[OE-core] [PATCH] package_manager: don't race on a file when installing complementary packages

[Ross Burton]

PackageManager.install_complementary() uses WORKDIR/installed_pkgs.txt as a
temporary file but if two tasks are executing for the same recipe which uses
this file (e.g. bitbake my-image my-image:do_populate_sdk) then it's possible
for the file to be overwritten or deleted.

Instead of using a static filename, use tempfile to generate a unique name and
ensure it is cleaned up when finished.

Also move the glob generation/expansion earlier in the function as if there are
no globs to install, we don't need to generate a package list.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/lib/oe/package_manager.py | 47 ++++++++++++++++++++----------------------
 1 file changed, 22 insertions(+), 25 deletions(-)

diff --git a/meta/lib/oe/package_manager.py b/meta/lib/oe/package_manager.py
index 60d6e52..f7190cf 100644
--- a/meta/lib/oe/package_manager.py
+++ b/meta/lib/oe/package_manager.py
@@ -377,15 +377,6 @@ class PackageManager(object, metaclass=ABCMeta):
     installation
     """
     def install_complementary(self, globs=None):
-        # we need to write the list of installed packages to a file because the
-        # oe-pkgdata-util reads it from a file
-        installed_pkgs_file = os.path.join(self.d.getVar('WORKDIR'),
-                                           "installed_pkgs.txt")
-        with open(installed_pkgs_file, "w+") as installed_pkgs:
-            pkgs = self.list_installed()
-            output = oe.utils.format_pkg_list(pkgs, "arch")
-            installed_pkgs.write(output)
-
         if globs is None:
             globs = self.d.getVar('IMAGE_INSTALL_COMPLEMENTARY')
             split_linguas = set()
@@ -402,22 +393,28 @@ class PackageManager(object, metaclass=ABCMeta):
         if globs is None:
             return
 
-        cmd = [bb.utils.which(os.getenv('PATH'), "oe-pkgdata-util"),
-               "-p", self.d.getVar('PKGDATA_DIR'), "glob", installed_pkgs_file,
-               globs]
-        exclude = self.d.getVar('PACKAGE_EXCLUDE_COMPLEMENTARY')
-        if exclude:
-            cmd.extend(['--exclude=' + '|'.join(exclude.split())])
-        try:
-            bb.note("Installing complementary packages ...")
-            bb.note('Running %s' % cmd)
-            complementary_pkgs = subprocess.check_output(cmd, stderr=subprocess.STDOUT).decode("utf-8")
-        except subprocess.CalledProcessError as e:
-            bb.fatal("Could not compute complementary packages list. Command "
-                     "'%s' returned %d:\n%s" %
-                     (' '.join(cmd), e.returncode, e.output.decode("utf-8")))
-        self.install(complementary_pkgs.split(), attempt_only=True)
-        os.remove(installed_pkgs_file)
+        # we need to write the list of installed packages to a file because the
+        # oe-pkgdata-util reads it from a file
+        with tempfile.NamedTemporaryFile(mode="w+", prefix="installed-pkgs") as installed_pkgs:
+            pkgs = self.list_installed()
+            output = oe.utils.format_pkg_list(pkgs, "arch")
+            installed_pkgs.write(output)
+
+            cmd = [bb.utils.which(os.getenv('PATH'), "oe-pkgdata-util"),
+                   "-p", self.d.getVar('PKGDATA_DIR'), "glob", installed_pkgs.name,
+                   globs]
+            exclude = self.d.getVar('PACKAGE_EXCLUDE_COMPLEMENTARY')
+            if exclude:
+                cmd.extend(['--exclude=' + '|'.join(exclude.split())])
+            try:
+                bb.note("Installing complementary packages ...")
+                bb.note('Running %s' % cmd)
+                complementary_pkgs = subprocess.check_output(cmd, stderr=subprocess.STDOUT).decode("utf-8")
+            except subprocess.CalledProcessError as e:
+                bb.fatal("Could not compute complementary packages list. Command "
+                         "'%s' returned %d:\n%s" %
+                         (' '.join(cmd), e.returncode, e.output.decode("utf-8")))
+            self.install(complementary_pkgs.split(), attempt_only=True)
 
     def deploy_dir_lock(self):
         if self.deploy_dir is None:
-- 
2.8.1