Create a helper for checking if a string has a path component

This is used in a number of places, and in some places it is incomplete.
Use a helper to ensure it's used properly.

mesonbuild/backend/ninjabackend.py

@@ -27,7 +27,7 @@ from .. import compilers
 from ..compilers import CompilerArgs
 from ..linkers import ArLinker
 from ..mesonlib import File, MesonException, OrderedSet
-from ..mesonlib import get_compiler_for_source
+from ..mesonlib import get_compiler_for_source, has_path_sep
 from .backends import CleanTrees, InstallData
 from ..build import InvalidArguments
 
@@ -1335,7 +1335,7 @@ int dummy;
 
             # Set runtime-paths so we can run executables without needing to set
             # LD_LIBRARY_PATH, etc in the environment. Doesn't work on Windows.
-            if '/' in target.name or '\\' in target.name:
+            if has_path_sep(target.name):
                 # Target names really should not have slashes in them, but
                 # unfortunately we did not check for that and some downstream projects
                 # now have them. Once slashes are forbidden, remove this bit.
@@ -2324,7 +2324,7 @@ rule FORTRAN_DEP_HACK
         # FIXME FIXME: The usage of this is a terrible and unreliable hack
         if isinstance(fname, File):
             return fname.subdir != ''
-        return '/' in fname or '\\' in fname
+        return has_path_sep(fname)
 
     # Fortran is a bit weird (again). When you link against a library, just compiling a source file
     # requires the mod files that are output when single files are built. To do this right we would need to
@@ -2370,7 +2370,7 @@ rule FORTRAN_DEP_HACK
             pch = target.get_pch(lang)
             if not pch:
                 continue
-            if '/' not in pch[0] or '/' not in pch[-1]:
+            if not has_path_sep(pch[0]) or not has_path_sep(pch[-1]):
                 msg = 'Precompiled header of {!r} must not be in the same ' \
                       'directory as source, please put it in a subdirectory.' \
                       ''.format(target.get_basename())
@@ -2547,7 +2547,7 @@ rule FORTRAN_DEP_HACK
         commands += linker.get_option_link_args(self.environment.coredata.compiler_options)
         # Set runtime-paths so we can run executables without needing to set
         # LD_LIBRARY_PATH, etc in the environment. Doesn't work on Windows.
-        if '/' in target.name or '\\' in target.name:
+        if has_path_sep(target.name):
             # Target names really should not have slashes in them, but
             # unfortunately we did not check for that and some downstream projects
             # now have them. Once slashes are forbidden, remove this bit.

mesonbuild/build.py

@@ -23,7 +23,7 @@ from . import mlog
 from .mesonlib import File, MesonException, listify, extract_as_list
 from .mesonlib import typeslistify, stringlistify, classify_unity_sources
 from .mesonlib import get_filenames_templates_dict, substitute_values
-from .mesonlib import for_windows, for_darwin, for_cygwin, for_android
+from .mesonlib import for_windows, for_darwin, for_cygwin, for_android, has_path_sep
 from .compilers import is_object, clike_langs, sort_clike, lang_suffixes
 
 known_basic_kwargs = {'install': True,
@@ -286,7 +286,7 @@ class EnvironmentVariables:
 
 class Target:
     def __init__(self, name, subdir, subproject, build_by_default):
-        if '/' in name or '\\' in name:
+        if has_path_sep(name):
             # Fix failing test 53 when this becomes an error.
             mlog.warning('''Target "%s" has a path separator in its name.
 This is not supported, it can cause unexpected failures and will become
@@ -1067,7 +1067,7 @@ class Generator:
                 raise InvalidArguments('"output" may only contain strings.')
             if '@BASENAME@' not in rule and '@PLAINNAME@' not in rule:
                 raise InvalidArguments('Every element of "output" must contain @BASENAME@ or @PLAINNAME@.')
-            if '/' in rule or '\\' in rule:
+            if has_path_sep(rule):
                 raise InvalidArguments('"outputs" must not contain a directory separator.')
         if len(outputs) > 1:
             for o in outputs:
@@ -1666,7 +1666,7 @@ class CustomTarget(Target):
                 raise InvalidArguments('Output must not be empty.')
             if i.strip() == '':
                 raise InvalidArguments('Output must not consist only of whitespace.')
-            if '/' in i:
+            if has_path_sep(i):
                 raise InvalidArguments('Output must not contain a path segment.')
             if '@INPUT@' in i or '@INPUT0@' in i:
                 m = 'Output cannot contain @INPUT@ or @INPUT0@, did you ' \

mesonbuild/interpreter.py

@@ -21,7 +21,7 @@ from . import optinterpreter
 from . import compilers
 from .wrap import wrap, WrapMode
 from . import mesonlib
-from .mesonlib import FileMode, Popen_safe, listify, extract_as_list
+from .mesonlib import FileMode, Popen_safe, listify, extract_as_list, has_path_sep
 from .dependencies import ExternalProgram
 from .dependencies import InternalDependency, Dependency, DependencyException
 from .interpreterbase import InterpreterBase
@@ -1863,7 +1863,7 @@ external dependencies (including libraries) must go to "dependencies".''')
             raise InterpreterException('Subproject name must not contain a ".." path segment.')
         if os.path.isabs(dirname):
             raise InterpreterException('Subproject name must not be an absolute path.')
-        if '\\' in dirname or '/' in dirname:
+        if has_path_sep(dirname):
             mlog.warning('Subproject name has a path separator. This may cause unexpected behaviour.')
         if dirname in self.subproject_stack:
             fullstack = self.subproject_stack + [dirname]

mesonbuild/mesonlib.py

@@ -519,6 +519,12 @@ def get_library_dirs():
     unixdirs += glob('/lib/' + plat + '*')
     return unixdirs
 
+def has_path_sep(name, sep='/\\'):
+    'Checks if any of the specified @sep path separators are in @name'
+    for each in sep:
+        if each in name:
+            return True
+    return False
 
 def do_replacement(regex, line, confdata):
     missing_variables = set()

mesonbuild/scripts/yelphelper.py

@@ -17,6 +17,7 @@ import subprocess
 import shutil
 import argparse
 from .. import mlog
+from ..mesonlib import has_path_sep
 from . import destdir_join
 from .gettext import read_linguas
 
@@ -79,7 +80,7 @@ def install_help(srcdir, blddir, sources, media, langs, install_dir, destdir, pr
                 elif symlinks:
                     srcfile = os.path.join(c_install_dir, m)
                     mlog.log('Symlinking %s to %s.' % (outfile, srcfile))
-                    if '/' in m or '\\' in m:
+                    if has_path_sep(m):
                         os.makedirs(os.path.dirname(outfile), exist_ok=True)
                     try:
                         try:
@@ -94,7 +95,7 @@ def install_help(srcdir, blddir, sources, media, langs, install_dir, destdir, pr
                     # Lang doesn't have media file so copy it over 'C' one
                     infile = os.path.join(srcdir, 'C', m)
             mlog.log('Installing %s to %s' % (infile, outfile))
-            if '/' in m or '\\' in m:
+            if has_path_sep(m):
                 os.makedirs(os.path.dirname(outfile), exist_ok=True)
             shutil.copyfile(infile, outfile)
             shutil.copystat(infile, outfile)