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. (trunk r7844)

svn path=/main/branches/2.1.2/; revision=7845

1 files changed, 19 insertions, 0 deletions

diff --git a/bin/ebuild b/bin/ebuild
index 8afba3afe..5761a0d19 100755
--- a/bin/ebuild
+++ b/bin/ebuild
@@ -139,6 +139,25 @@ 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: