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authorBent Bisballe Nyeng <deva@aasimon.org>2021-06-11 21:22:21 +0200
committerBent Bisballe Nyeng <deva@aasimon.org>2021-06-11 21:22:21 +0200
commit6e3070181fadbe47511b52c12af5e1409a9a70b0 (patch)
tree12b7c080c28ecae3fcc344dccbeaa0c5f20dccbb /task.cc
parent799921f0b1f5dcaf8dd2aa2f40adaf8c8490affc (diff)
Refactor at 4'o clock
Diffstat (limited to 'task.cc')
-rw-r--r--task.cc199
1 files changed, 199 insertions, 0 deletions
diff --git a/task.cc b/task.cc
new file mode 100644
index 0000000..0b4240f
--- /dev/null
+++ b/task.cc
@@ -0,0 +1,199 @@
+#include "task.h"
+
+#include <iostream>
+#include <fstream>
+
+#include "libcppbuild.h"
+#include "settings.h"
+
+namespace
+{
+std::string readFile(const std::string &fileName)
+{
+ std::ifstream ifs(fileName.c_str(), std::ios::in | std::ios::binary | std::ios::ate);
+
+ std::ifstream::pos_type fileSize = ifs.tellg();
+ ifs.seekg(0, std::ios::beg);
+
+ std::vector<char> bytes(fileSize);
+ ifs.read(bytes.data(), fileSize);
+
+ return std::string(bytes.data(), fileSize);
+}
+
+std::vector<std::string> readDeps(const std::string& depFile)
+{
+ if(!std::filesystem::exists(depFile))
+ {
+ return {};
+ }
+
+ auto str = readFile(depFile);
+
+ std::vector<std::string> output;
+ std::string tmp;
+ bool start{false};
+ bool in_whitespace{false};
+ for(const auto& c : str)
+ {
+ if(c == '\\' || c == '\n')
+ {
+ continue;
+ }
+
+ if(c == ':')
+ {
+ start = true;
+ continue;
+ }
+
+ if(!start)
+ {
+ continue;
+ }
+
+ if(c == ' ' || c == '\t')
+ {
+ if(in_whitespace)
+ {
+ continue;
+ }
+
+ if(!tmp.empty())
+ {
+ output.push_back(tmp);
+ }
+ tmp.clear();
+ in_whitespace = true;
+ }
+ else
+ {
+ in_whitespace = false;
+ tmp += c;
+ }
+ }
+
+ if(!tmp.empty())
+ {
+ output.push_back(tmp);
+ }
+
+ return output;
+}
+} // namespace ::
+
+Task::Task(const BuildConfiguration& config, const Settings& settings,
+ const std::string& source)
+{
+ sourceFile = source;
+ targetFile = settings.builddir / sourceFile.stem();
+ targetFile += ".o";
+ depsFile = settings.builddir / sourceFile.stem();
+ depsFile += ".d";
+}
+
+void Task::start()
+{
+ future =
+ std::async(std::launch::async,
+ [&]()
+ {
+ if(!std::filesystem::exists(sourceFile))
+ {
+ std::cout << "Missing source file: " << std::string(sourceFile) << "\n";
+ return 1;
+ }
+
+ bool recompile{false};
+
+ if(!recompile &&
+ !std::filesystem::exists(targetFile))
+ {
+ recompile = true;
+ std::cout << "Missing targetFile\n";
+ }
+
+ if(!recompile &&
+ !std::filesystem::exists(depsFile))
+ {
+ recompile = true;
+ std::cout << "Missing depsFile\n";
+ }
+
+ if(!recompile &&
+ std::filesystem::last_write_time(sourceFile) >
+ std::filesystem::last_write_time(depsFile))
+ {
+ recompile = true;
+ std::cout << "The sourceFile newer than depsFile\n";
+ }
+
+ if(!recompile)
+ {
+ auto depList = readDeps(depsFile);
+ for(const auto& dep : depList)
+ {
+ if(!std::filesystem::exists(dep) ||
+ std::filesystem::last_write_time(targetFile) <
+ std::filesystem::last_write_time(dep))
+ {
+ recompile = true;
+ std::cout << "The targetFile older than dep\n";
+ break;
+ }
+ }
+ }
+
+ if(!recompile &&
+ std::filesystem::last_write_time(sourceFile) >
+ std::filesystem::last_write_time(targetFile))
+ {
+ recompile = true;
+ std::cout << "The targetFile older than sourceFile\n";
+ }
+
+ if(recompile)
+ {
+ std::string cmd =
+ "g++ -MMD -c " + std::string(sourceFile) +
+ " -o " + std::string(targetFile);
+ std::cout << cmd << "\n";
+
+ if(system(cmd.data()))
+ {
+ return 1;
+ }
+ return 0;
+ }
+
+ return 0;
+ });
+}
+
+int Task::wait()
+{
+ future.wait();
+ return future.get();
+}
+
+int Task::clean()
+{
+ if(std::filesystem::exists(targetFile))
+ {
+ std::cout << "Removing " << std::string(targetFile) << "\n";
+ std::filesystem::remove(targetFile);
+ }
+
+ if(std::filesystem::exists(depsFile))
+ {
+ std::cout << "Removing " << std::string(depsFile) << "\n";
+ std::filesystem::remove(depsFile);
+ }
+
+ return 0;
+}
+
+std::vector<std::string> Task::depends()
+{
+ return {};
+}