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print LOC for stdin, string args

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This commit is contained in:
Ben Burdette 2020-05-20 22:18:26 -06:00
parent 85ce455b85
commit 6a420d672c
6 changed files with 97 additions and 36 deletions
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2
src/libexpr/attr-path.cc
View file

@ -121,7 +121,7 @@ Pos findDerivationFilename(EvalState & state, Value & v, std::string what)
Symbol file = state.symbols.create(filename);
return { file, lineno, 0 };
return { foFile, file, lineno, 0 };
}

2
src/libexpr/eval.hh
View file

@ -249,7 +249,7 @@ private:
friend struct ExprAttrs;
friend struct ExprLet;
Expr * parse(const char * text, const Path & path,
Expr * parse(const char * text, FileOrigin origin, const Path & path,
const Path & basePath, StaticEnv & staticEnv);
public:

7
src/libexpr/nixexpr.hh
View file

@ -24,11 +24,12 @@ MakeError(RestrictedPathError, Error);
struct Pos
{
FileOrigin origin;
Symbol file;
unsigned int line, column;
Pos() : line(0), column(0) { };
Pos(const Symbol & file, unsigned int line, unsigned int column)
: file(file), line(line), column(column) { };
Pos() : origin(foString), line(0), column(0) { };
Pos(FileOrigin origin, const Symbol & file, unsigned int line, unsigned int column)
: origin(origin), file(file), line(line), column(column) { };
operator bool() const
{
return line != 0;

27
src/libexpr/parser.y
View file

@ -30,7 +30,8 @@ namespace nix {
SymbolTable & symbols;
Expr * result;
Path basePath;
Symbol path;
Symbol file;
FileOrigin origin;
ErrorInfo error;
Symbol sLetBody;
ParseData(EvalState & state)
@ -250,7 +251,7 @@ static Expr * stripIndentation(const Pos & pos, SymbolTable & symbols, vector<Ex
static inline Pos makeCurPos(const YYLTYPE & loc, ParseData * data)
{
return Pos(data->path, loc.first_line, loc.first_column);
return Pos(data->origin, data->file, loc.first_line, loc.first_column);
}
#define CUR_POS makeCurPos(*yylocp, data)
@ -576,13 +577,24 @@ formal
namespace nix {
Expr * EvalState::parse(const char * text,
Expr * EvalState::parse(const char * text, FileOrigin origin,
const Path & path, const Path & basePath, StaticEnv & staticEnv)
{
yyscan_t scanner;
ParseData data(*this);
data.origin = origin;
switch (origin) {
case foFile:
data.file = data.symbols.create(path);
break;
case foStdin:
case foString:
data.file = data.symbols.create(text);
break;
default:
throw Error("invalid FileOrigin in parse");
}
data.basePath = basePath;
data.path = data.symbols.create(path);
yylex_init(&scanner);
yy_scan_string(text, scanner);
@ -632,13 +644,13 @@ Expr * EvalState::parseExprFromFile(const Path & path)
Expr * EvalState::parseExprFromFile(const Path & path, StaticEnv & staticEnv)
{
return parse(readFile(path).c_str(), path, dirOf(path), staticEnv);
return parse(readFile(path).c_str(), foFile, path, dirOf(path), staticEnv);
}
Expr * EvalState::parseExprFromString(std::string_view s, const Path & basePath, StaticEnv & staticEnv)
{
return parse(s.data(), "(string)", basePath, staticEnv);
return parse(s.data(), foString, "", basePath, staticEnv);
}
@ -651,7 +663,8 @@ Expr * EvalState::parseExprFromString(std::string_view s, const Path & basePath)
Expr * EvalState::parseStdin()
{
//Activity act(*logger, lvlTalkative, format("parsing standard input"));
return parseExprFromString(drainFD(0), absPath("."));
// return parseExprFromString(foStdin, drainFD(0), absPath("."));
return parse(drainFD(0).data(), foStdin, "", absPath("."), staticBaseEnv);
}

50
src/libutil/error.cc
View file

@ -59,16 +59,13 @@ void getCodeLines(NixCode &nixCode)
return;
// check this magic value!
if (nixCode.errPos.file == "(string)")
return;
if (nixCode.errPos.origin == foFile) {
try {
AutoCloseFD fd = open(nixCode.errPos.file.c_str(), O_RDONLY | O_CLOEXEC);
if (!fd)
throw SysError("opening file '%1%'", nixCode.errPos.file);
// count the newlines.
int count = 0;
string line;
int pl = nixCode.errPos.line - 1;
@ -96,6 +93,35 @@ void getCodeLines(NixCode &nixCode)
catch (std::exception &e) {
printError("error reading nix file: %s\n%s", nixCode.errPos.file, e.what());
}
} else {
std::istringstream iss(nixCode.errPos.file);
// count the newlines.
int count = 0;
string line;
int pl = nixCode.errPos.line - 1;
do
{
std::getline(iss, line);
// std::cout << "getline result: " << std::getline(iss, line) << std::endl;
++count;
if (count < pl)
{
;
}
else if (count == pl) {
nixCode.prevLineOfCode = line;
} else if (count == pl + 1) {
nixCode.errLineOfCode = line;
} else if (count == pl + 2) {
nixCode.nextLineOfCode = line;
break;
}
if (!iss.good())
break;
} while (true);
}
}
@ -225,15 +251,27 @@ std::ostream& operator<<(std::ostream &out, const ErrorInfo &einfo)
// filename, line, column.
if (einfo.nixCode.has_value()) {
if (einfo.nixCode->errPos.file != "") {
switch (einfo.nixCode->errPos.origin) {
case foFile: {
out << fmt("%1%in file: " ANSI_BLUE "%2% %3%" ANSI_NORMAL,
prefix,
einfo.nixCode->errPos.file,
showErrPos(einfo.nixCode->errPos)) << std::endl;
out << prefix << std::endl;
} else {
break;
}
case foString: {
out << fmt("%1%from command line argument", prefix) << std::endl;
out << prefix << std::endl;
break;
}
case foStdin: {
out << fmt("%1%from stdin", prefix) << std::endl;
out << prefix << std::endl;
break;
}
default:
throw Error("invalid FileOrigin in errPos");
}
}

9
src/libutil/error.hh
View file

@ -32,10 +32,18 @@ typedef enum {
lvlVomit
} Verbosity;
typedef enum {
foFile,
foStdin,
foString
} FileOrigin;
struct ErrPos {
int line = 0;
int column = 0;
string file;
FileOrigin origin;
operator bool() const
{
@ -45,6 +53,7 @@ struct ErrPos {
template <class P>
ErrPos& operator=(const P &pos)
{
origin = pos.origin;
line = pos.line;
column = pos.column;
file = pos.file;