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//===- TreeView.cpp - diagtool tool for printing warning flags ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "DiagTool.h"
#include "DiagnosticNames.h"
#include "clang/Basic/AllDiagnostics.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Process.h"
DEF_DIAGTOOL("tree", "Show warning flags in a tree view", TreeView)
using namespace clang;
using namespace diagtool;
class TreePrinter {
using Colors = llvm::raw_ostream::Colors;
public:
llvm::raw_ostream &out;
bool Internal;
TreePrinter(llvm::raw_ostream &out) : out(out), Internal(false) {}
static bool isIgnored(unsigned DiagID) {
// FIXME: This feels like a hack.
static clang::DiagnosticsEngine Diags(new DiagnosticIDs,
new DiagnosticOptions);
return Diags.isIgnored(DiagID, SourceLocation());
}
static bool unimplemented(const GroupRecord &Group) {
if (!Group.diagnostics().empty())
return false;
for (const GroupRecord &GR : Group.subgroups())
if (!unimplemented(GR))
return false;
return true;
}
static bool enabledByDefault(const GroupRecord &Group) {
for (const DiagnosticRecord &DR : Group.diagnostics()) {
if (isIgnored(DR.DiagID))
return false;
}
for (const GroupRecord &GR : Group.subgroups()) {
if (!enabledByDefault(GR))
return false;
}
return true;
}
void printGroup(const GroupRecord &Group, unsigned Indent = 0) {
out.indent(Indent * 2);
if (unimplemented(Group))
out << Colors::RED;
else if (enabledByDefault(Group))
out << Colors::GREEN;
else
out << Colors::YELLOW;
out << "-W" << Group.getName() << "\n" << Colors::RESET;
++Indent;
for (const GroupRecord &GR : Group.subgroups()) {
printGroup(GR, Indent);
}
if (Internal) {
for (const DiagnosticRecord &DR : Group.diagnostics()) {
if (!isIgnored(DR.DiagID))
out << Colors::GREEN;
out.indent(Indent * 2);
out << DR.getName() << Colors::RESET << "\n";
}
}
}
int showGroup(StringRef RootGroup) {
ArrayRef<GroupRecord> AllGroups = getDiagnosticGroups();
if (RootGroup.size() > UINT16_MAX) {
llvm::errs() << "No such diagnostic group exists\n";
return 1;
}
const GroupRecord *Found = llvm::lower_bound(AllGroups, RootGroup);
if (Found == AllGroups.end() || Found->getName() != RootGroup) {
llvm::errs() << "No such diagnostic group exists\n";
return 1;
}
printGroup(*Found);
return 0;
}
int showAll() {
ArrayRef<GroupRecord> AllGroups = getDiagnosticGroups();
llvm::DenseSet<unsigned> NonRootGroupIDs;
for (const GroupRecord &GR : AllGroups) {
for (auto SI = GR.subgroup_begin(), SE = GR.subgroup_end(); SI != SE;
++SI) {
NonRootGroupIDs.insert((unsigned)SI.getID());
}
}
assert(NonRootGroupIDs.size() < AllGroups.size());
for (unsigned i = 0, e = AllGroups.size(); i != e; ++i) {
if (!NonRootGroupIDs.count(i))
printGroup(AllGroups[i]);
}
return 0;
}
void showKey() {
out << '\n' << Colors::GREEN << "GREEN" << Colors::RESET
<< " = enabled by default";
out << '\n' << Colors::RED << "RED" << Colors::RESET
<< " = unimplemented (accepted for GCC compatibility)\n\n";
}
};
static void printUsage() {
llvm::errs() << "Usage: diagtool tree [--internal] [<diagnostic-group>]\n";
}
int TreeView::run(unsigned int argc, char **argv, llvm::raw_ostream &out) {
// First check our one flag (--flags-only).
bool Internal = false;
if (argc > 0) {
StringRef FirstArg(*argv);
if (FirstArg.equals("--internal")) {
Internal = true;
--argc;
++argv;
}
}
bool ShowAll = false;
StringRef RootGroup;
switch (argc) {
case 0:
ShowAll = true;
break;
case 1:
RootGroup = argv[0];
if (RootGroup.startswith("-W"))
RootGroup = RootGroup.substr(2);
if (RootGroup == "everything")
ShowAll = true;
// FIXME: Handle other special warning flags, like -pedantic.
break;
default:
printUsage();
return -1;
}
out.enable_colors(out.has_colors());
TreePrinter TP(out);
TP.Internal = Internal;
TP.showKey();
return ShowAll ? TP.showAll() : TP.showGroup(RootGroup);
}
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