From b3231072469568bd4028b53526cd5d3a88b487e1 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 27 Sep 2007 06:50:15 +0000
Subject: [PATCH] Display a short notification when an existing
 ${T}/environment sourced since it is easy to ignore and ignorance of it often
 leads to mysterious problems and general confusion. This message should not
 show in cases where it is obviously irrelevant, FEATURES=noauto, or
 PORTAGE_QUIET=1.

svn path=/main/trunk/; revision=7844
---
 bin/ebuild | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/bin/ebuild b/bin/ebuild
index 442dd4644..00c63a0ce 100755
--- a/bin/ebuild
+++ b/bin/ebuild
@@ -138,6 +138,25 @@ if "test" in pargs and "test" not in tmpsettings.features:
 	tmpsettings["FEATURES"] = " ".join(tmpsettings.features)
 	tmpsettings.backup_changes("FEATURES")
 
+build_dir_phases = set(["setup", "unpack", "compile",
+	"test", "install", "package", "rpm"])
+
+if "clean" not in pargs and \
+	"noauto" not in tmpsettings.features and \
+	tmpsettings.get("PORTAGE_QUIET") != "1" and \
+	build_dir_phases.intersection(pargs):
+	portage.doebuild_environment(ebuild, "setup", portage.root,
+		tmpsettings, debug, 1, portage.portdb)
+	env_filename = os.path.join(tmpsettings["T"], "environment")
+	if os.path.exists(env_filename):
+		msg = ("Existing ${T}/environment for '%s' will be sourced. " + \
+			"Run 'clean' to start with a fresh environment.") % \
+			(tmpsettings["PF"], )
+		from textwrap import wrap
+		msg = wrap(msg, 70)
+		for x in msg:
+			portage.writemsg(">>> %s\n" % x)
+
 for arg in pargs:
 	try:
 		if arg == "digest" and force:
-- 
2.26.2