From 2339fbb2fc4f54161787afebb768d60afc3511ba Mon Sep 17 00:00:00 2001
From: Sebastian Luther <SebastianLuther@gmx.de>
Date: Fri, 9 Apr 2010 19:29:22 +0200
Subject: Implement REPLACING_VERSIONS and REPLACED_BY_VERSION

---
 bin/isolated-functions.sh              |  1 +
 pym/_emerge/EbuildProcess.py           |  3 ++-
 pym/portage/dbapi/vartree.py           |  6 ++++++
 pym/portage/package/ebuild/config.py   |  9 +++++++++
 pym/portage/package/ebuild/doebuild.py | 15 +++++++++++++++
 pym/portage/versions.py                |  5 +++++
 6 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/bin/isolated-functions.sh b/bin/isolated-functions.sh
index 9299f2c71..89e5e4b8b 100644
--- a/bin/isolated-functions.sh
+++ b/bin/isolated-functions.sh
@@ -566,6 +566,7 @@ save_ebuild_env() {
 			PROFILE_PATHS PWORKDIR QA_INTERCEPTORS \
 			RC_DEFAULT_INDENT RC_DOT_PATTERN RC_ENDCOL \
 			RC_INDENTATION READONLY_EBUILD_METADATA READONLY_PORTAGE_VARS \
+			REPLACING_VERSIONS REPLACED_BY_VERSION \
 			ROOT ROOTPATH RPMDIR TEMP TMP TMPDIR USE_EXPAND \
 			WARN XARGS _RC_GET_KV_CACHE
 
diff --git a/pym/_emerge/EbuildProcess.py b/pym/_emerge/EbuildProcess.py
index 255f7c553..bf7af4b9d 100644
--- a/pym/_emerge/EbuildProcess.py
+++ b/pym/_emerge/EbuildProcess.py
@@ -23,6 +23,7 @@ class EbuildProcess(AbstractEbuildProcess):
 		root_config = self.pkg.root_config
 		tree = self.tree
 		mydbapi = root_config.trees[tree].dbapi
+		vartree = root_config.trees["vartree"]
 		settings = self.settings
 		ebuild_path = settings["EBUILD"]
 		debug = settings.get("PORTAGE_DEBUG") == "1"
@@ -30,7 +31,7 @@ class EbuildProcess(AbstractEbuildProcess):
 
 		rval = doebuild(ebuild_path, self.phase,
 			root_config.root, settings, debug,
-			mydbapi=mydbapi, tree=tree, **kwargs)
+			mydbapi=mydbapi, tree=tree, vartree=vartree, **kwargs)
 
 		return rval
 
diff --git a/pym/portage/dbapi/vartree.py b/pym/portage/dbapi/vartree.py
index e6e42b9f9..a306fb6d6 100644
--- a/pym/portage/dbapi/vartree.py
+++ b/pym/portage/dbapi/vartree.py
@@ -3473,6 +3473,10 @@ class dblink(object):
 		if retval:
 			return retval
 
+		self.settings["REPLACING_VERSIONS"] = " ".join( 
+			[portage.versions.cpv_getversion(other.mycpv) for other in others_in_slot] )
+		self.settings.backup_changes("REPLACING_VERSIONS")
+
 		if slot_matches:
 			# Used by self.isprotected().
 			max_dblnk = None
@@ -3890,6 +3894,8 @@ class dblink(object):
 			emerge_log(_(" === Unmerging... (%s)") % (dblnk.mycpv,))
 			others_in_slot.remove(dblnk) # dblnk will unmerge itself now
 			dblnk._linkmap_broken = self._linkmap_broken
+			dblnk.settings["REPLACED_BY_VERSION"] = portage.versions.cpv_getversion(self.mycpv)
+			dblnk.settings.backup_changes("REPLACED_BY_VERSION")
 			unmerge_rval = dblnk.unmerge(trimworld=0,
 				ldpath_mtimes=prev_mtimes, others_in_slot=others_in_slot)
 
diff --git a/pym/portage/package/ebuild/config.py b/pym/portage/package/ebuild/config.py
index 3d02cd0a8..a3998cc79 100644
--- a/pym/portage/package/ebuild/config.py
+++ b/pym/portage/package/ebuild/config.py
@@ -187,6 +187,7 @@ class config(object):
 		"PORTAGE_TMPDIR", "PORTAGE_UPDATE_ENV",
 		"PORTAGE_VERBOSE", "PORTAGE_WORKDIR_MODE",
 		"PORTDIR", "PORTDIR_OVERLAY", "PREROOTPATH", "PROFILE_PATHS",
+		"REPLACING_VERSIONS", "REPLACED_BY_VERSION",
 		"ROOT", "ROOTPATH", "T", "TMP", "TMPDIR",
 		"USE_EXPAND", "USE_ORDER", "WORKDIR",
 		"XARGS",
@@ -2576,6 +2577,14 @@ class config(object):
 		if phase == 'depend':
 			mydict.pop('FILESDIR', None)
 
+		if phase not in ("pretend", "setup", "preinst", "postinst") or \
+			eapi in ("0", "1", "2", "3"):
+			mydict.pop("REPLACING_VERSIONS", None)
+
+		if phase not in ("prerm", "postrm") or \
+			eapi in ("0", "1", "2", "3"):
+			mydict.pop("REPLACED_BY_VERSION", None)
+
 		return mydict
 
 	def thirdpartymirrors(self):
diff --git a/pym/portage/package/ebuild/doebuild.py b/pym/portage/package/ebuild/doebuild.py
index 3121a05cf..9cf16cfea 100644
--- a/pym/portage/package/ebuild/doebuild.py
+++ b/pym/portage/package/ebuild/doebuild.py
@@ -513,6 +513,21 @@ def doebuild(myebuild, mydo, myroot, mysettings, debug=0, listonly=0,
 	tmpdir_orig = None
 
 	try:
+		if mydo in ("pretend", "setup"):
+			if not vartree:
+				writemsg("Warning: vartree not given to doebuild. " + \
+					"Cannot set REPLACING_VERSIONS in pkg_{pretend,setup}\n")
+			else:
+				vardb = vartree.dbapi
+				cpv = mysettings.mycpv
+				cp = portage.versions.cpv_getkey(cpv)
+				slot = mysettings.get("SLOT")
+				cpv_slot = cp + ":" + slot
+				mysettings["REPLACING_VERSIONS"] = " ".join(
+					set(portage.versions.cpv_getversion(match) \
+						for match in vardb.match(cpv_slot) + vardb.match(cpv)))
+				mysettings.backup_changes("REPLACING_VERSIONS")
+
 		if mydo in ("digest", "manifest", "help"):
 			# Temporarily exempt the depend phase from manifest checks, in case
 			# aux_get calls trigger cache generation.
diff --git a/pym/portage/versions.py b/pym/portage/versions.py
index a4765ef1c..89ab6e180 100644
--- a/pym/portage/versions.py
+++ b/pym/portage/versions.py
@@ -335,6 +335,11 @@ def cpv_getkey(mycpv):
 	else:
 		return mysplit[0]
 
+def cpv_getversion(mycpv):
+	"""Returns the v (including revision) from an cpv."""
+	cp = cpv_getkey(mycpv)
+	return mycpv[len(cp+"-"):]
+
 def catsplit(mydep):
         return mydep.split("/", 1)
 
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