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-rw-r--r--src/libutil/error.cc257
1 files changed, 166 insertions, 91 deletions
diff --git a/src/libutil/error.cc b/src/libutil/error.cc
index a5571d4ec..0fad9ae42 100644
--- a/src/libutil/error.cc
+++ b/src/libutil/error.cc
@@ -2,9 +2,38 @@
#include <iostream>
#include <optional>
+#include "serialise.hh"
+#include <sstream>
-namespace nix
+namespace nix {
+
+
+const std::string nativeSystem = SYSTEM;
+
+// addPrefix is used for show-trace. Strings added with addPrefix
+// will print ahead of the error itself.
+BaseError & BaseError::addPrefix(const FormatOrString & fs)
+{
+ prefix_ = fs.s + prefix_;
+ return *this;
+}
+
+// c++ std::exception descendants must have a 'const char* what()' function.
+// This stringifies the error and caches it for use by what(), or similarly by msg().
+const string& BaseError::calcWhat() const
{
+ if (what_.has_value())
+ return *what_;
+ else {
+ err.name = sname();
+
+ std::ostringstream oss;
+ oss << err;
+ what_ = oss.str();
+
+ return *what_;
+ }
+}
std::optional<string> ErrorInfo::programName = std::nullopt;
@@ -15,132 +44,178 @@ std::ostream& operator<<(std::ostream &os, const hintformat &hf)
string showErrPos(const ErrPos &errPos)
{
- if (errPos.column > 0) {
- return fmt("(%1%:%2%)", errPos.lineNumber, errPos.column);
- } else {
- return fmt("(%1%)", errPos.lineNumber);
- };
+ if (errPos.line > 0) {
+ if (errPos.column > 0) {
+ return fmt("(%1%:%2%)", errPos.line, errPos.column);
+ } else {
+ return fmt("(%1%)", errPos.line);
+ }
+ }
+ else {
+ return "";
+ }
}
-void printCodeLines(const string &prefix, const NixCode &nixCode)
+// if nixCode contains lines of code, print them to the ostream, indicating the error column.
+void printCodeLines(std::ostream &out, const string &prefix, const NixCode &nixCode)
{
// previous line of code.
if (nixCode.prevLineOfCode.has_value()) {
- std::cout << fmt("%1% %|2$5d|| %3%",
- prefix,
- (nixCode.errPos.lineNumber - 1),
- *nixCode.prevLineOfCode)
- << std::endl;
+ out << std::endl
+ << fmt("%1% %|2$5d|| %3%",
+ prefix,
+ (nixCode.errPos.line - 1),
+ *nixCode.prevLineOfCode);
}
- // line of code containing the error.%2$+5d%
- std::cout << fmt("%1% %|2$5d|| %3%",
- prefix,
- (nixCode.errPos.lineNumber),
- nixCode.errLineOfCode)
- << std::endl;
-
- // error arrows for the column range.
- if (nixCode.errPos.column > 0) {
- int start = nixCode.errPos.column;
- std::string spaces;
- for (int i = 0; i < start; ++i) {
- spaces.append(" ");
+ if (nixCode.errLineOfCode.has_value()) {
+ // line of code containing the error.
+ out << std::endl
+ << fmt("%1% %|2$5d|| %3%",
+ prefix,
+ (nixCode.errPos.line),
+ *nixCode.errLineOfCode);
+ // error arrows for the column range.
+ if (nixCode.errPos.column > 0) {
+ int start = nixCode.errPos.column;
+ std::string spaces;
+ for (int i = 0; i < start; ++i) {
+ spaces.append(" ");
+ }
+
+ std::string arrows("^");
+
+ out << std::endl
+ << fmt("%1% |%2%" ANSI_RED "%3%" ANSI_NORMAL,
+ prefix,
+ spaces,
+ arrows);
}
-
- std::string arrows("^");
-
- std::cout << fmt("%1% |%2%" ANSI_RED "%3%" ANSI_NORMAL,
- prefix,
- spaces,
- arrows) << std::endl;
}
// next line of code.
