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nix-gh/src/nix/progress-bar.cc
Eelco Dolstra 66b8a62101 nix: Add --print-build-logs flag 
This causes 'nix' to print build log output to stderr rather than
showing the last log line in the progress bar. Log lines are prefixed
by the name of the derivation (minus the version string), e.g.

  binutils> make[1]: Leaving directory '/build/binutils-2.31.1'
  binutils-wrapper> unpacking sources
  binutils-wrapper> patching sources
  ...
  binutils-wrapper> Using dynamic linker: '/nix/store/kr51dlsj9v5cr4n8700jliyz8v5b2q7q-bootstrap-stage0-glibc/lib/ld-linux-x86-64.so.2'
  bootstrap-stage2-gcc-wrapper> unpacking sources
  ...
  linux-headers> unpacking sources
  linux-headers> unpacking source archive /nix/store/8javli69jhj3bkql2c35gsj5vl91p382-linux-4.19.16.tar.xz
2019-05-15 17:33:56 +02:00

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#include "progress-bar.hh"
#include "util.hh"
#include "sync.hh"
#include "store-api.hh"
#include "names.hh"
#include <atomic>
#include <map>
#include <thread>
namespace nix {
static std::string getS(const std::vector<Logger::Field> & fields, size_t n)
{
assert(n < fields.size());
assert(fields[n].type == Logger::Field::tString);
return fields[n].s;
}
static uint64_t getI(const std::vector<Logger::Field> & fields, size_t n)
{
assert(n < fields.size());
assert(fields[n].type == Logger::Field::tInt);
return fields[n].i;
}
class ProgressBar : public Logger
{
private:
struct ActInfo
{
std::string s, lastLine, phase;
ActivityType type = actUnknown;
uint64_t done = 0;
uint64_t expected = 0;
uint64_t running = 0;
uint64_t failed = 0;
std::map<ActivityType, uint64_t> expectedByType;
bool visible = true;
ActivityId parent;
std::optional<std::string> name;
};
struct ActivitiesByType
{
std::map<ActivityId, std::list<ActInfo>::iterator> its;
uint64_t done = 0;
uint64_t expected = 0;
uint64_t failed = 0;
};
struct State
{
std::list<ActInfo> activities;
std::map<ActivityId, std::list<ActInfo>::iterator> its;
std::map<ActivityType, ActivitiesByType> activitiesByType;
uint64_t filesLinked = 0, bytesLinked = 0;
uint64_t corruptedPaths = 0, untrustedPaths = 0;
bool active = true;
};
Sync<State> state_;
std::thread updateThread;
std::condition_variable quitCV, updateCV;
bool printBuildLogs;
bool isTTY;
public:
ProgressBar(bool printBuildLogs, bool isTTY)
: printBuildLogs(printBuildLogs)
, isTTY(isTTY)
{
state_.lock()->active = isTTY;
updateThread = std::thread([&]() {
auto state(state_.lock());
while (state->active) {
state.wait(updateCV);
draw(*state);
state.wait_for(quitCV, std::chrono::milliseconds(50));
}
});
}
~ProgressBar()
{
stop();
updateThread.join();
}
void stop()
{
auto state(state_.lock());
if (!state->active) return;
state->active = false;
std::string status = getStatus(*state);
writeToStderr("\r\e[K");
if (status != "")
writeToStderr("[" + status + "]\n");
updateCV.notify_one();
quitCV.notify_one();
}
void log(Verbosity lvl, const FormatOrString & fs) override
{
auto state(state_.lock());
log(*state, lvl, fs.s);
}
void log(State & state, Verbosity lvl, const std::string & s)
{
if (state.active) {
writeToStderr("\r\e[K" + s + ANSI_NORMAL "\n");
draw(state);
} else {
auto s2 = s + ANSI_NORMAL "\n";
if (!isTTY) s2 = filterANSIEscapes(s2, true);
writeToStderr(s2);
}
}
void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
const std::string & s, const Fields & fields, ActivityId parent) override
{
auto state(state_.lock());
if (lvl <= verbosity && !s.empty())
log(*state, lvl, s + "...");
