Add package_history.bbclass which checks generated package against previous package looking for problematic changes

1 files changed, 100 insertions, 0 deletions

diff --git a/meta/classes/packagehistory.bbclass b/meta/classes/packagehistory.bbclass
new file mode 100644
index 0000000000..c48deb3e57
--- /dev/null
+++ b/meta/classes/packagehistory.bbclass
@@ -0,0 +1,100 @@
+PACKAGEFUNCS += "emit_pkghistory"
+
+PKGHIST_DIR = "${TMPDIR}/pkghistory/"
+
+
+#
+# Called during do_package to write out metadata about this package
+# for comparision when writing future packages
+#
+python emit_pkghistory() {
+        packages = bb.data.getVar('PACKAGES', d, True)
+        pkghistdir = bb.data.getVar('PKGHIST_DIR', d, True)
+
+
+        # Should check PACKAGES here to see if anything removed
+
+        def getpkgvar(pkg, var):
+                val = bb.data.getVar('%s_%s' % (var, pkg), d, 1)
+                if val:
+                        return val
+                val = bb.data.getVar('%s' % (var), d, 1)
+
+                return val
+
+        def getlastversion(pkg):
+                try:
+                        pe = os.path.basename(os.readlink(os.path.join(pkghistdir, pkg, "latest")))
+                        pv = os.path.basename(os.readlink(os.path.join(pkghistdir, pkg, pe, "latest")))
+                        pr = os.path.basename(os.readlink(os.path.join(pkghistdir, pkg, pe, pv, "latest")))
+                        return (pe, pv, pr)
+                except OSError:
+                        return (None, None, None)                       
+
+        for pkg in packages.split():
+                pe = getpkgvar(pkg, 'PE') or "0"
+                pv = getpkgvar(pkg, 'PV')
+                pr = getpkgvar(pkg, 'PR')
+                destdir = os.path.join(pkghistdir, pkg, pe, pv, pr)
+                
+                #
+                # Find out what the last version was
+                # Make sure the version did not decrease
+                #
+                lastversion = getlastversion(pkg)
+                (last_pe, last_pv, last_pr) = lastversion
+
+                if last_pe is not None:
+                        r = bb.utils.vercmp((pe, pv, pr), lastversion)
+                        if r < 0:
+                                bb.fatal("Package version for package %s went backwards which would break package feeds from (%s:%s-%s to %s:%s-%s)" % (pkg, last_pe, last_pv, last_pr, pe, pv, pr))
+
+                write_pkghistory(pkg, pe, pv, pr, d)
+
+                if last_pe is not None:
+                        check_pkghistory(pkg, pe, pv, pr, lastversion)
+
+                write_latestlink(pkg, pe, pv, pr, d)            
+}
+
+
+def check_pkghistory(pkg, pe, pv, pr, lastversion):
+        import bb
+
+        (last_pe, last_pv, last_pr) = lastversion
+
+        bb.debug(2, "Checking package history")
+        # RDEPENDS removed?
+        # PKG changed?
+        # Each file list of each package for file removals?
+
+
+def write_pkghistory(pkg, pe, pv, pr, d):
+        import bb, os
+        bb.debug(2, "Writing package history")
+
+        pkghistdir = bb.data.getVar('PKGHIST_DIR', d, True)
+
+        verpath = os.path.join(pkghistdir, pkg, pe, pv, pr)
+        if not os.path.exists(verpath):
+                os.makedirs(verpath)
+
+def write_latestlink(pkg, pe, pv, pr, d):
+        import bb, os
+
+        pkghistdir = bb.data.getVar('PKGHIST_DIR', d, True)
+
+        def rm_link(path):
+                try: 
+                        os.unlink(path)
+                except OSError:
+                        return
+
+        rm_link(os.path.join(pkghistdir, pkg, "latest"))
+        rm_link(os.path.join(pkghistdir, pkg, pe, "latest"))
+        rm_link(os.path.join(pkghistdir, pkg, pe, pv, "latest"))
+
+        os.symlink(os.path.join(pkghistdir, pkg, pe), os.path.join(pkghistdir, pkg, "latest"))
+        os.symlink(os.path.join(pkghistdir, pkg, pe, pv), os.path.join(pkghistdir, pkg, pe, "latest"))
+        os.symlink(os.path.join(pkghistdir, pkg, pe, pv, pr), os.path.join(pkghistdir, pkg, pe, pv, "latest"))
+