Create build_shared directory early

Promote the shared directory to a core directory and create it early,
meaning that it can be used from all stages, including prepare.

3 files changed, 8 insertions, 6 deletions

diff --git a/lib/shlib.sh b/lib/shlib.sh
index 11324c2..870eaf6 100644
--- a/lib/shlib.sh
+++ b/lib/shlib.sh
@@ -9,6 +9,7 @@ builddir=$OOB__builddir
 cachedir=$OOB__cachedir
 cacheonly=$OOB__cacheonly
 intermediatesdir=$OOB__intermediatesdir
+shareddir=$OOB__shareddir
 outputdir=$OOB__outputdir
 statedir=$OOB__statedir
 fsmount=$OOB__fsmount
diff --git a/modules/base/kspost.05.mount_shared.nochroot.sh b/modules/base/kspost.05.mount_shared.nochroot.sh
index cad30f4..012b86e 100644
--- a/modules/base/kspost.05.mount_shared.nochroot.sh
+++ b/modules/base/kspost.05.mount_shared.nochroot.sh
@@ -3,9 +3,7 @@
 
 . $OOB__shlib
 
-# create a "shared" intermediates directory which is also available at
-# /build_shared from inside the image
-mkdir -p $intermediatesdir/shared
+# share the intermediates/shared directory at /build_shared inside the
+# image build environment.
 echo "mkdir -p \$INSTALL_ROOT/build_shared"
-echo "mount --bind $intermediatesdir/shared \$INSTALL_ROOT/build_shared"
-
+echo "mount --bind $shareddir \$INSTALL_ROOT/build_shared"
diff --git a/osbuilder.py b/osbuilder.py
index ce8e723..2550665 100755
--- a/osbuilder.py
+++ b/osbuilder.py
@@ -65,6 +65,7 @@ class Stage(object):
         env['OOB__builddir'] = self.osb.builddir
         env['OOB__cachedir'] = self.osb.cachedir
         env['OOB__intermediatesdir'] = self.osb.intermediatesdir
+        env['OOB__shareddir'] = self.osb.shareddir
         env['OOB__outputdir'] = self.osb.outputdir
         env['OOB__statedir'] = self.osb.statedir
         env['OOB__fsmount'] = self.osb.fsmount
@@ -277,6 +278,7 @@ class OsBuilder(object):
             self.cachedir = os.path.join(self.builddir, 'cache')
 
         self.intermediatesdir = os.path.join(self.builddir, 'intermediates')
+        self.shareddir = os.path.join(self.intermediatesdir, 'shared')
         self.outputdir = os.path.join(self.builddir, 'output')
         self.statedir = os.path.join(self.builddir, 'state')
         self.fsmount = os.path.join(self.builddir, 'mnt-fs')
@@ -381,7 +383,8 @@ class OsBuilder(object):
             raise OsBuilderException("Missing cache, cannot use --cache-only")
 
         for dir in (self.builddir, self.cachedir, self.intermediatesdir,
-                    self.outputdir, self.statedir, self.fsmount):
+                    self.outputdir, self.statedir, self.fsmount,
+                    self.shareddir):
             if not os.path.exists(dir):
                 os.makedirs(dir)