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/* Copyright 2017-present Facebook, Inc.
* Licensed under the Apache License, Version 2.0 */
#include "SCM.h"
#include "Mercurial.h"
#include "make_unique.h"
#include "watchman.h"
namespace watchman {
static const w_string_piece kGit{".git"};
static const w_string_piece kHg{".hg"};
SCM::~SCM() {}
SCM::SCM(w_string_piece rootPath, w_string_piece scmRoot)
: rootPath_(rootPath.asWString()), scmRoot_(scmRoot.asWString()) {}
const w_string& SCM::getRootPath() const {
return rootPath_;
}
const w_string& SCM::getSCMRoot() const {
return scmRoot_;
}
// Walks the paths from rootPath up to the root of the filesystem.
// At each level, checks to see if any of the candidate filenames
// in the provided candidates list exist. Returns the name of
// the first one it finds. If no candidates are found, returns
// nullptr.
w_string findFileInDirTree(
w_string_piece rootPath,
std::initializer_list<w_string_piece> candidates) {
w_check(rootPath.pathIsAbsolute(), "rootPath must be absolute");
while (true) {
for (auto& candidate : candidates) {
auto path = w_string::pathCat({rootPath, candidate});
if (w_path_exists(path.c_str())) {
return path;
}
}
auto next = rootPath.dirName();
if (next == rootPath) {
// We can't go any higher, so we couldn't find the
// requested path(s)
return nullptr;
}
rootPath = next;
}
}
std::unique_ptr<SCM> SCM::scmForPath(w_string_piece rootPath) {
auto scmRoot = findFileInDirTree(rootPath, {kHg, kGit});
if (!scmRoot) {
return nullptr;
}
auto base = scmRoot.piece().baseName();
if (base == kHg) {
return make_unique<Mercurial>(rootPath, scmRoot.piece().dirName());
}
if (base == kGit) {
}
return nullptr;
}
}
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