lix-project/lix
20
55
Fork 31
Code Issues 345 Code Review (Gerrit) Projects 3 Releases Wiki Activity

Merge remote-tracking branch 'origin/master' into flakes

Browse source
This commit is contained in:
Eelco Dolstra 2020-04-23 15:16:18 +02:00
parent c7af247bea c9d0cf7e02
commit ef4d3fc111
12 changed files with 416 additions and 65 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
.gitignore vendored
View file

@ -75,6 +75,8 @@ perl/Makefile.config
/src/nix-copy-closure/nix-copy-closure
/src/error-demo/error-demo
/src/build-remote/build-remote
# /tests/

66
src/error-demo/error-demo.cc Normal file
View file

@ -0,0 +1,66 @@
#include "error.hh"
#include "nixexpr.hh"
#include <iostream>
#include <optional>
int main()
{
using namespace nix;
// In each program where errors occur, this has to be set.
ErrorInfo::programName = std::optional("error-demo");
// Error in a program; no hint and no nix code.
printErrorInfo(
ErrorInfo { .level = elError,
.name = "name",
.description = "error description",
});
// Warning with name, description, and hint.
// The hintfmt function makes all the substituted text yellow.
printErrorInfo(
ErrorInfo { .level = elWarning,
.name = "name",
.description = "error description",
.hint = std::optional(
hintfmt("there was a %1%", "warning")),
});
// Warning with nix file, line number, column, and the lines of
// code where a warning occurred.
SymbolTable testTable;
auto problem_file = testTable.create("myfile.nix");
printErrorInfo(
ErrorInfo{
.level = elWarning,
.name = "warning name",
.description = "warning description",
.hint = hintfmt("this hint has %1% templated %2%!!", "yellow", "values"),
.nixCode = NixCode {
.errPos = Pos(problem_file, 40, 13),
.prevLineOfCode = std::nullopt,
.errLineOfCode = "this is the problem line of code",
.nextLineOfCode = std::nullopt
}});
// Error with previous and next lines of code.
printErrorInfo(
ErrorInfo{
.level = elError,
.name = "error name",
.description = "error description",
.hint = hintfmt("this hint has %1% templated %2%!!", "yellow", "values"),
.nixCode = NixCode {
.errPos = Pos(problem_file, 40, 13),
.prevLineOfCode = std::optional("previous line of code"),
.errLineOfCode = "this is the problem line of code",
.nextLineOfCode = std::optional("next line of code"),
}});
return 0;
}

12
src/error-demo/local.mk Normal file
View file

@ -0,0 +1,12 @@
programs += error-demo
error-demo_DIR := $(d)
error-demo_SOURCES := \
$(wildcard $(d)/*.cc) \
error-demo_CXXFLAGS += -I src/libutil -I src/libexpr
error-demo_LIBS = libutil libexpr
error-demo_LDFLAGS = -pthread $(SODIUM_LIBS) $(EDITLINE_LIBS) $(BOOST_LDFLAGS) -lboost_context -lboost_thread -lboost_system

4
src/libexpr/eval-inline.hh
View file

@ -57,7 +57,7 @@ inline void EvalState::forceAttrs(Value & v)
inline void EvalState::forceAttrs(Value & v, const Pos & pos)
{
forceValue(v);
forceValue(v, pos);
if (v.type != tAttrs)
throwTypeError("value is %1% while a set was expected, at %2%", v, pos);
}
@ -73,7 +73,7 @@ inline void EvalState::forceList(Value & v)
inline void EvalState::forceList(Value & v, const Pos & pos)
{
forceValue(v);
forceValue(v, pos);
if (!v.isList())
throwTypeError("value is %1% while a list was expected, at %2%", v, pos);
}

6
src/libexpr/eval.cc
View file

@ -1551,7 +1551,7 @@ NixFloat EvalState::forceFloat(Value & v, const Pos & pos)
bool EvalState::forceBool(Value & v, const Pos & pos)
{
forceValue(v);
forceValue(v, pos);
if (v.type != tBool)
throwTypeError("value is %1% while a Boolean was expected, at %2%", v, pos);
return v.boolean;
@ -1566,7 +1566,7 @@ bool EvalState::isFunctor(Value & fun)
void EvalState::forceFunction(Value & v, const Pos & pos)
{
forceValue(v);
forceValue(v, pos);
if (v.type != tLambda && v.type != tPrimOp && v.type != tPrimOpApp && !isFunctor(v))
throwTypeError("value is %1% while a function was expected, at %2%", v, pos);
}
@ -1643,7 +1643,7 @@ std::optional<string> EvalState::tryAttrsToString(const Pos & pos, Value & v,
string EvalState::coerceToString(const Pos & pos, Value & v, PathSet & context,
bool coerceMore, bool copyToStore)
{
forceValue(v);
forceValue(v, pos);
string s;

