forked from lix-project/lix
220 lines
5.6 KiB
C++
220 lines
5.6 KiB
C++
#include "error.hh"
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#include <iostream>
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#include <optional>
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#include "serialise.hh"
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#include <sstream>
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namespace nix {
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const std::string nativeSystem = SYSTEM;
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BaseError & BaseError::addPrefix(const FormatOrString & fs)
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{
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prefix_ = fs.s + prefix_;
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return *this;
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}
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const string& BaseError::calcWhat() const
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{
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if (what_.has_value())
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return *what_;
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else {
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err.name = sname();
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std::ostringstream oss;
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oss << err;
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what_ = oss.str();
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return *what_;
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}
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}
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std::optional<string> ErrorInfo::programName = std::nullopt;
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std::ostream& operator<<(std::ostream &os, const hintformat &hf)
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{
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return os << hf.str();
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}
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string showErrPos(const ErrPos &errPos)
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{
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if (errPos.line > 0) {
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if (errPos.column > 0) {
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return fmt("(%1%:%2%)", errPos.line, errPos.column);
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} else {
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return fmt("(%1%)", errPos.line);
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}
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}
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else {
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return "";
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}
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}
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void printCodeLines(std::ostream &out, const string &prefix, const NixCode &nixCode)
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{
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// previous line of code.
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if (nixCode.prevLineOfCode.has_value()) {
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out << std::endl
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<< fmt("%1% %|2$5d|| %3%",
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prefix,
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(nixCode.errPos.line - 1),
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*nixCode.prevLineOfCode);
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}
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if (nixCode.errLineOfCode.has_value()) {
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// line of code containing the error.
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out << std::endl
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<< fmt("%1% %|2$5d|| %3%",
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prefix,
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(nixCode.errPos.line),
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*nixCode.errLineOfCode);
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// error arrows for the column range.
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if (nixCode.errPos.column > 0) {
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int start = nixCode.errPos.column;
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std::string spaces;
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for (int i = 0; i < start; ++i) {
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spaces.append(" ");
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}
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std::string arrows("^");
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out << std::endl
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<< fmt("%1% |%2%" ANSI_RED "%3%" ANSI_NORMAL,
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prefix,
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spaces,
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arrows);
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}
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}
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// next line of code.
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if (nixCode.nextLineOfCode.has_value()) {
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out << std::endl
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<< fmt("%1% %|2$5d|| %3%",
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prefix,
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(nixCode.errPos.line + 1),
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*nixCode.nextLineOfCode);
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}
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}
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std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
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{
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int errwidth = 80;
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string prefix = "";
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string levelString;
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switch (einfo.level) {
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case Verbosity::lvlError: {
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levelString = ANSI_RED;
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levelString += "error:";
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levelString += ANSI_NORMAL;
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break;
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}
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case Verbosity::lvlWarn: {
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levelString = ANSI_YELLOW;
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levelString += "warning:";
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levelString += ANSI_NORMAL;
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break;
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}
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case Verbosity::lvlInfo: {
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levelString = ANSI_GREEN;
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levelString += "info:";
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levelString += ANSI_NORMAL;
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break;
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}
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case Verbosity::lvlTalkative: {
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levelString = ANSI_GREEN;
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levelString += "talk:";
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levelString += ANSI_NORMAL;
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break;
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}
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case Verbosity::lvlChatty: {
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levelString = ANSI_GREEN;
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levelString += "chat:";
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levelString += ANSI_NORMAL;
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break;
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}
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case Verbosity::lvlVomit: {
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levelString = ANSI_GREEN;
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levelString += "vomit:";
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levelString += ANSI_NORMAL;
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break;
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}
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case Verbosity::lvlDebug: {
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levelString = ANSI_YELLOW;
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levelString += "debug:";
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levelString += ANSI_NORMAL;
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break;
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}
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default: {
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levelString = fmt("invalid error level: %1%", einfo.level);
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break;
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}
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}
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int ndl = prefix.length() + levelString.length() + 3 + einfo.name.length() + einfo.programName.value_or("").length();
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int dashwidth = ndl > (errwidth - 3) ? 3 : errwidth - ndl;
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string dashes;
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for (int i = 0; i < dashwidth; ++i)
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dashes.append("-");
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// divider.
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if (einfo.name != "")
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out << fmt("%1%%2%" ANSI_BLUE " --- %3% %4% %5%" ANSI_NORMAL,
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prefix,
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levelString,
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einfo.name,
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dashes,
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einfo.programName.value_or(""));
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else
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out << fmt("%1%%2%" ANSI_BLUE " -----%3% %4%" ANSI_NORMAL,
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prefix,
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levelString,
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dashes,
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einfo.programName.value_or(""));
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bool nl = false; // intersperse newline between sections.
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if (einfo.nixCode.has_value()) {
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if (einfo.nixCode->errPos.file != "") {
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// filename, line, column.
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out << std::endl << fmt("%1%in file: " ANSI_BLUE "%2% %3%" ANSI_NORMAL,
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prefix,
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einfo.nixCode->errPos.file,
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showErrPos(einfo.nixCode->errPos));
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} else {
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out << std::endl << fmt("%1%from command line argument", prefix);
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}
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nl = true;
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}
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// description
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if (einfo.description != "") {
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if (nl)
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out << std::endl << prefix;
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out << std::endl << prefix << einfo.description;
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nl = true;
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}
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// lines of code.
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if (einfo.nixCode.has_value() && einfo.nixCode->errLineOfCode.has_value()) {
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if (nl)
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out << std::endl << prefix;
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printCodeLines(out, prefix, *einfo.nixCode);
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nl = true;
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}
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// hint
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if (einfo.hint.has_value()) {
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if (nl)
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out << std::endl << prefix;
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out << std::endl << prefix << *einfo.hint;
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nl = true;
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}
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return out;
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}
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}
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