if (nixCode.nextLineOfCode.has_value()) {
- std::cout << fmt("%1% %|2$5d|| %3%",
- prefix,
- (nixCode.errPos.lineNumber + 1),
- *nixCode.nextLineOfCode)
- << std::endl;
+ out << std::endl
+ << fmt("%1% %|2$5d|| %3%",
+ prefix,
+ (nixCode.errPos.line + 1),
+ *nixCode.nextLineOfCode);
}
}
-void printErrorInfo(const ErrorInfo &einfo)
+std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
{
- int errwidth = 80;
- string prefix = " ";
+ auto errwidth = std::max<size_t>(getWindowSize().second, 20);
+ string prefix = "";
string levelString;
switch (einfo.level) {
- case ErrLevel::elError: {
- levelString = ANSI_RED;
- levelString += "error:";
- levelString += ANSI_NORMAL;
- break;
- }
- case ErrLevel::elWarning: {
- levelString = ANSI_YELLOW;
- levelString += "warning:";
- levelString += ANSI_NORMAL;
- break;
- }
- default: {
- levelString = fmt("invalid error level: %1%", einfo.level);
- break;
- }
+ case Verbosity::lvlError: {
+ levelString = ANSI_RED;
+ levelString += "error:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ case Verbosity::lvlWarn: {
+ levelString = ANSI_YELLOW;
+ levelString += "warning:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ case Verbosity::lvlInfo: {
+ levelString = ANSI_GREEN;
+ levelString += "info:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ case Verbosity::lvlTalkative: {
+ levelString = ANSI_GREEN;
+ levelString += "talk:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ case Verbosity::lvlChatty: {
+ levelString = ANSI_GREEN;
+ levelString += "chat:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ case Verbosity::lvlVomit: {
+ levelString = ANSI_GREEN;
+ levelString += "vomit:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ case Verbosity::lvlDebug: {
+ levelString = ANSI_YELLOW;
+ levelString += "debug:";
+ levelString += ANSI_NORMAL;
+ break;
+ }
+ default: {
+ levelString = fmt("invalid error level: %1%", einfo.level);
+ break;
+ }
}
- int ndl = prefix.length() + levelString.length() + 3 + einfo.name.length() + einfo.programName.value_or("").length();
- int dashwidth = ndl > (errwidth - 3) ? 3 : errwidth - ndl;
+ auto ndl = prefix.length() + levelString.length() + 3 + einfo.name.length() + einfo.programName.value_or("").length();
+ auto dashwidth = ndl > (errwidth - 3) ? 3 : errwidth - ndl;
- string dashes;
- for (int i = 0; i < dashwidth; ++i)
- dashes.append("-");
+ std::string dashes(dashwidth, '-');
// divider.
- std::cout << fmt("%1%%2%" ANSI_BLUE " %3% %4% %5% %6%" ANSI_NORMAL,
- prefix,
- levelString,
- "---",
- einfo.name,
- dashes,
- einfo.programName.value_or(""))
- << std::endl;
-
- // filename.
+ if (einfo.name != "")
+ out << fmt("%1%%2%" ANSI_BLUE " --- %3% %4% %5%" ANSI_NORMAL,
+ prefix,
+ levelString,
+ einfo.name,
+ dashes,
+ einfo.programName.value_or(""));
+ else
+ out << fmt("%1%%2%" ANSI_BLUE " -----%3% %4%" ANSI_NORMAL,
+ prefix,
+ levelString,
+ dashes,
+ einfo.programName.value_or(""));
+
+ bool nl = false; // intersperse newline between sections.
if (einfo.nixCode.has_value()) {
- if (einfo.nixCode->errPos.nixFile != "") {
- string eline = einfo.nixCode->errLineOfCode != ""
- ? string(" ") + showErrPos(einfo.nixCode->errPos)
- : "";
-
- std::cout << fmt("%1%in file: " ANSI_BLUE "%2%%3%" ANSI_NORMAL,
- prefix,
- einfo.nixCode->errPos.nixFile,
- eline) << std::endl;
- std::cout << prefix << std::endl;
+ if (einfo.nixCode->errPos.file != "") {
+ // filename, line, column.
+ out << std::endl << fmt("%1%in file: " ANSI_BLUE "%2% %3%" ANSI_NORMAL,
+ prefix,
+ einfo.nixCode->errPos.file,
+ showErrPos(einfo.nixCode->errPos));
} else {
- std::cout << fmt("%1%from command line argument", prefix) << std::endl;
- std::cout << prefix << std::endl;
+ out << std::endl << fmt("%1%from command line argument", prefix);
}
+ nl = true;
}
// description
- std::cout << prefix << einfo.description << std::endl;
- std::cout << prefix << std::endl;
+ if (einfo.description != "") {
+ if (nl)
+ out << std::endl << prefix;
+ out << std::endl << prefix << einfo.description;
+ nl = true;
+ }
// lines of code.
- if (einfo.nixCode->errLineOfCode != "") {
- printCodeLines(prefix, *einfo.nixCode);
- std::cout << prefix << std::endl;
+ if (einfo.nixCode.has_value() && einfo.nixCode->errLineOfCode.has_value()) {
+ if (nl)
+ out << std::endl << prefix;
+ printCodeLines(out, prefix, *einfo.nixCode);
+ nl = true;
}
// hint
if (einfo.hint.has_value()) {
- std::cout << prefix << *einfo.hint << std::endl;
- std::cout << prefix << std::endl;
+ if (nl)
+ out << std::endl << prefix;
+ out << std::endl << prefix << *einfo.hint;
+ nl = true;
}
-}
+ return out;
+}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 21:01:54 +0000