86 lines
1.9 KiB
C++
86 lines
1.9 KiB
C++
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#include <cstdio>
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#include <cstdlib>
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#include <string>
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#include <iostream>
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#include <sstream>
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#include <fstream>
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std::string X = "$Format:%h by %cn on %ci$";
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std::string derive_format(std::string kwformat)
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{
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if(kwformat[0] != '$' || kwformat[1] != 'F' || kwformat[kwformat.length() - 1] != '$') {
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std::cerr << "Bad keyword format '" << kwformat << "'" << std::endl;
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exit(1);
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}
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return "--pretty=f" + kwformat.substr(2, kwformat.length() - 3);
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}
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std::string shellquote(std::string arg)
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{
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std::ostringstream x;
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x << "'";
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for(size_t i = 0; i < arg.length(); i++) {
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if(arg[i] == '\'')
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x << "\\'";
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else
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x << arg[i];
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}
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x << "'";
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return x.str();
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}
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std::string runlog(std::string logformat)
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{
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std::string command = "git log " + shellquote(logformat) + " -1";
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std::string retval;
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int r;
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char buf[4096] = {0};
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FILE* out = popen(command.c_str(), "r");
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if(!out) {
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std::cerr << "Can't invoke git to get the version" << std::endl;
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exit(1);
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}
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while((r = fread(buf, 1, 4095, out)) > 0) {
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buf[r] = 0;
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retval = retval + buf;
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}
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if(ferror(out)) {
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std::cerr << "Error reading git version output" << std::endl;
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exit(1);
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}
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pclose(out);
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return retval;
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}
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std::string get_main_version()
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{
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std::ifstream x("VERSION");
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if(!x) {
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std::cerr << "Error reading main version" << std::endl;
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exit(1);
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}
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std::string out;
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std::getline(x, out);
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if(out == "") {
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std::cerr << "Error reading main version" << std::endl;
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exit(1);
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}
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return out;
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}
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int main()
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{
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std::string gitversion;
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std::string mainversion = get_main_version();
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if(X[0] == '$') {
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std::string logformat = derive_format(X);
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gitversion = runlog(logformat);
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} else
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gitversion = X;
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std::cout << "#include <string>" << std::endl;
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std::cout << "std::string lsnes_git_revision = \"" << gitversion << "\";" << std::endl;
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std::cout << "std::string lsnes_version = \"" << mainversion << "\";" << std::endl;
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return 0;
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}
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