Compression progress and progress context priority

include/dwarfs/progress.h

@@ -57,6 +57,7 @@ class progress {
     virtual ~context() = default;
 
     virtual status get_status() const = 0;
+    virtual int get_priority() const { return 0; }
 
     speedometer<uint64_t> speed{std::chrono::seconds(5)};
   };

src/dwarfs/console_writer.cpp

@@ -133,12 +133,12 @@ void output_context_line(std::ostream& os, progress::context& ctx, size_t width,
     }
   }
 
-  os << terminal_colored(st.context, st.color, colored);
+  os << terminal_colored(st.context, st.color, colored, termstyle::BOLD);
 
   os << terminal_colored(fmt::format("{:<{}} {}{}", st.status_string,
                                      status_w - st.context.size(), progress,
                                      speed),
-                         st.color, colored, termstyle::DIM);
+                         st.color, colored);
 }
 
 } // namespace

src/dwarfs/filesystem_writer.cpp

@@ -46,10 +46,38 @@ namespace dwarfs {
 
 namespace {
 
+class compression_progress : public progress::context {
+ public:
+  using status = progress::context::status;
+
+  compression_progress() = default;
+
+  status get_status() const override {
+    status st;
+    st.color = termcolor::RED;
+    st.context = "[compressing] ";
+    auto bin = bytes_in.load();
+    auto bout = bytes_out.load();
+    if (bin > 0 && bout > 0) {
+      st.status_string = fmt::format("compressed {} to {} (ratio {:.2f}%)",
+                                     size_with_unit(bin), size_with_unit(bout),
+                                     100.0 * bout / bin);
+    }
+    st.bytes_processed.emplace(bytes_in.load());
+    return st;
+  }
+
+  int get_priority() const override { return -1000; }
+
+  std::atomic<size_t> bytes_in{0};
+  std::atomic<size_t> bytes_out{0};
+};
+
 class fsblock {
  public:
   fsblock(section_type type, block_compressor const& bc,
-          std::shared_ptr<block_data>&& data, uint32_t number);
+          std::shared_ptr<block_data>&& data, uint32_t number,
+          std::shared_ptr<compression_progress> pctx);
 
   fsblock(section_type type, compression_type compression,
           std::span<uint8_t const> data, uint32_t number);
@@ -95,13 +123,15 @@ class fsblock {
 class raw_fsblock : public fsblock::impl {
  public:
   raw_fsblock(section_type type, const block_compressor& bc,
-              std::shared_ptr<block_data>&& data, uint32_t number)
+              std::shared_ptr<block_data>&& data, uint32_t number,
+              std::shared_ptr<compression_progress> pctx)
       : type_{type}
       , bc_{bc}
       , uncompressed_size_{data->size()}
       , data_{std::move(data)}
       , number_{number}
-      , comp_type_{bc_.type()} {}
+      , comp_type_{bc_.type()}
+      , pctx_{std::move(pctx)} {}
 
   void compress(worker_group& wg, std::optional<std::string> meta) override {
     std::promise<void> prom;
@@ -118,6 +148,9 @@ class raw_fsblock : public fsblock::impl {
           tmp = std::make_shared<block_data>(bc_.compress(data_->vec()));
         }
 
+        pctx_->bytes_in += data_->vec().size();
+        pctx_->bytes_out += tmp->vec().size();
+
         {
           std::lock_guard lock(mx_);
           data_.swap(tmp);
@@ -163,6 +196,7 @@ class raw_fsblock : public fsblock::impl {
   uint32_t const number_;
   section_header_v2 header_;
   compression_type comp_type_;
+  std::shared_ptr<compression_progress> pctx_;
 };
 
 class compressed_fsblock : public fsblock::impl {
@@ -212,8 +246,10 @@ class compressed_fsblock : public fsblock::impl {
 };
 
 fsblock::fsblock(section_type type, block_compressor const& bc,
-                 std::shared_ptr<block_data>&& data, uint32_t number)
-    : impl_(std::make_unique<raw_fsblock>(type, bc, std::move(data), number)) {}
+                 std::shared_ptr<block_data>&& data, uint32_t number,
+                 std::shared_ptr<compression_progress> pctx)
+    : impl_(std::make_unique<raw_fsblock>(type, bc, std::move(data), number,
+                                          std::move(pctx))) {}
 
 fsblock::fsblock(section_type type, compression_type compression,
                  std::span<uint8_t const> data, uint32_t number)
@@ -299,6 +335,7 @@ class filesystem_writer_ final : public filesystem_writer::impl {
   const filesystem_writer_options options_;
   LOG_PROXY_DECL(LoggerPolicy);
   std::deque<std::unique_ptr<fsblock>> queue_;
+  std::shared_ptr<compression_progress> pctx_;
   mutable std::mutex mx_;
   std::condition_variable cond_;
   volatile bool flush_;
@@ -321,6 +358,7 @@ filesystem_writer_<LoggerPolicy>::filesystem_writer_(
     , metadata_bc_(metadata_bc)
     , options_(options)
     , LOG_PROXY_INIT(lgr)
+    , pctx_{prog.create_context<compression_progress>()}
     , flush_(false)
     , writer_thread_(&filesystem_writer_::writer_thread, this) {
   if (header_) {
@@ -453,7 +491,8 @@ uint32_t filesystem_writer_<LoggerPolicy>::write_section(
     }
 
     block_no = section_number_++;
-    auto fsb = std::make_unique<fsblock>(type, bc, std::move(data), block_no);
+    auto fsb =
+        std::make_unique<fsblock>(type, bc, std::move(data), block_no, pctx_);
 
     fsb->compress(wg_, meta);
 

src/dwarfs/progress.cpp

@@ -82,6 +82,10 @@ auto progress::get_active_contexts() const
                     contexts_.end());
   }
 
+  std::stable_sort(rv.begin(), rv.end(), [](const auto& a, const auto& b) {
+    return a->get_priority() > b->get_priority();
+  });
+
   return rv;
 }