wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-06-26 11:41:15 +02:00
Code Activity

Combine AbstractPos, PosAdapter, and Pos

Browse source 
Also move `SourcePath` into `libutil`.

These changes allow `error.hh` and `error.cc` to access source path and
position information, which we can use to produce better error messages
(for example, we could consider omitting filenames when two or more
consecutive stack frames originate from the same file).
This commit is contained in:
Rebecca Turner 2023-12-18 13:14:42 -08:00
parent 6a243e5ed2
commit 4feb7d9f71
No known key found for this signature in database
30 changed files with 561 additions and 489 deletions
Download patch file Download diff file Expand all files Collapse all files

55
src/libutil/error.cc
View file

@ -2,6 +2,7 @@
#include "environment-variables.hh"
#include "signals.hh"
#include "terminal.hh"
#include "position.hh"
#include <iostream>
#include <optional>
@ -10,7 +11,7 @@
namespace nix {
void BaseError::addTrace(std::shared_ptr<AbstractPos> && e, hintformat hint, bool frame)
void BaseError::addTrace(std::shared_ptr<Pos> && e, hintformat hint, bool frame)
{
err.traces.push_front(Trace { .pos = std::move(e), .hint = hint, .frame = frame });
}
@ -41,15 +42,6 @@ std::ostream & operator <<(std::ostream & os, const hintformat & hf)
return os << hf.str();
}
std::ostream & operator <<(std::ostream & str, const AbstractPos & pos)
{
pos.print(str);
str << ":" << pos.line;
if (pos.column > 0)
str << ":" << pos.column;
return str;
}
/**
* An arbitrarily defined value comparison for the purpose of using traces in the key of a sorted container.
*/
@ -76,49 +68,10 @@ inline bool operator> (const Trace& lhs, const Trace& rhs) { return rhs < lhs; }
inline bool operator<=(const Trace& lhs, const Trace& rhs) { return !(lhs > rhs); }
inline bool operator>=(const Trace& lhs, const Trace& rhs) { return !(lhs < rhs); }
std::optional<LinesOfCode> AbstractPos::getCodeLines() const
{
if (line == 0)
return std::nullopt;
if (auto source = getSource()) {
std::istringstream iss(*source);
// count the newlines.
int count = 0;
std::string curLine;
int pl = line - 1;
LinesOfCode loc;
do {
std::getline(iss, curLine);
++count;
if (count < pl)
;
else if (count == pl) {
loc.prevLineOfCode = curLine;
} else if (count == pl + 1) {
loc.errLineOfCode = curLine;
} else if (count == pl + 2) {
loc.nextLineOfCode = curLine;
break;
}
if (!iss.good())
break;
} while (true);
return loc;
}
return std::nullopt;
}
// print lines of code to the ostream, indicating the error column.
void printCodeLines(std::ostream & out,
const std::string & prefix,
const AbstractPos & errPos,
const Pos & errPos,
const LinesOfCode & loc)
{
// previous line of code.
@ -196,7 +149,7 @@ static bool printUnknownLocations = getEnv("_NIX_EVAL_SHOW_UNKNOWN_LOCATIONS").h
*
* @return true if a position was printed.
*/
static bool printPosMaybe(std::ostream & oss, std::string_view indent, const std::shared_ptr<AbstractPos> & pos) {
static bool printPosMaybe(std::ostream & oss, std::string_view indent, const std::shared_ptr<Pos> & pos) {
bool hasPos = pos && *pos;
if (hasPos) {
oss << indent << ANSI_BLUE << "at " ANSI_WARNING << *pos << ANSI_NORMAL << ":";