64
src/libexpr/primops.cc
View file

@ -242,7 +242,7 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
/* Return a string representing the type of the expression. */
static void prim_typeOf(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
string t;
switch (args[0]->type) {
case tInt: t = "int"; break;
@ -270,7 +270,7 @@ static void prim_typeOf(EvalState & state, const Pos & pos, Value * * args, Valu
/* Determine whether the argument is the null value. */
static void prim_isNull(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tNull);
}
@ -278,7 +278,7 @@ static void prim_isNull(EvalState & state, const Pos & pos, Value * * args, Valu
/* Determine whether the argument is a function. */
static void prim_isFunction(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
bool res;
switch (args[0]->type) {
case tLambda:
@ -297,21 +297,21 @@ static void prim_isFunction(EvalState & state, const Pos & pos, Value * * args,
/* Determine whether the argument is an integer. */
static void prim_isInt(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tInt);
}
/* Determine whether the argument is a float. */
static void prim_isFloat(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tFloat);
}
/* Determine whether the argument is a string. */
static void prim_isString(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tString);
}
@ -319,14 +319,14 @@ static void prim_isString(EvalState & state, const Pos & pos, Value * * args, Va
/* Determine whether the argument is a Boolean. */
static void prim_isBool(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tBool);
}
/* Determine whether the argument is a path. */
static void prim_isPath(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tPath);
}
@ -383,7 +383,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
args[0]->attrs->find(state.symbols.create("operator"));
if (op == args[0]->attrs->end())
throw EvalError(format("attribute 'operator' required, at %1%") % pos);
state.forceValue(*op->value);
state.forceValue(*op->value, pos);
/* Construct the closure by applying the operator to element of
`workSet', adding the result to `workSet', continuing until
@ -402,7 +402,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
e->attrs->find(state.symbols.create("key"));
if (key == e->attrs->end())
throw EvalError(format("attribute 'key' required, at %1%") % pos);
state.forceValue(*key->value);
state.forceValue(*key->value, pos);
if (!doneKeys.insert(key->value).second) continue;
res.push_back(e);
@ -414,7 +414,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
/* Add the values returned by the operator to the work set. */
for (unsigned int n = 0; n < call.listSize(); ++n) {
state.forceValue(*call.listElems()[n]);
state.forceValue(*call.listElems()[n], pos);
workSet.push_back(call.listElems()[n]);
}
}
@ -446,7 +446,7 @@ static void prim_throw(EvalState & state, const Pos & pos, Value * * args, Value
static void prim_addErrorContext(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
try {
state.forceValue(*args[1]);
state.forceValue(*args[1], pos);
v = *args[1];
} catch (Error & e) {
PathSet context;
@ -462,7 +462,7 @@ static void prim_tryEval(EvalState & state, const Pos & pos, Value * * args, Val
{
state.mkAttrs(v, 2);
try {
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
v.attrs->push_back(Attr(state.sValue, args[0]));
mkBool(*state.allocAttr(v, state.symbols.create("success")), true);
} catch (AssertionError & e) {
@ -484,8 +484,8 @@ static void prim_getEnv(EvalState & state, const Pos & pos, Value * * args, Valu
/* Evaluate the first argument, then return the second argument. */
static void prim_seq(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[1]);
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
v = *args[1];
}
@ -495,7 +495,7 @@ static void prim_seq(EvalState & state, const Pos & pos, Value * * args, Value &
static void prim_deepSeq(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValueDeep(*args[0]);
state.forceValue(*args[1]);
state.forceValue(*args[1], pos);
v = *args[1];
}
@ -504,12 +504,12 @@ static void prim_deepSeq(EvalState & state, const Pos & pos, Value * * args, Val
