Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/file_template.cc

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "tools/gn/file_template.h"
-
-#include "tools/gn/filesystem_utils.h"
-
-const char FileTemplate::kSource[] = "{{source}}";
-const char FileTemplate::kSourceNamePart[] = "{{source_name_part}}";
-
-FileTemplate::FileTemplate(const Value& t, Err* err) {
-  ParseInput(t, err);
-}
-
-FileTemplate::FileTemplate(const std::vector<std::string>& t) {
-  for (size_t i = 0; i < t.size(); i++)
-    ParseOneTemplateString(t[i]);
-}
-
-FileTemplate::~FileTemplate() {
-}
-
-void FileTemplate::Apply(const Value& sources,
-                         const ParseNode* origin,
-                         std::vector<Value>* dest,
-                         Err* err) const {
-  if (!sources.VerifyTypeIs(Value::LIST, err))
-    return;
-  dest->reserve(sources.list_value().size() * templates_.container().size());
-
-  // Temporary holding place, allocate outside to re-use- buffer.
-  std::vector<std::string> string_output;
-
-  const std::vector<Value>& sources_list = sources.list_value();
-  for (size_t i = 0; i < sources_list.size(); i++) {
-    if (!sources_list[i].VerifyTypeIs(Value::STRING, err))
-      return;
-
-    ApplyString(sources_list[i].string_value(), &string_output);
-    for (size_t out_i = 0; out_i < string_output.size(); out_i++)
-      dest->push_back(Value(origin, string_output[i]));
-  }
-}
-
-void FileTemplate::ApplyString(const std::string& str,
-                               std::vector<std::string>* output) const {
-  // Compute all substitutions needed so we can just do substitutions below.
-  // We skip the LITERAL one since that varies each time.
-  std::string subst[Subrange::NUM_TYPES];
-  if (types_required_[Subrange::SOURCE])
-    subst[Subrange::SOURCE] = str;
-  if (types_required_[Subrange::NAME_PART])
-    subst[Subrange::NAME_PART] = FindFilenameNoExtension(&str).as_string();
-
-  output->resize(templates_.container().size());
-  for (size_t template_i = 0;
-       template_i < templates_.container().size(); template_i++) {
-    const Template& t = templates_[template_i];
-    (*output)[template_i].clear();
-    for (size_t subrange_i = 0; subrange_i < t.container().size();
-         subrange_i++) {
-      if (t[subrange_i].type == Subrange::LITERAL)
-        (*output)[template_i].append(t[subrange_i].literal);
-      else
-        (*output)[template_i].append(subst[t[subrange_i].type]);
-    }
-  }
-}
-
-void FileTemplate::ParseInput(const Value& value, Err* err) {
-  switch (value.type()) {
-    case Value::STRING:
-      ParseOneTemplateString(value.string_value());
-      break;
-    case Value::LIST:
-      for (size_t i = 0; i < value.list_value().size(); i++) {
-        if (!value.list_value()[i].VerifyTypeIs(Value::STRING, err))
-          return;
-        ParseOneTemplateString(value.list_value()[i].string_value());
-      }
-      break;
-    default:
-      *err = Err(value, "File template must be a string or list.",
-                 "A sarcastic comment about your skills goes here.");
-  }
-}
-
-void FileTemplate::ParseOneTemplateString(const std::string& str) {
-  templates_.container().resize(templates_.container().size() + 1);
-  Template& t = templates_[templates_.container().size() - 1];
-
-  size_t cur = 0;
-  while (true) {
-    size_t next = str.find("{{", cur);
-
-    // Pick up everything from the previous spot to here as a literal.
-    if (next == std::string::npos) {
-      if (cur != str.size())
-        t.container().push_back(Subrange(Subrange::LITERAL, str.substr(cur)));
-      break;
-    } else if (next > cur) {
-      t.container().push_back(
-          Subrange(Subrange::LITERAL, str.substr(cur, next - cur)));
-    }
-
-    // Decode the template param.
-    if (str.compare(next, arraysize(kSource) - 1, kSource) == 0) {
-      t.container().push_back(Subrange(Subrange::SOURCE));
-      types_required_[Subrange::SOURCE] = true;
-      cur = next + arraysize(kSource) - 1;
-    } else if (str.compare(next, arraysize(kSourceNamePart) - 1,
-                           kSourceNamePart) == 0) {
-      t.container().push_back(Subrange(Subrange::NAME_PART));
-      types_required_[Subrange::NAME_PART] = true;
-      cur = next + arraysize(kSourceNamePart) - 1;
-    } else {
-      // If it's not a match, treat it like a one-char literal (this will be
-      // rare, so it's not worth the bother to add to the previous literal) so
-      // we can keep going.
-      t.container().push_back(Subrange(Subrange::LITERAL, "{"));
-      cur = next + 1;
-    }
-  }
-}