state->activities.emplace_back(ActInfo());
auto i = std::prev(state->activities.end());
i->s = s;
i->type = type;
i->parent = parent;
state->its.emplace(act, i);
state->activitiesByType[type].its.emplace(act, i);
if (type == actBuild) {
auto name = storePathToName(getS(fields, 0));
if (hasSuffix(name, ".drv"))
name.resize(name.size() - 4);
i->s = fmt("building " ANSI_BOLD "%s" ANSI_NORMAL, name);
auto machineName = getS(fields, 1);
if (machineName != "")
i->s += fmt(" on " ANSI_BOLD "%s" ANSI_NORMAL, machineName);
auto curRound = getI(fields, 2);
auto nrRounds = getI(fields, 3);
if (nrRounds != 1)
i->s += fmt(" (round %d/%d)", curRound, nrRounds);
i->name = DrvName(name).name;
}
if (type == actSubstitute) {
auto name = storePathToName(getS(fields, 0));
auto sub = getS(fields, 1);
i->s = fmt(
hasPrefix(sub, "local")
? "copying " ANSI_BOLD "%s" ANSI_NORMAL " from %s"
: "fetching " ANSI_BOLD "%s" ANSI_NORMAL " from %s",
name, sub);
}
if (type == actQueryPathInfo) {
auto name = storePathToName(getS(fields, 0));
i->s = fmt("querying " ANSI_BOLD "%s" ANSI_NORMAL " on %s", name, getS(fields, 1));
}
if ((type == actDownload && hasAncestor(*state, actCopyPath, parent))
|| (type == actDownload && hasAncestor(*state, actQueryPathInfo, parent))
|| (type == actCopyPath && hasAncestor(*state, actSubstitute, parent)))
i->visible = false;
update();
}
/* Check whether an activity has an ancestore with the specified
type. */
bool hasAncestor(State & state, ActivityType type, ActivityId act)
{
while (act != 0) {
auto i = state.its.find(act);
if (i == state.its.end()) break;
if (i->second->type == type) return true;
act = i->second->parent;
}
return false;
}
void stopActivity(ActivityId act) override
{
auto state(state_.lock());
auto i = state->its.find(act);
if (i != state->its.end()) {
auto & actByType = state->activitiesByType[i->second->type];
actByType.done += i->second->done;
actByType.failed += i->second->failed;
for (auto & j : i->second->expectedByType)
state->activitiesByType[j.first].expected -= j.second;
actByType.its.erase(act);
state->activities.erase(i->second);
state->its.erase(i);
}
update();
}
void result(ActivityId act, ResultType type, const std::vector<Field> & fields) override
{
auto state(state_.lock());
if (type == resFileLinked) {
state->filesLinked++;
state->bytesLinked += getI(fields, 0);
update();
}
else if (type == resBuildLogLine) {
auto lastLine = trim(getS(fields, 0));
if (!lastLine.empty()) {
auto i = state->its.find(act);
assert(i != state->its.end());
ActInfo info = *i->second;
if (printBuildLogs) {
log(*state, lvlInfo, ANSI_FAINT + info.name.value_or("unnamed") + "> " + ANSI_NORMAL + lastLine);
} else {
state->activities.erase(i->second);
info.lastLine = lastLine;
state->activities.emplace_back(info);
i->second = std::prev(state->activities.end());
update();
}
}
}
else if (type == resUntrustedPath) {
state->untrustedPaths++;
update();
}
else if (type == resCorruptedPath) {
state->corruptedPaths++;
update();
}
else if (type == resSetPhase) {
auto i = state->its.find(act);
assert(i != state->its.end());
i->second->phase = getS(fields, 0);
update();
}
else if (type == resProgress) {
auto i = state->its.find(act);
assert(i != state->its.end());
ActInfo & actInfo = *i->second;
actInfo.done = getI(fields, 0);
actInfo.expected = getI(fields, 1);
actInfo.running = getI(fields, 2);
actInfo.failed = getI(fields, 3);
update();
}
else if (type == resSetExpected) {
auto i = state->its.find(act);
assert(i != state->its.end());
ActInfo & actInfo = *i->second;
auto type = (ActivityType) getI(fields, 0);
