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//===- TreeView.cpp - diagtool tool for printing warning flags ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DiagTool.h"
#include "DiagnosticNames.h"
#include "clang/AST/ASTDiagnostic.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;
static bool hasColors(const llvm::raw_ostream &out) {
if (&out != &llvm::errs() && &out != &llvm::outs())
return false;
return llvm::errs().is_displayed() && llvm::outs().is_displayed();
}
class TreePrinter {
public:
llvm::raw_ostream &out;
const bool ShowColors;
bool Internal;
TreePrinter(llvm::raw_ostream &out)
: out(out), ShowColors(hasColors(out)), Internal(false) {}
void setColor(llvm::raw_ostream::Colors Color) {
if (ShowColors)
out << llvm::sys::Process::OutputColor(Color, false, false);
}
void resetColor() {
if (ShowColors)
out << llvm::sys::Process::ResetColor();
}
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 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 (enabledByDefault(Group))
setColor(llvm::raw_ostream::GREEN);
else
setColor(llvm::raw_ostream::YELLOW);
out << "-W" << Group.getName() << "\n";
resetColor();
++Indent;
for (const GroupRecord &GR : Group.subgroups()) {
printGroup(GR, Indent);
}
if (Internal) {
for (const DiagnosticRecord &DR : Group.diagnostics()) {
if (ShowColors && !isIgnored(DR.DiagID))
setColor(llvm::raw_ostream::GREEN);
out.indent(Indent * 2);
out << DR.getName();
resetColor();
out << "\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 =
std::lower_bound(AllGroups.begin(), AllGroups.end(), 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() {
if (ShowColors) {
out << '\n';
setColor(llvm::raw_ostream::GREEN);
out << "GREEN";
resetColor();
out << " = enabled by default\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;
}
TreePrinter TP(out);
TP.Internal = Internal;
TP.showKey();
return ShowAll ? TP.showAll() : TP.showGroup(RootGroup);
}
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