61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
/*
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Copyright (c) 2014 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include <utility>
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#include <fstream>
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#include <string>
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#include "util/sstream.h"
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#include "util/lean_path.h"
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#include "frontends/lean/scanner.h"
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namespace lean {
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void display_deps(environment const & env, std::ostream & out, char const * fname) {
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name import("import");
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name period(".");
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std::ifstream in(fname);
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if (in.bad() || in.fail())
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throw exception(sstream() << "failed to open file '" << fname << "'");
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scanner s(in, fname);
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optional<unsigned> k;
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std::string base = dirname(fname);
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bool import_prefix = false;
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bool import_args = false;
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while (true) {
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scanner::token_kind t = scanner::token_kind::Identifier;
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try {
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t = s.scan(env);
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} catch (exception &) {
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continue;
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}
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if (t == scanner::token_kind::Eof) {
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return;
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} else if (t == scanner::token_kind::CommandKeyword && s.get_token_info().value() == import) {
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k = optional<unsigned>();
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import_prefix = true;
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} else if (import_prefix && t == scanner::token_kind::Keyword && s.get_token_info().value() == period) {
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if (!k)
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k = 0;
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else
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k = *k + 1;
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} else if ((import_prefix || import_args) && t == scanner::token_kind::Identifier) {
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import_args = true;
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std::string m_name = find_file(base, k, name_to_file(s.get_name_val()), {".lean", ".olean", ".lua"});
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int last_idx = m_name.find_last_of(".");
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std::string rawname = m_name.substr(0, last_idx);
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std::string ext = m_name.substr(last_idx);
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if (ext == ".lean")
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m_name = rawname + ".olean";
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display_path(out, m_name);
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k = optional<unsigned>();
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import_prefix = true;
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out << "\n";
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} else {
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import_args = false;
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import_prefix = false;
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}
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}
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}
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}
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