msan_builder: automatically include corresponding -dev packages.

Rather than having to specify them manually.

infra/base-images/msan-builder/Dockerfile

@@ -30,17 +30,10 @@ WORKDIR /msan
 ENV PYTHONUNBUFFERED 1
 RUN msan_build.py --work-dir=$WORK --create-subdirs \
     libarchive13 \
-    libarchive-dev \
     libfreetype6 \
-    libfreetype6-dev \
     libpcre2-posix0 \
-    libpcre2-dev \
     libpcre3 \
-    libpcre3-dev \
     libpng12-0 \
-    libpng12-dev \
     libssl1.0.0 \
-    libssl-dev \
     zlib1g \
-    zlib1g-dev \
     /msan

infra/base-images/msan-builder/msan_build.py

@@ -26,6 +26,7 @@ import subprocess
 import tempfile
 
 import apt
+from apt import debfile
 
 from packages import package
 import wrapper_utils
@@ -120,14 +121,32 @@ def SetUpEnvironment(work_dir):
 def FindPackageDebs(package_name, work_directory):
   """Find package debs."""
   deb_paths = []
+  cache = apt.Cache()
 
   for filename in os.listdir(work_directory):
     file_path = os.path.join(work_directory, filename)
     if not file_path.endswith('.deb'):
       continue
 
-    if filename.startswith(package_name + '_'):
+    # Matching package name.
+    deb = debfile.DebPackage(file_path)
+    if deb.pkgname == package_name:
       deb_paths.append(file_path)
+      continue
+
+    # Also include -dev packages that depend on the runtime package.
+    pkg = cache[deb.pkgname]
+    if pkg.section != 'libdevel':
+      continue
+
+    # But ignore -dbg packages.
+    if deb.pkgname.endswith('-dbg'):
+      continue
+
+    for dependency in deb.depends:
+      if any(dep[0] == package_name for dep in dependency):
+        deb_paths.append(file_path)
+        break
 
   return deb_paths
 
@@ -180,7 +199,7 @@ def ExtractLibraries(deb_paths, work_directory, output_directory):
 
 def GetPackage(package_name):
   apt_cache = apt.Cache()
-  version = apt_cache[package_name].versions[0]
+  version = apt_cache[package_name].candidate
   source_name = version.source_name
 
   custom_package_path = os.path.join(PACKAGES_DIR, source_name) + '.py'
@@ -249,7 +268,7 @@ def _CollectDependencies(apt_cache, pkg, cache, dependencies):
     return True
 
   is_c_or_cxx = False
-  for dependency in pkg.versions[0].dependencies:
+  for dependency in pkg.candidate.dependencies:
     dependency = dependency[0]
 
     if dependency.name in cache:
@@ -269,11 +288,6 @@ def GetBuildList(package_name):
   apt_cache = apt.Cache()
   pkg = apt_cache[package_name]
 
-  if pkg.section == 'libdevel':
-    # Ignore dependencies from -dev packages to keep things simple. These must
-    # be specified alongside the corresponding runtime package.
-    return [package_name]
-
   dependencies = []
   _CollectDependencies(apt_cache, pkg, {}, dependencies)
   return dependencies
@@ -333,6 +347,8 @@ class MSanBuilder(object):
     if not deb_paths:
       raise MSanBuildException('Failed to find .deb packages.')
 
+    print('Extracting', ' '.join(deb_paths))
+
     if create_subdirs:
       extract_directory = os.path.join(output_directory, package_name)
     else: