Add script to find unused using declarations

As a complementer to clang-tidy-12 --checks="-*,misc-unused-using-decls"
Pros:
- simple, fast!
- finds some more unused declarations, somehow
- works on non-linux specific parts of the code
- clang-tidy (for me) trips on files with external headers, this does not

Change-Id: If2db989114ac5c2841ed2e89ff7bd7a9e419f567
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/150612
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

29 files changed, 42 insertions, 48 deletions

diff --git a/bin/find-unused-using.sh b/bin/find-unused-using.sh
new file mode 100755
index 000000000000..3521f64f49fd
--- /dev/null
+++ b/bin/find-unused-using.sh
@@ -0,0 +1,42 @@
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#!/bin/bash
+
+# TODO search also for 'using namespace com/::com/css' - this is likely the fattest target and clang-tidy can't do it
+for ns in accessibility basegfx chart com css cppu comphelper connectivity formula dbtools editeng rtl sfx2 svt osl oox sax_fastparser sal sd ucbhelper utl vcl xmloff; do
+    echo "Searching for namespace: $ns";
+    # search in cxx files, excluding URE headers, plus some files with false positives
+    for file in $(git grep -l "^\s*using :*$ns::" *hxx *cxx \
+        ':!include/com/' \
+        ':!include/cppu/' \
+        ':!include/cppuhelper/' \
+        ':!include/osl/' \
+        ':!include/rtl/' \
+        ':!include/sal/' \
+        ':!include/salhelper/' \
+        ':!include/systools/' \
+        ':!include/typelib/' \
+        ':!include/uno/' \
+        ':!include/sfx2/stbitem.hxx' \
+        ':!sw/source/uibase/inc/maildispatcher.hxx'
+        ) ; do
+        for class in $(git grep -h  "using :*$ns::" "$file" | rev | cut  -d : -f -1 | rev | cut -d " " -f 1 | tr -d ";") ; do
+            if [ "$ns" == "com" ] ; then # com namespace may be mentioned in relevant header name too
+                if [[ $(grep -c "$class" "$file") -eq 1 || $(grep -c "$class" "$file") -le 2 && $(grep -c -e "$class".hpp -e "$class".hxx -e "$class".h "$file") -eq 1 ]]; then
+                    echo "$file";
+                    echo "Class name in above file is mentioned once or twice: $class";
+                fi
+            else
+                if [ $(grep -c -F "$class" "$file") -eq 1 ]; then
+                    echo "$file";
+                    echo "Class name in above file is mentioned once: $class";
+                fi
+            fi
+        done
+    done
+done
+
+# vim: set noet sw=4 ts=4:
diff --git a/chart2/source/controller/chartapiwrapper/AreaWrapper.cxx b/chart2/source/controller/chartapiwrapper/AreaWrapper.cxx
index 4d5abf1e229c..995a0f92cf4d 100644
--- a/chart2/source/controller/chartapiwrapper/AreaWrapper.cxx
+++ b/chart2/source/controller/chartapiwrapper/AreaWrapper.cxx
@@ -32,7 +32,6 @@
 
 using namespace ::com::sun::star;
 using ::com::sun::star::beans::Property;
-using ::osl::MutexGuard;
 using ::com::sun::star::uno::Reference;
 using ::com::sun::star::uno::Sequence;
 
diff --git a/chart2/source/controller/chartapiwrapper/DiagramWrapper.cxx b/chart2/source/controller/chartapiwrapper/DiagramWrapper.cxx
index 5e1c76958ab4..f5cc10484417 100644
--- a/chart2/source/controller/chartapiwrapper/DiagramWrapper.cxx
+++ b/chart2/source/controller/chartapiwrapper/DiagramWrapper.cxx
@@ -79,7 +79,6 @@ using ::com::sun::star::uno::Any;
 using ::com::sun::star::uno::Sequence;
 using ::com::sun::star::beans::Property;
 using ::com::sun::star::chart::XAxis;
-using ::osl::MutexGuard;
 
 namespace
 {
diff --git a/chart2/source/controller/chartapiwrapper/LegendWrapper.cxx b/chart2/source/controller/chartapiwrapper/LegendWrapper.cxx
index edf955b43f7f..9ec8f02819ef 100644
--- a/chart2/source/controller/chartapiwrapper/LegendWrapper.cxx
+++ b/chart2/source/controller/chartapiwrapper/LegendWrapper.cxx
@@ -42,7 +42,6 @@
 
 using namespace ::com::sun::star;
 using ::com::sun::star::beans::Property;
-using ::osl::MutexGuard;
 using ::com::sun::star::uno::Any;
 using ::com::sun::star::uno::Reference;
 using ::com::sun::star::uno::Sequence;
diff --git a/chart2/source/controller/chartapiwrapper/TitleWrapper.cxx b/chart2/source/controller/chartapiwrapper/TitleWrapper.cxx
index edd88fc96393..75d6c9e98f1f 100644
--- a/chart2/source/controller/chartapiwrapper/TitleWrapper.cxx
+++ b/chart2/source/controller/chartapiwrapper/TitleWrapper.cxx
@@ -43,7 +43,6 @@
 
 using namespace ::com::sun::star;
 using ::com::sun::star::beans::Property;
-using ::osl::MutexGuard;
 using ::com::sun::star::uno::Any;
 using ::com::sun::star::uno::Reference;
 using ::com::sun::star::uno::Sequence;
diff --git a/chart2/source/controller/chartapiwrapper/WallFloorWrapper.cxx b/chart2/source/controller/chartapiwrapper/WallFloorWrapper.cxx
index bc6f15505471..dc5742aef63b 100644
--- a/chart2/source/controller/chartapiwrapper/WallFloorWrapper.cxx
+++ b/chart2/source/controller/chartapiwrapper/WallFloorWrapper.cxx
@@ -34,7 +34,6 @@ using namespace ::com::sun::star;
 using namespace ::com::sun::star::chart2;
 
 using ::com::sun::star::beans::Property;
-using ::osl::MutexGuard;
 using ::com::sun::star::uno::Reference;
 using ::com::sun::star::uno::Sequence;
 
diff --git a/chart2/source/tools/CachedDataSequence.cxx b/chart2/source/tools/CachedDataSequence.cxx
index 440e9f736fb6..d0f4c93ee848 100644
--- a/chart2/source/tools/CachedDataSequence.cxx
+++ b/chart2/source/tools/CachedDataSequence.cxx
@@ -35,8 +35,6 @@ using ::osl::MutexGuard;
 
 // necessary for MS compiler
 using ::comphelper::OPropertyContainer;
-using ::comphelper::OMutexAndBroadcastHelper;
-using ::comphelper::OPropertyArrayUsageHelper;
 using ::chart::impl::CachedDataSequence_Base;
 
 namespace
diff --git a/comphelper/source/misc/docpasswordhelper.cxx b/comphelper/source/misc/docpasswordhelper.cxx
index 5edb3949c977..d26a30e0ff20 100644
--- a/comphelper/source/misc/docpasswordhelper.cxx
+++ b/comphelper/source/misc/docpasswordhelper.cxx
@@ -51,7 +51,6 @@ using ::com::sun::star::task::PasswordRequestMode;
 using ::com::sun::star::task::PasswordRequestMode_PASSWORD_ENTER;
 using ::com::sun::star::task::PasswordRequestMode_PASSWORD_REENTER;
 using ::com::sun::star::task::XInteractionHandler;
-using ::com::sun::star::task::XInteractionRequest;
 
 using namespace ::com::sun::star;
 
diff --git a/connectivity/source/drivers/postgresql/pq_driver.cxx b/connectivity/source/drivers/postgresql/pq_driver.cxx
index aa443bad8350..8e07123a2b0f 100644
--- a/connectivity/source/drivers/postgresql/pq_driver.cxx
+++ b/connectivity/source/drivers/postgresql/pq_driver.cxx
@@ -40,8 +40,6 @@
 
 #include "pq_driver.hxx"
 
-using osl::MutexGuard;
-
 using com::sun::star::uno::Sequence;
 using com::sun::star::uno::Reference;
 using com::sun::star::uno::XInterface;
diff --git a/dbaccess/source/core/recovery/subcomponentrecovery.cxx b/dbaccess/source/core/recovery/subcomponentrecovery.cxx
index c761f8afe370..f51ff855b3a8 100644
--- a/dbaccess/source/core/recovery/subcomponentrecovery.cxx
+++ b/dbaccess/source/core/recovery/subcomponentrecovery.cxx
@@ -47,12 +47,10 @@ namespace dbaccess
 {
 
     using css::uno::Reference;
-    using css::uno::XInterface;
     using css::uno::UNO_QUERY;
     using css::uno::UNO_QUERY_THROW;
     using css::uno::UNO_SET_THROW;
     using css::uno::Exception;
-    using css::uno::RuntimeException;
     using css::uno::Any;
     using css::uno::Sequence;
     using css::uno::XComponentContext;
diff --git a/dbaccess/source/ui/misc/controllerframe.cxx b/dbaccess/source/ui/misc/controllerframe.cxx
index 67696042d9da..365e144390c0 100644
--- a/dbaccess/source/ui/misc/controllerframe.cxx
+++ b/dbaccess/source/ui/misc/controllerframe.cxx
@@ -42,7 +42,6 @@ namespace dbaui
     using ::com::sun::star::uno::UNO_QUERY_THROW;
     using ::com::sun::star::uno::UNO_SET_THROW;
     using ::com::sun::star::uno::Exception;
-    using ::com::sun::star::uno::RuntimeException;
     using ::com::sun::star::uno::Any;
     using ::com::sun::star::frame::XFrame;
     using ::com::sun::star::frame::FrameAction;
diff --git a/extensions/source/propctrlr/eventhandler.cxx b/extensions/source/propctrlr/eventhandler.cxx
index 304b8e5ebf94..3646cf09b6cd 100644
--- a/extensions/source/propctrlr/eventhandler.cxx
+++ b/extensions/source/propctrlr/eventhandler.cxx
@@ -117,7 +117,6 @@ namespace pcr
     using com::sun::star::uri::UriReferenceFactory;
     using com::sun::star::uri::XUriReferenceFactory;
     using com::sun::star::uri::XVndSunStarScriptUrlReference;
-    using ::com::sun::star::lang::XEventListener;
 
     namespace PropertyControlType = css::inspection::PropertyControlType;
     namespace PropertyAttribute = css::beans::PropertyAttribute;
diff --git a/forms/source/xforms/submission.cxx b/forms/source/xforms/submission.cxx
index 9cb97988d97e..368673a88318 100644
--- a/forms/source/xforms/submission.cxx
+++ b/forms/source/xforms/submission.cxx
@@ -55,8 +55,6 @@ using com::sun::star::form::submission::XSubmissionVetoListener;
 using com::sun::star::lang::WrappedTargetException;
 using com::sun::star::lang::NoSupportException;
 using com::sun::star::task::XInteractionHandler;
-using com::sun::star::task::XInteractionRequest;
-using com::sun::star::task::XInteractionContinuation;
 using com::sun::star::xforms::XModel;
 using com::sun::star::xforms::InvalidDataOnSubmitException;
 using com::sun::star::xml::xpath::XXPathObject;
diff --git a/fpicker/source/office/contentenumeration.cxx b/fpicker/source/office/contentenumeration.cxx
index 6ac33673909e..2a5b0156480a 100644
--- a/fpicker/source/office/contentenumeration.cxx
+++ b/fpicker/source/office/contentenumeration.cxx
@@ -63,7 +63,6 @@ namespace svt
     using ::com::sun::star::ucb::CommandAbortedException;
     using ::com::sun::star::ucb::XContentAccess;
     using ::com::sun::star::ucb::XCommandEnvironment;
-    using ::ucbhelper::ResultSetInclude;
     using ::ucbhelper::INCLUDE_FOLDERS_AND_DOCUMENTS;
 
