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// Copyright 2015 Google Inc. All rights reserved
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build ignore
#include "command.h"
#include <unordered_map>
#include <unordered_set>
#include "dep.h"
#include "eval.h"
#include "flags.h"
#include "log.h"
#include "strutil.h"
#include "var.h"
namespace {
class AutoVar : public Var {
public:
virtual const char* Flavor() const override { return "undefined"; }
virtual VarOrigin Origin() const override { return VarOrigin::AUTOMATIC; }
virtual void AppendVar(Evaluator*, Value*) override { CHECK(false); }
virtual StringPiece String() const override {
ERROR("$(value %s) is not implemented yet", sym_);
return "";
}
virtual string DebugString() const override {
return string("AutoVar(") + sym_ + ")";
}
protected:
AutoVar(CommandEvaluator* ce, const char* sym) : ce_(ce), sym_(sym) {}
virtual ~AutoVar() = default;
CommandEvaluator* ce_;
const char* sym_;
};
#define DECLARE_AUTO_VAR_CLASS(name) \
class name : public AutoVar { \
public: \
name(CommandEvaluator* ce, const char* sym) : AutoVar(ce, sym) {} \
virtual ~name() = default; \
virtual void Eval(Evaluator* ev, string* s) const override; \
}
DECLARE_AUTO_VAR_CLASS(AutoAtVar);
DECLARE_AUTO_VAR_CLASS(AutoLessVar);
DECLARE_AUTO_VAR_CLASS(AutoHatVar);
DECLARE_AUTO_VAR_CLASS(AutoPlusVar);
DECLARE_AUTO_VAR_CLASS(AutoStarVar);
DECLARE_AUTO_VAR_CLASS(AutoNotImplementedVar);
class AutoSuffixDVar : public AutoVar {
public:
AutoSuffixDVar(CommandEvaluator* ce, const char* sym, Var* wrapped)
: AutoVar(ce, sym), wrapped_(wrapped) {}
virtual ~AutoSuffixDVar() = default;
virtual void Eval(Evaluator* ev, string* s) const override;
private:
Var* wrapped_;
};
class AutoSuffixFVar : public AutoVar {
public:
AutoSuffixFVar(CommandEvaluator* ce, const char* sym, Var* wrapped)
: AutoVar(ce, sym), wrapped_(wrapped) {}
virtual ~AutoSuffixFVar() = default;
virtual void Eval(Evaluator* ev, string* s) const override;
private:
Var* wrapped_;
};
void AutoAtVar::Eval(Evaluator*, string* s) const {
*s += ce_->current_dep_node()->output.str();
}
void AutoLessVar::Eval(Evaluator*, string* s) const {
auto& ai = ce_->current_dep_node()->actual_inputs;
if (!ai.empty())
*s += ai[0].str();
}
void AutoHatVar::Eval(Evaluator*, string* s) const {
unordered_set<StringPiece> seen;
WordWriter ww(s);
for (Symbol ai : ce_->current_dep_node()->actual_inputs) {
if (seen.insert(ai.str()).second)
ww.Write(ai.str());
}
}
void AutoPlusVar::Eval(Evaluator*, string* s) const {
WordWriter ww(s);
for (Symbol ai : ce_->current_dep_node()->actual_inputs) {
ww.Write(ai.str());
}
}
void AutoStarVar::Eval(Evaluator*, string* s) const {
const DepNode* n = ce_->current_dep_node();
if (!n->output_pattern.IsValid())
return;
Pattern pat(n->output_pattern.str());
pat.Stem(n->output.str()).AppendToString(s);
}
void AutoNotImplementedVar::Eval(Evaluator* ev, string*) const {
ev->Error(StringPrintf("Automatic variable `$%s' isn't supported yet", sym_));
}
void AutoSuffixDVar::Eval(Evaluator* ev, string* s) const {
string buf;
wrapped_->Eval(ev, &buf);
WordWriter ww(s);
for (StringPiece tok : WordScanner(buf)) {
ww.Write(Dirname(tok));
}
}
void AutoSuffixFVar::Eval(Evaluator* ev, string* s) const {
string buf;
wrapped_->Eval(ev, &buf);
WordWriter ww(s);
for (StringPiece tok : WordScanner(buf)) {
ww.Write(Basename(tok));
}
}
void ParseCommandPrefixes(StringPiece* s, bool* echo, bool* ignore_error) {
*s = TrimLeftSpace(*s);
while (true) {
char c = s->get(0);
if (c == '@') {
*echo = false;
} else if (c == '-') {
*ignore_error = true;
} else if (c == '+') {
// ignore recursion marker
} else {
break;
}
*s = TrimLeftSpace(s->substr(1));
}
}
} // namespace
CommandEvaluator::CommandEvaluator(Evaluator* ev) : ev_(ev) {
#define INSERT_AUTO_VAR(name, sym) \
do { \
Var* v = new name(this, sym); \
Intern(sym).SetGlobalVar(v); \
Intern(sym "D").SetGlobalVar(new AutoSuffixDVar(this, sym "D", v)); \
Intern(sym "F").SetGlobalVar(new AutoSuffixFVar(this, sym "F", v)); \
} while (0)
INSERT_AUTO_VAR(AutoAtVar, "@");
INSERT_AUTO_VAR(AutoLessVar, "<");
INSERT_AUTO_VAR(AutoHatVar, "^");
INSERT_AUTO_VAR(AutoPlusVar, "+");
INSERT_AUTO_VAR(AutoStarVar, "*");
// TODO: Implement them.
INSERT_AUTO_VAR(AutoNotImplementedVar, "%");
INSERT_AUTO_VAR(AutoNotImplementedVar, "?");
INSERT_AUTO_VAR(AutoNotImplementedVar, "|");
}
void CommandEvaluator::Eval(DepNode* n, vector<Command*>* commands) {
ev_->set_loc(n->loc);
ev_->set_current_scope(n->rule_vars);
current_dep_node_ = n;
for (Value* v : n->cmds) {
const string&& cmds_buf = v->Eval(ev_);
StringPiece cmds = cmds_buf;
bool global_echo = !g_flags.is_silent_mode;
bool global_ignore_error = false;
ParseCommandPrefixes(&cmds, &global_echo, &global_ignore_error);
if (cmds == "")
continue;
while (true) {
size_t lf_cnt;
size_t index = FindEndOfLine(cmds, 0, &lf_cnt);
if (index == cmds.size())
index = string::npos;
StringPiece cmd = TrimLeftSpace(cmds.substr(0, index));
cmds = cmds.substr(index + 1);
bool echo = global_echo;
bool ignore_error = global_ignore_error;
ParseCommandPrefixes(&cmd, &echo, &ignore_error);
if (!cmd.empty()) {
Command* command = new Command(n->output);
command->cmd = cmd.as_string();
command->echo = echo;
command->ignore_error = ignore_error;
commands->push_back(command);
}
if (index == string::npos)
break;
}
continue;
}
if (!ev_->delayed_output_commands().empty()) {
vector<Command*> output_commands;
for (const string& cmd : ev_->delayed_output_commands()) {
Command* c = new Command(n->output);
c->cmd = cmd;
c->echo = false;
c->ignore_error = false;
output_commands.push_back(c);
}
// Prepend |output_commands|.
commands->swap(output_commands);
copy(output_commands.begin(), output_commands.end(),
back_inserter(*commands));
ev_->clear_delayed_output_commands();
}
ev_->set_current_scope(NULL);
}
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