return the second expression. Useful for debugging. */
static void prim_trace(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
if (args[0]->type == tString)
printError(format("trace: %1%") % args[0]->string.s);
else
printError(format("trace: %1%") % *args[0]);
state.forceValue(*args[1]);
state.forceValue(*args[1], pos);
v = *args[1];
}
@ -600,7 +600,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
try {
if (ignoreNulls) {
state.forceValue(*i->value);
state.forceValue(*i->value, pos);
if (i->value->type == tNull) continue;
}
@ -1093,7 +1093,7 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
if (!context.empty())
throw EvalError(format("string '%1%' cannot refer to other paths, at %2%") % path % pos);
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
if (args[0]->type != tLambda)
throw TypeError(format("first argument in call to 'filterSource' is not a function but %1%, at %2%") % showType(*args[0]) % pos);
@ -1119,7 +1119,7 @@ static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value
} else if (attr.name == state.sName)
name = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "filter") {
state.forceValue(*attr.value);
state.forceValue(*attr.value, pos);
filterFun = attr.value;
} else if (n == "recursive")
recursive = state.forceBool(*attr.value, *attr.pos);
@ -1190,7 +1190,7 @@ void prim_getAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
throw EvalError(format("attribute '%1%' missing, at %2%") % attr % pos);
// !!! add to stack trace?
if (state.countCalls && i->pos) state.attrSelects[*i->pos]++;
state.forceValue(*i->value);
state.forceValue(*i->value, pos);
v = *i->value;
}
@ -1220,7 +1220,7 @@ static void prim_hasAttr(EvalState & state, const Pos & pos, Value * * args, Val
/* Determine whether the argument is a set. */
static void prim_isAttrs(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tAttrs);
}
@ -1346,7 +1346,7 @@ static void prim_catAttrs(EvalState & state, const Pos & pos, Value * * args, Va
*/
static void prim_functionArgs(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
if (args[0]->type != tLambda)
throw TypeError(format("'functionArgs' requires a function, at %1%") % pos);
@ -1392,7 +1392,7 @@ static void prim_mapAttrs(EvalState & state, const Pos & pos, Value * * args, Va
/* Determine whether the argument is a list. */
static void prim_isList(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[0], pos);
mkBool(v, args[0]->isList());
}
@ -1402,7 +1402,7 @@ static void elemAt(EvalState & state, const Pos & pos, Value & list, int n, Valu
state.forceList(list, pos);
if (n < 0 || (unsigned int) n >= list.listSize())
throw Error(format("list index %1% is out of bounds, at %2%") % n % pos);
state.forceValue(*list.listElems()[n]);
state.forceValue(*list.listElems()[n], pos);
v = *list.listElems()[n];
}
@ -1525,9 +1525,9 @@ static void prim_foldlStrict(EvalState & state, const Pos & pos, Value * * args,
vCur = n == args[2]->listSize() - 1 ? &v : state.allocValue();
state.callFunction(vTmp, *args[2]->listElems()[n], *vCur, pos);
}
state.forceValue(v);
state.forceValue(v, pos);
} else {
state.forceValue(*args[1]);
state.forceValue(*args[1], pos);
v = *args[1];
}
}
@ -1592,7 +1592,7 @@ static void prim_sort(EvalState & state, const Pos & pos, Value * * args, Value
auto len = args[1]->listSize();
state.mkList(v, len);
for (unsigned int n = 0; n < len; ++n) {
state.forceValue(*args[1]->listElems()[n]);
state.forceValue(*args[1]->listElems()[n], pos);
v.listElems()[n] = args[1]->listElems()[n];
}
@ -1627,7 +1627,7 @@ static void prim_partition(EvalState & state, const Pos & pos, Value * * args, V
for (unsigned int n = 0; n < len; ++n) {
auto vElem = args[1]->listElems()[n];
state.forceValue(*vElem);
state.forceValue(*vElem, pos);
Value res;
state.callFunction(*args[0], *vElem, res, pos);
if (state.forceBool(res, pos))
@ -1758,8 +1758,8 @@ static void prim_bitXor(EvalState & state, const Pos & pos, Value * * args, Valu
static void prim_lessThan(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0]);
state.forceValue(*args[1]);
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
CompareValues comp;
mkBool(v, comp(args[0], args[1]));
}