 
diff --git a/fpicker/source/win32/WinImplHelper.cxx b/fpicker/source/win32/WinImplHelper.cxx
index 5d6e20d92319..9f81f6b60ffc 100644
--- a/fpicker/source/win32/WinImplHelper.cxx
+++ b/fpicker/source/win32/WinImplHelper.cxx
@@ -24,12 +24,6 @@
 #include <rtl/ustrbuf.hxx>
 #include <com/sun/star/uno/Sequence.hxx>
 
-using ::com::sun::star::lang::IllegalArgumentException;
-using ::com::sun::star::uno::Reference;
-using ::com::sun::star::uno::XInterface;
-using ::com::sun::star::uno::Any;
-using ::com::sun::star::uno::Sequence;
-
 const sal_Unicode   TILDE_SIGN = L'~';
 const sal_Unicode   AMPERSAND_SIGN = L'&';
 
diff --git a/odk/examples/cpp/complextoolbarcontrols/ListenerHelper.cxx b/odk/examples/cpp/complextoolbarcontrols/ListenerHelper.cxx
index a36e801382f7..d0fc8141db1d 100644
--- a/odk/examples/cpp/complextoolbarcontrols/ListenerHelper.cxx
+++ b/odk/examples/cpp/complextoolbarcontrols/ListenerHelper.cxx
@@ -26,7 +26,6 @@ using com::sun::star::frame::XDispatch;
 using com::sun::star::frame::XStatusListener;
 using com::sun::star::lang::EventObject;
 using com::sun::star::uno::Reference;
-using com::sun::star::uno::RuntimeException;
 using com::sun::star::frame::FeatureStateEvent;
 
 static AllListeners aListeners;
diff --git a/odk/examples/cpp/complextoolbarcontrols/MyJob.cxx b/odk/examples/cpp/complextoolbarcontrols/MyJob.cxx
index b67d3c93fb68..44201fb3be01 100644
--- a/odk/examples/cpp/complextoolbarcontrols/MyJob.cxx
+++ b/odk/examples/cpp/complextoolbarcontrols/MyJob.cxx
@@ -31,9 +31,6 @@ using com::sun::star::uno::Reference;
 using com::sun::star::uno::Any;
 using com::sun::star::uno::UNO_QUERY;
 using com::sun::star::uno::XInterface;
-using com::sun::star::uno::Exception;
-using com::sun::star::uno::RuntimeException;
-using com::sun::star::lang::IllegalArgumentException;
 using com::sun::star::lang::XMultiServiceFactory;
 using com::sun::star::beans::NamedValue;
 using com::sun::star::document::XEventBroadcaster;
diff --git a/sc/source/core/data/table5.cxx b/sc/source/core/data/table5.cxx
index 40f59f9b0151..69345ad42989 100644
--- a/sc/source/core/data/table5.cxx
+++ b/sc/source/core/data/table5.cxx
@@ -1055,8 +1055,6 @@ void lcl_syncFlags(const ScDocument* pDocument, ScFlatBoolColSegments& rColSegme
                    ScBitMaskCompressedArray<SCCOL, CRFlags>* pColFlags,
                    ScBitMaskCompressedArray<SCROW, CRFlags>* pRowFlags, const CRFlags nFlagMask)
 {
-    using ::sal::static_int_cast;
-
     CRFlags nFlagMaskComplement = ~nFlagMask;
 
     pRowFlags->AndValue(0, pDocument->MaxRow(), nFlagMaskComplement);
diff --git a/sd/source/core/stlsheet.cxx b/sd/source/core/stlsheet.cxx
index 71b08db448f0..218ec3c3b28f 100644
--- a/sd/source/core/stlsheet.cxx
+++ b/sd/source/core/stlsheet.cxx
@@ -71,7 +71,6 @@
 #include <string_view>
 
 using ::osl::MutexGuard;
-using ::osl::ClearableMutexGuard;
 using ::com::sun::star::table::BorderLine;
 using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::util;
diff --git a/sfx2/source/doc/docundomanager.cxx b/sfx2/source/doc/docundomanager.cxx
index 1e8d21d6034c..94f416c2d786 100644
--- a/sfx2/source/doc/docundomanager.cxx
+++ b/sfx2/source/doc/docundomanager.cxx
@@ -39,7 +39,6 @@ namespace sfx2
 
     using ::com::sun::star::uno::Reference;
     using ::com::sun::star::uno::XInterface;
-    using ::com::sun::star::uno::RuntimeException;
     using ::com::sun::star::uno::Sequence;
     using ::com::sun::star::document::XUndoAction;
     using ::com::sun::star::lang::NotInitializedException;
diff --git a/shell/source/win32/simplemail/smplmailclient.cxx b/shell/source/win32/simplemail/smplmailclient.cxx
index b4bef54ef15f..d40577892cb3 100644
--- a/shell/source/win32/simplemail/smplmailclient.cxx
+++ b/shell/source/win32/simplemail/smplmailclient.cxx
@@ -46,7 +46,6 @@
 using css::uno::UNO_QUERY;
 using css::uno::Reference;
 using css::uno::Exception;
-using css::uno::RuntimeException;
 using css::uno::Sequence;
 using css::lang::IllegalArgumentException;
 
diff --git a/shell/source/win32/simplemail/smplmailsuppl.cxx b/shell/source/win32/simplemail/smplmailsuppl.cxx
index 8fbd89b21c95..6f4eb0ea09a9 100644
--- a/shell/source/win32/simplemail/smplmailsuppl.cxx
+++ b/shell/source/win32/simplemail/smplmailsuppl.cxx
@@ -27,7 +27,6 @@
 #include <windows.h>
 
 using com::sun::star::uno::Reference;
-using com::sun::star::uno::RuntimeException;
 using com::sun::star::uno::Sequence;
 using com::sun::star::lang::XServiceInfo;
 using com::sun::star::system::XSimpleMailClientSupplier;
diff --git a/svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx b/svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx
index db211cae16dc..27eddc715420 100644
--- a/svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx
+++ b/svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx
@@ -109,7 +109,6 @@ namespace sdr::contact {
     using ::com::sun::star::uno::UNO_QUERY;
     using ::com::sun::star::uno::UNO_QUERY_THROW;
     using ::com::sun::star::uno::Exception;
-    using ::com::sun::star::uno::RuntimeException;
     using ::com::sun::star::awt::XControl;
     using ::com::sun::star::awt::XControlModel;
     using ::com::sun::star::awt::XControlContainer;
diff --git a/vcl/win/dtrans/MtaOleClipb.cxx b/vcl/win/dtrans/MtaOleClipb.cxx
index 8753cf46cbae..f3e19683419c 100644
--- a/vcl/win/dtrans/MtaOleClipb.cxx
+++ b/vcl/win/dtrans/MtaOleClipb.cxx
@@ -48,11 +48,6 @@
 
 #include <comphelper/windowserrorstring.hxx>
 
-//  namespace directives
-
-using osl::MutexGuard;
-using osl::ClearableMutexGuard;
-
 namespace /* private */
 {
     const wchar_t g_szWndClsName[] = L"MtaOleReqWnd###";
diff --git a/writerperfect/source/common/DocumentHandler.cxx b/writerperfect/source/common/DocumentHandler.cxx
index bfa9bb53a5d2..28730ab5ee99 100644
--- a/writerperfect/source/common/DocumentHandler.cxx
+++ b/writerperfect/source/common/DocumentHandler.cxx
@@ -108,7 +108,6 @@ static void unescapeXML(const char* s, const unsigned long sz, librevenge::RVNGS
 }
 
 using com::sun::star::uno::Reference;
-using com::sun::star::xml::sax::XAttributeList;
 using com::sun::star::xml::sax::XDocumentHandler;
 
 DocumentHandler::DocumentHandler(Reference<XDocumentHandler> const& xHandler)
diff --git a/xmlsecurity/source/xmlsec/mscrypt/securityenvironment_mscryptimpl.cxx b/xmlsecurity/source/xmlsec/mscrypt/securityenvironment_mscryptimpl.cxx
index 68b29fd2d3c7..cd3d40eb144e 100644
--- a/xmlsecurity/source/xmlsec/mscrypt/securityenvironment_mscryptimpl.cxx
+++ b/xmlsecurity/source/xmlsec/mscrypt/securityenvironment_mscryptimpl.cxx
@@ -53,8 +53,6 @@
 
 using namespace ::com::sun::star;
 using namespace ::com::sun::star::lang ;
-using ::com::sun::star::lang::XMultiServiceFactory ;
-using ::com::sun::star::lang::XSingleServiceFactory ;
 
 using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
 using ::com::sun::star::security::XCertificate ;
diff --git a/xmlsecurity/source/xmlsec/mscrypt/xmlsecuritycontext_mscryptimpl.cxx b/xmlsecurity/source/xmlsec/mscrypt/xmlsecuritycontext_mscryptimpl.cxx
index 7d71d4863894..f024a39b4791 100644
--- a/xmlsecurity/source/xmlsec/mscrypt/xmlsecuritycontext_mscryptimpl.cxx
+++ b/xmlsecurity/source/xmlsec/mscrypt/xmlsecuritycontext_mscryptimpl.cxx
@@ -30,8 +30,6 @@
 
 using namespace ::com::sun::star;
 using namespace ::com::sun::star::lang ;
-using ::com::sun::star::lang::XMultiServiceFactory ;
-using ::com::sun::star::lang::XSingleServiceFactory ;
 
 using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
 using ::com::sun::star::xml::crypto::XXMLSecurityContext ;
diff --git a/xmlsecurity/source/xmlsec/mscrypt/xmlsignature_mscryptimpl.cxx b/xmlsecurity/source/xmlsec/mscrypt/xmlsignature_mscryptimpl.cxx
index d20aa649efdb..2a3709938a59 100644
--- a/xmlsecurity/source/xmlsec/mscrypt/xmlsignature_mscryptimpl.cxx
+++ b/xmlsecurity/source/xmlsec/mscrypt/xmlsignature_mscryptimpl.cxx
@@ -38,11 +38,8 @@
 using namespace ::com::sun::star;
 using namespace ::com::sun::star::uno ;
 using namespace ::com::sun::star::lang ;
-using ::com::sun::star::lang::XMultiServiceFactory ;
-using ::com::sun::star::lang::XSingleServiceFactory ;
 
 using ::com::sun::star::xml::wrapper::XXMLElementWrapper ;
-using ::com::sun::star::xml::wrapper::XXMLDocumentWrapper ;
 using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
 using ::com::sun::star::xml::crypto::XXMLSignature ;
 using ::com::sun::star::xml::crypto::XXMLSignatureTemplate ;
diff --git a/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx b/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx
index aa0b0c2d4612..32ece48520d6 100644
--- a/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx
+++ b/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx
@@ -57,7 +57,6 @@ using namespace com::sun::star;
 using namespace ::com::sun::star::uno ;
 using namespace ::com::sun::star::lang ;
 
-using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
 using ::com::sun::star::security::XCertificate ;
 
 namespace std