auto & j = actInfo.expectedByType[type];
state->activitiesByType[type].expected -= j;
j = getI(fields, 1);
state->activitiesByType[type].expected += j;
update();
}
}
void update()
{
updateCV.notify_one();
}
void draw(State & state)
{
if (!state.active) return;
std::string line;
std::string status = getStatus(state);
if (!status.empty()) {
line += '[';
line += status;
line += "]";
}
if (!state.activities.empty()) {
if (!status.empty()) line += " ";
auto i = state.activities.rbegin();
while (i != state.activities.rend() && (!i->visible || (i->s.empty() && i->lastLine.empty())))
++i;
if (i != state.activities.rend()) {
line += i->s;
if (!i->phase.empty()) {
line += " (";
line += i->phase;
line += ")";
}
if (!i->lastLine.empty()) {
if (!i->s.empty()) line += ": ";
line += i->lastLine;
}
}
}
auto width = getWindowSize().second;
if (width <= 0) std::numeric_limits<decltype(width)>::max();
writeToStderr("\r" + filterANSIEscapes(line, false, width) + "\e[K");
}
std::string getStatus(State & state)
{
auto MiB = 1024.0 * 1024.0;
std::string res;
auto renderActivity = [&](ActivityType type, const std::string & itemFmt, const std::string & numberFmt = "%d", double unit = 1) {
auto & act = state.activitiesByType[type];
uint64_t done = act.done, expected = act.done, running = 0, failed = act.failed;
for (auto & j : act.its) {
done += j.second->done;
expected += j.second->expected;
running += j.second->running;
failed += j.second->failed;
}
expected = std::max(expected, act.expected);
std::string s;
if (running || done || expected || failed) {
if (running)
s = fmt(ANSI_BLUE + numberFmt + ANSI_NORMAL "/" ANSI_GREEN + numberFmt + ANSI_NORMAL "/" + numberFmt,
running / unit, done / unit, expected / unit);
else if (expected != done)
s = fmt(ANSI_GREEN + numberFmt + ANSI_NORMAL "/" + numberFmt,
done / unit, expected / unit);
else
s = fmt(done ? ANSI_GREEN + numberFmt + ANSI_NORMAL : numberFmt, done / unit);
s = fmt(itemFmt, s);
if (failed)
s += fmt(" (" ANSI_RED "%d failed" ANSI_NORMAL ")", failed / unit);
}
return s;
};
auto showActivity = [&](ActivityType type, const std::string & itemFmt, const std::string & numberFmt = "%d", double unit = 1) {
auto s = renderActivity(type, itemFmt, numberFmt, unit);
if (s.empty()) return;
if (!res.empty()) res += ", ";
res += s;
};
showActivity(actBuilds, "%s built");
auto s1 = renderActivity(actCopyPaths, "%s copied");
auto s2 = renderActivity(actCopyPath, "%s MiB", "%.1f", MiB);
if (!s1.empty() || !s2.empty()) {
if (!res.empty()) res += ", ";
if (s1.empty()) res += "0 copied"; else res += s1;
if (!s2.empty()) { res += " ("; res += s2; res += ')'; }
}
showActivity(actDownload, "%s MiB DL", "%.1f", MiB);
{
auto s = renderActivity(actOptimiseStore, "%s paths optimised");
if (s != "") {
s += fmt(", %.1f MiB / %d inodes freed", state.bytesLinked / MiB, state.filesLinked);
if (!res.empty()) res += ", ";
res += s;
}
}
// FIXME: don't show "done" paths in green.
showActivity(actVerifyPaths, "%s paths verified");
if (state.corruptedPaths) {
if (!res.empty()) res += ", ";
res += fmt(ANSI_RED "%d corrupted" ANSI_NORMAL, state.corruptedPaths);
}
if (state.untrustedPaths) {
if (!res.empty()) res += ", ";
res += fmt(ANSI_RED "%d untrusted" ANSI_NORMAL, state.untrustedPaths);
}
return res;
}
};
void startProgressBar(bool printBuildLogs)
{
logger = new ProgressBar(printBuildLogs, isatty(STDERR_FILENO));
}
void stopProgressBar()
{
auto progressBar = dynamic_cast<ProgressBar *>(logger);
if (progressBar) progressBar->stop();
}
}
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