libmain/progress-bar: move implementation out of the header

Change-Id: Ib4b42ebea290ee575294df6b2f17a38a5d850b80

src/libmain/progress-bar.cc

@@ -13,6 +13,11 @@
 
 namespace nix {
 
+// 100 years ought to be enough for anyone (yet sufficiently smaller than max() to not cause signed integer overflow).
+constexpr const auto A_LONG_TIME = std::chrono::duration_cast<std::chrono::milliseconds>(
+    100 * 365 * std::chrono::seconds(86400)
+);
+
 using namespace std::literals::chrono_literals;
 
 static std::string_view getS(const std::vector<Logger::Field> & fields, size_t n)
@@ -36,6 +41,21 @@ static std::string_view storePathToName(std::string_view path)
     return i == std::string::npos ? base.substr(0, 0) : base.substr(i + 1);
 }
 
+ProgressBar::ProgressBar(bool isTTY)
+    : isTTY(isTTY)
+{
+    state_.lock()->active = isTTY;
+    updateThread = std::thread([&]() {
+        auto state(state_.lock());
+        auto nextWakeup = A_LONG_TIME;
+        while (state->active) {
+            if (!state->haveUpdate)
+                state.wait_for(updateCV, nextWakeup);
+            nextWakeup = draw(*state, {});
+            state.wait_for(quitCV, std::chrono::milliseconds(50));
+        }
+    });
+}
 
 ProgressBar::~ProgressBar()
 {

src/libmain/progress-bar.hh

@@ -8,11 +8,6 @@
 
 namespace nix {
 
-// 100 years ought to be enough for anyone (yet sufficiently smaller than max() to not cause signed integer overflow).
-constexpr const auto A_LONG_TIME = std::chrono::duration_cast<std::chrono::milliseconds>(
-    100 * 365 * std::chrono::seconds(86400)
-);
-
 struct ProgressBar : public Logger
 {
     struct ActInfo
@@ -68,21 +63,7 @@ struct ProgressBar : public Logger
     bool printMultiline = false;
     bool isTTY;
 
-    ProgressBar(bool isTTY)
+    ProgressBar(bool isTTY);
-        : isTTY(isTTY)
-    {
-        state_.lock()->active = isTTY;
-        updateThread = std::thread([&]() {
-            auto state(state_.lock());
-            auto nextWakeup = A_LONG_TIME;
-            while (state->active) {
-                if (!state->haveUpdate)
-                    state.wait_for(updateCV, nextWakeup);
-                nextWakeup = draw(*state, {});
-                state.wait_for(quitCV, std::chrono::milliseconds(50));
-            }
-        });
-    }
 
     ~ProgressBar();