items.append('%s:%s' % (entry, os.path.exists(entry)))
+        else:
+            search_files.append(entry)
+    if search_files:
+        s_dir = d.getVar('EXTERNALSRC', True)
+        for root, _, files in os.walk(s_dir):
+            for f in files:
+                if f in search_files:
+                    out_items.append('%s:True' % os.path.join(root, f))
+    return ' '.join(out_items)