Correctly set the environment.

When running command without `shell=True`, python's subproccess will look
for variable `"PATH"` and `b"PATH"` and will complain if both are set.
So the defaultdict should not return something for `b"PATH"`.

We also escape space ` ` in the environment variables to not break
everything with directory containing space.

kiwixbuild/buildenv.py

@@ -4,7 +4,7 @@ import subprocess
 import platform
 import distro
 
-from .utils import pj, download_remote, Defaultdict
+from .utils import pj, download_remote, escape_path
 from ._global import neutralEnv, option
 
 
@@ -125,21 +125,34 @@ class BuildEnv:
         pkgconfig_path = pj(self.install_dir, self.libprefix, 'pkgconfig')
         env['PKG_CONFIG_PATH'] = ':'.join([env['PKG_CONFIG_PATH'], pkgconfig_path])
 
-        env['PATH'] = ':'.join([pj(self.install_dir, 'bin'), env['PATH']])
+        env['PATH'] = ':'.join([
+            escape_path(pj(self.install_dir, 'bin')),
+            env['PATH']
+        ])
 
         env['LD_LIBRARY_PATH'] = ':'.join([env['LD_LIBRARY_PATH'],
                                           pj(self.install_dir, 'lib'),
                                           pj(self.install_dir, self.libprefix)
                                           ])
 
-        env['QMAKE_CXXFLAGS'] = " ".join(['-I'+pj(self.install_dir, 'include'), env['QMAKE_CXXFLAGS']])
+        env['QMAKE_CXXFLAGS'] = " ".join([
-        env['CPPFLAGS'] = " ".join(['-I'+pj(self.install_dir, 'include'), env['CPPFLAGS']])
+            escape_path('-I'+pj(self.install_dir, 'include')),
-        env['QMAKE_LFLAGS'] = " ".join(['-L'+pj(self.install_dir, 'lib'),
+            env['QMAKE_CXXFLAGS']
-                                   '-L'+pj(self.install_dir, self.libprefix),
+        ])
-                                   env['QMAKE_LFLAGS']])
+        env['CPPFLAGS'] = " ".join([
-        env['LDFLAGS'] = " ".join(['-L'+pj(self.install_dir, 'lib'),
+            escape_path('-I'+pj(self.install_dir, 'include')),
-                                   '-L'+pj(self.install_dir, self.libprefix),
+            env['CPPFLAGS']
-                                   env['LDFLAGS']])
+        ])
+        env['QMAKE_LFLAGS'] = " ".join([
+            escape_path('-L'+pj(self.install_dir, 'lib')),
+            escape_path('-L'+pj(self.install_dir, self.libprefix)),
+            env['QMAKE_LFLAGS']
+        ])
+        env['LDFLAGS'] = " ".join([
+            escape_path('-L'+pj(self.install_dir, 'lib')),
+            escape_path('-L'+pj(self.install_dir, self.libprefix)),
+            env['LDFLAGS']
+        ])
 
         if cross_comp_flags:
             self.platformInfo.set_comp_flags(env)

kiwixbuild/dependencies/base.py

@@ -3,7 +3,7 @@ import os
 import shutil
 import time
 
-from kiwixbuild.utils import pj, Context, SkipCommand, WarningMessage, extract_archive, Defaultdict, StopBuild, run_command, colorize, copy_tree
+from kiwixbuild.utils import pj, Context, SkipCommand, WarningMessage, extract_archive, StopBuild, run_command, colorize, copy_tree
 from kiwixbuild.versions import main_project_versions, base_deps_versions
 from kiwixbuild._global import neutralEnv, option, get_target_step
 

kiwixbuild/dependencies/libmagic.py

@@ -6,7 +6,7 @@ from .base import (
     MakeBuilder,
 )
 
-from kiwixbuild.utils import Remotefile, pj, Defaultdict, SkipCommand, run_command
+from kiwixbuild.utils import Remotefile, pj, SkipCommand, run_command
 from kiwixbuild._global import get_target_step
 
 class LibMagic(Dependency):

kiwixbuild/utils.py

@@ -8,6 +8,7 @@ import urllib.request
 import urllib.error
 import ssl
 import subprocess
+import re
 from collections import namedtuple, defaultdict
 
 from kiwixbuild._global import neutralEnv, option
@@ -39,13 +40,25 @@ def xrun_find(name):
     return output[:-1].decode()
 
 
+regex_space = re.compile(r'((?<!\\) )')
+def escape_path(path):
+    path = str(path)
+    return regex_space.sub(r'\ ', path)
+
+
 class Defaultdict(defaultdict):
     def __getattr__(self, name):
         return self[name]
 
 
-def DefaultEnv():
+class DefaultEnv(Defaultdict):
-    return Defaultdict(str, os.environ)
+    def __init__(self):
+        super().__init__(str, os.environ)
+
+    def __getitem__(self, name):
+        if name == b'PATH':
+            raise KeyError
+        return super().__getitem__(name)
 
 
 def remove_duplicates(iterable, key_function=None):
@@ -265,7 +278,7 @@ def extract_archive(archive_path, dest_dir, topdir=None, name=None):
 def run_command(command, cwd, context, *, env=None, input=None):
     os.makedirs(cwd, exist_ok=True)
     if env is None:
-        env = Defaultdict(str, os.environ)
+        env = DefaultEnv()
     log = None
     try:
         if not option('verbose'):