Implement loading of environment.bz2 for the pkg_info() phase.

Since a temporary directory is required for processing of
${T}/environment, and we want a user who's not in the portage
group to be able to run the pkg_info() phase, PORTAGE_TMPDIR
is temporarily overridden with a directory created by mkdtemp.
To make this work, doebuild() creates the tempdir and cleans
it up in a finally block.

svn path=/main/trunk/; revision=8649

2 files changed, 29 insertions, 3 deletions

diff --git a/bin/ebuild.sh b/bin/ebuild.sh
index bd01b4750..c28312ec6 100755
--- a/bin/ebuild.sh
+++ b/bin/ebuild.sh
@@ -1601,7 +1601,8 @@ if hasq "depend" "${EBUILD_SH_ARGS}"; then
 	unset BIN_PATH BIN BODY FUNC_SRC
 fi
 
-if hasq ${EBUILD_PHASE} setup prerm && [ ! -f "${T}/environment" ]; then
+if hasq ${EBUILD_PHASE} info prerm setup \
+	&& [ ! -f "${T}/environment" ] ; then
 	bzip2 -dc "${EBUILD%/*}"/environment.bz2 > \
 		"${T}/environment" 2> /dev/null
 	if [ -s "${T}/environment" ] ; then
diff --git a/pym/portage/__init__.py b/pym/portage/__init__.py
index e3f2dd2c6..c496b32cf 100644
--- a/pym/portage/__init__.py
+++ b/pym/portage/__init__.py
@@ -3594,6 +3594,10 @@ def doebuild_environment(myebuild, mydo, myroot, mysettings, debug, use_cache, m
 		raise portage.exception.IncorrectParameter(
 			"Invalid ebuild path: '%s'" % myebuild)
 
+	# Make a backup of PORTAGE_TMPDIR prior to calling config.reset()
+	# so that the caller can override it.
+	tmpdir = mysettings["PORTAGE_TMPDIR"]
+
 	if mydo != "depend":
 		"""For performance reasons, setcpv only triggers reset when it
 		detects a package-specific change in config.  For the ebuild
@@ -3603,6 +3607,10 @@ def doebuild_environment(myebuild, mydo, myroot, mysettings, debug, use_cache, m
 		mysettings.reset(use_cache=use_cache)
 		mysettings.setcpv(mycpv, use_cache=use_cache, mydb=mydbapi)
 
+	# config.reset() might have reverted a change made by the caller,
+	# so restore it to it's original value.
+	mysettings["PORTAGE_TMPDIR"] = tmpdir
+
 	mysettings["EBUILD_PHASE"] = mydo
 
 	mysettings["PORTAGE_MASTER_PID"] = str(os.getpid())
@@ -4048,12 +4056,24 @@ def doebuild(myebuild, mydo, myroot, mysettings, debug=0, listonly=0,
 
 	logfile=None
 	builddir_lock = None
+	tmpdir = None
+	tmpdir_orig = None
 	try:
 		if mydo in ("digest", "manifest", "help"):
 			# Temporarily exempt the depend phase from manifest checks, in case
 			# aux_get calls trigger cache generation.
 			_doebuild_manifest_exempt_depend += 1
 
+		# If we don't need much space and we don't need a constant location,
+		# we can temporarily override PORTAGE_TMPDIR with a random temp dir
+		# so that there's no need for locking and it can be used even if the
+		# user isn't in the portage group.
+		if mydo in ("info",):
+			from tempfile import mkdtemp
+			tmpdir = mkdtemp()
+			tmpdir_orig = mysettings["PORTAGE_TMPDIR"]
+			mysettings["PORTAGE_TMPDIR"] = tmpdir
+
 		doebuild_environment(myebuild, mydo, myroot, mysettings, debug,
 			use_cache, mydbapi)
 
@@ -4145,13 +4165,15 @@ def doebuild(myebuild, mydo, myroot, mysettings, debug=0, listonly=0,
 
 		# Build directory creation isn't required for any of these.
 		have_build_dirs = False
-		if mydo not in ("digest", "fetch", "help", "info", "manifest"):
+		if mydo not in ("digest", "fetch", "help", "manifest"):
 			mystatus = prepare_build_dirs(myroot, mysettings, cleanup)
 			if mystatus:
 				return mystatus
 			have_build_dirs = True
 			# PORTAGE_LOG_FILE is set above by the prepare_build_dirs() call.
-			logfile = mysettings.get("PORTAGE_LOG_FILE", None)
+			logfile = mysettings.get("PORTAGE_LOG_FILE")
+			if logfile and not os.access(os.path.dirname(logfile), os.W_OK):
+				logfile = None
 		if mydo == "unmerge":
 			return unmerge(mysettings["CATEGORY"],
 				mysettings["PF"], myroot, mysettings, vartree=vartree)
@@ -4411,6 +4433,9 @@ def doebuild(myebuild, mydo, myroot, mysettings, debug=0, listonly=0,
 		return retval
 
 	finally:
+		if tmpdir:
+			mysettings["PORTAGE_TMPDIR"] = tmpdir_orig
+			shutil.rmtree(tmpdir)
 		if builddir_lock:
 			portage.locks.unlockdir(builddir_lock)