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// Copyright 2016 The Bazel Authors. 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.
#include "src/main/cpp/workspace_layout.h"
#include <assert.h>
#include <unistd.h> // access
#include "src/main/cpp/blaze_util_platform.h"
#include "src/main/cpp/util/file.h"
namespace blaze {
using std::string;
using std::vector;
static const char kWorkspaceMarker[] = "WORKSPACE";
string WorkspaceLayout::GetOutputRoot() {
return blaze::GetOutputRoot();
}
bool WorkspaceLayout::InWorkspace(const string &workspace) {
return access(
blaze_util::JoinPath(workspace, kWorkspaceMarker).c_str(), F_OK) == 0;
}
string WorkspaceLayout::GetWorkspace(const string &cwd) {
assert(!cwd.empty());
string workspace = cwd;
do {
if (InWorkspace(workspace)) {
return workspace;
}
workspace = blaze_util::Dirname(workspace);
} while (!workspace.empty() && workspace != "/");
return "";
}
string WorkspaceLayout::RcBasename() {
return ".bazelrc";
}
static string FindDepotBlazerc(const string& workspace) {
// Package semantics are ignored here, but that's acceptable because
// blaze.blazerc is a configuration file.
vector<string> candidates;
WorkspaceLayout::WorkspaceRcFileSearchPath(&candidates);
for (const auto& candidate : candidates) {
string blazerc = blaze_util::JoinPath(workspace, candidate);
if (!access(blazerc.c_str(), R_OK)) {
return blazerc;
}
}
return "";
}
static string FindAlongsideBinaryBlazerc(const string& cwd,
const string& arg0) {
string path = arg0[0] == '/' ? arg0 : blaze_util::JoinPath(cwd, arg0);
string base = blaze_util::Basename(arg0);
string binary_blazerc_path = path + "." + base + "rc";
if (!access(binary_blazerc_path.c_str(), R_OK)) {
return binary_blazerc_path;
}
return "";
}
static string FindSystemWideBlazerc() {
string path = "/etc/bazel.bazelrc";
if (!access(path.c_str(), R_OK)) {
return path;
}
return "";
}
void WorkspaceLayout::FindCandidateBlazercPaths(
const string& workspace, const string& cwd, const vector<string>& args,
std::vector<string>* result) {
result->push_back(FindDepotBlazerc(workspace));
result->push_back(FindAlongsideBinaryBlazerc(cwd, args[0]));
result->push_back(FindSystemWideBlazerc());
}
void WorkspaceLayout::WorkspaceRcFileSearchPath(
vector<string>* candidates) {
candidates->push_back("tools/bazel.rc");
}
bool WorkspaceLayout::WorkspaceRelativizeRcFilePath(const string &workspace,
string *path_fragment) {
// Strip off the "%workspace%/" prefix and prepend the true workspace path.
// In theory this could use alternate search paths for blazerc files.
path_fragment->assign(
blaze_util::JoinPath(workspace,
path_fragment->substr(WorkspacePrefixLength)));
return true;
}
} // namespace blaze
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