27
src/libstore/build.cc
View file

@ -33,7 +33,6 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <sys/select.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/un.h>
@ -43,6 +42,7 @@
#include <errno.h>
#include <cstring>
#include <termios.h>
#include <poll.h>
#include <pwd.h>
#include <grp.h>
@ -4789,8 +4789,7 @@ void Worker::waitForInput()
terminated. */
bool useTimeout = false;
struct timeval timeout;
timeout.tv_usec = 0;
long timeout = 0;
auto before = steady_time_point::clock::now();
/* If we're monitoring for silence on stdout/stderr, or if there
@ -4808,7 +4807,7 @@ void Worker::waitForInput()
nearest = std::min(nearest, i.timeStarted + std::chrono::seconds(settings.buildTimeout));
}
if (nearest != steady_time_point::max()) {
timeout.tv_sec = std::max(1L, (long) std::chrono::duration_cast<std::chrono::seconds>(nearest - before).count());
timeout = std::max(1L, (long) std::chrono::duration_cast<std::chrono::seconds>(nearest - before).count());
useTimeout = true;
}
@ -4819,30 +4818,28 @@ void Worker::waitForInput()
if (lastWokenUp == steady_time_point::min())
printError("waiting for locks or build slots...");
if (lastWokenUp == steady_time_point::min() || lastWokenUp > before) lastWokenUp = before;
timeout.tv_sec = std::max(1L,
timeout = std::max(1L,
(long) std::chrono::duration_cast<std::chrono::seconds>(
lastWokenUp + std::chrono::seconds(settings.pollInterval) - before).count());
} else lastWokenUp = steady_time_point::min();
if (useTimeout)
vomit("sleeping %d seconds", timeout.tv_sec);
vomit("sleeping %d seconds", timeout);
/* Use select() to wait for the input side of any logger pipe to
become `available'. Note that `available' (i.e., non-blocking)
includes EOF. */
fd_set fds;
FD_ZERO(&fds);
int fdMax = 0;
std::vector<struct pollfd> pollStatus;
std::map <int, int> fdToPollStatus;
for (auto & i : children) {
for (auto & j : i.fds) {
if (j >= FD_SETSIZE)
throw Error("reached FD_SETSIZE limit");
FD_SET(j, &fds);
if (j >= fdMax) fdMax = j + 1;
pollStatus.push_back((struct pollfd) { .fd = j, .events = POLLIN });
fdToPollStatus[j] = pollStatus.size() - 1;
}
}
if (select(fdMax, &fds, 0, 0, useTimeout ? &timeout : 0) == -1) {
if (poll(pollStatus.data(), pollStatus.size(),
useTimeout ? timeout * 1000 : -1) == -1) {
if (errno == EINTR) return;
throw SysError("waiting for input");
}
@ -4863,7 +4860,7 @@ void Worker::waitForInput()
set<int> fds2(j->fds);
std::vector<unsigned char> buffer(4096);
for (auto & k : fds2) {
if (FD_ISSET(k, &fds)) {
if (pollStatus.at(fdToPollStatus.at(k)).revents) {
ssize_t rd = read(k, buffer.data(), buffer.size());
// FIXME: is there a cleaner way to handle pt close
// than EIO? Is this even standard?

13
src/libutil/ansicolor.hh Normal file
View file

@ -0,0 +1,13 @@
#pragma once
namespace nix
{
/* Some ANSI escape sequences. */
#define ANSI_NORMAL "\e[0m"
#define ANSI_BOLD "\e[1m"
#define ANSI_FAINT "\e[2m"
#define ANSI_RED "\e[31;1m"
#define ANSI_GREEN "\e[32;1m"
#define ANSI_YELLOW "\e[33;1m"
#define ANSI_BLUE "\e[34;1m"
}

146
src/libutil/error.cc Normal file
View file

@ -0,0 +1,146 @@
#include "error.hh"
#include <iostream>
#include <optional>
namespace nix
{
std::optional<string> ErrorInfo::programName = std::nullopt;
std::ostream& operator<<(std::ostream &os, const hintformat &hf)
{
return os << hf.str();
}
string showErrPos(const ErrPos &errPos)
{
if (errPos.column > 0) {
return fmt("(%1%:%2%)", errPos.lineNumber, errPos.column);
} else {
return fmt("(%1%)", errPos.lineNumber);
};
}
void printCodeLines(const string &prefix, const NixCode &nixCode)
{
// previous line of code.
if (nixCode.prevLineOfCode.has_value()) {
std::cout << fmt("%1% %|2$5d|| %3%",
prefix,
(nixCode.errPos.lineNumber - 1),
*nixCode.prevLineOfCode)
<< std::endl;
}
// line of code containing the error.%2$+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(" ");
}
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;
}
}
void printErrorInfo(const ErrorInfo &einfo)
{
int errwidth = 80;
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;
}
}
int ndl = prefix.length() + levelString.length() + 3 + einfo.name.length() + einfo.programName.value_or("").length();
int dashwidth = ndl > (errwidth - 3) ? 3 : errwidth - ndl;
string dashes;
for (int i = 0; i < dashwidth; ++i)
dashes.append("-");
// 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.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;
} else {
std::cout << fmt("%1%from command line argument", prefix) << std::endl;
std::cout << prefix << std::endl;
}
}
// description
std::cout << prefix << einfo.description << std::endl;
std::cout << prefix << std::endl;
// lines of code.
if (einfo.nixCode->errLineOfCode != "") {
printCodeLines(prefix, *einfo.nixCode);
std::cout << prefix << std::endl;
}
// hint
if (einfo.hint.has_value()) {
std::cout << prefix << *einfo.hint << std::endl;
std::cout << prefix << std::endl;
}
}
}

121
src/libutil/error.hh Normal file
View file

@ -0,0 +1,121 @@
#ifndef error_hh
#define error_hh
#include "ansicolor.hh"
#include <string>
#include <optional>
#include <iostream>
#include "types.hh"
namespace nix
{
typedef enum {
elWarning,
elError
} ErrLevel;
struct ErrPos
{
int lineNumber;
int column;
string nixFile;
template <class P>
ErrPos& operator=(const P &pos)
{
lineNumber = pos.line;
column = pos.column;
nixFile = pos.file;
return *this;
}
template <class P>
ErrPos(const P &p)
{
*this = p;
}
};
struct NixCode
{
ErrPos errPos;
std::optional<string> prevLineOfCode;
string errLineOfCode;
std::optional<string> nextLineOfCode;
};
// ----------------------------------------------------------------
// format function for hints. same as fmt, except templated values
// are always in yellow.
template <class T>
struct yellowify
{
yellowify(T &s) : value(s) {}
T &value;
};
template <class T>
std::ostream& operator<<(std::ostream &out, const yellowify<T> &y)
{
return out << ANSI_YELLOW << y.value << ANSI_NORMAL;
}
class hintformat
{
public:
hintformat(string format) :fmt(format)
{
fmt.exceptions(boost::io::all_error_bits ^ boost::io::too_many_args_bit);
}
template<class T>
hintformat& operator%(const T &value)
{
fmt % yellowify(value);
return *this;
}
std::string str() const
{
return fmt.str();
}
template <typename U>
friend class AddHint;
private:
format fmt;
};
std::ostream& operator<<(std::ostream &os, const hintformat &hf);
template<typename... Args>
inline hintformat hintfmt(const std::string & fs, const Args & ... args)
{
hintformat f(fs);
formatHelper(f, args...);
return f;
}
// -------------------------------------------------
// ErrorInfo.
struct ErrorInfo
{
ErrLevel level;
string name;
string description;
std::optional<hintformat> hint;
std::optional<NixCode> nixCode;
static std::optional<string> programName;
};
// --------------------------------------------------------
// error printing
// just to cout for now.
void printErrorInfo(const ErrorInfo &einfo);
}
#endif

10
src/libutil/types.hh
View file

@ -41,7 +41,8 @@ struct FormatOrString
{
string s;
FormatOrString(const string & s) : s(s) { };
FormatOrString(const format & f) : s(f.str()) { };
template<class F>
FormatOrString(const F & f) : s(f.str()) { };
FormatOrString(const char * s) : s(s) { };
};
@ -51,12 +52,13 @@ struct FormatOrString
... a_n’. However, ‘fmt(s)’ is equivalent to ‘s’ (so no %-expansion
takes place). */
inline void formatHelper(boost::format & f)
template<class F>
inline void formatHelper(F & f)
{
}
template<typename T, typename... Args>
inline void formatHelper(boost::format & f, const T & x, const Args & ... args)
template<class F, typename T, typename... Args>
inline void formatHelper(F & f, const T & x, const Args & ... args)
{
formatHelper(f % x, args...);
}

10
src/libutil/util.hh
View file

@ -2,6 +2,7 @@
#include "types.hh"
#include "logging.hh"
#include "ansicolor.hh"
#include <sys/types.h>
#include <sys/stat.h>
@ -450,15 +451,6 @@ std::string shellEscape(const std::string & s);
void ignoreException();
/* Some ANSI escape sequences. */
#define ANSI_NORMAL "\e[0m"
#define ANSI_BOLD "\e[1m"
#define ANSI_FAINT "\e[2m"
#define ANSI_RED "\e[31;1m"
#define ANSI_GREEN "\e[32;1m"
#define ANSI_YELLOW "\e[33;1m"
#define ANSI_BLUE "\e[34;1m"
/* Tree formatting. */
constexpr char treeConn[] = "├───";