feat(tvix/store/bin): add progress bar infrastructure

This adds the tracing-indicatif crate, and configures it as a layer in
our tracing_subscriber pipeline to emit progress for every span that's
configured so.

It also moves from using std::io::stderr to write logs to using their
writer, to avoid clobbering output.

Progress bar styles are defined in a lazy_static, moving this into a
general tracing is left for later.

This adds some usage of this to the `imports` and `copy` commands.

The output can still be improved a bit - we should  probably split each
task up into a smaller (instrumented) helper functions, so we can create
a progress bar for each task.

Change-Id: I59a1915aa4e0caa89c911632dec59c4cbeba1b89
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11747
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: Simon Hauser <simon.hauser@helsinki-systems.de>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>

tvix/Cargo.lock

@@ -677,6 +677,19 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "console"
+version = "0.15.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e1f83fc076bd6dd27517eacdf25fef6c4dfe5f1d7448bafaaf3a26f13b5e4eb"
+dependencies = [
+ "encode_unicode",
+ "lazy_static",
+ "libc",
+ "unicode-width",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.9.6"
@@ -1007,6 +1020,12 @@ version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
 
+[[package]]
+name = "encode_unicode"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.33"
@@ -1664,6 +1683,20 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "indicatif"
+version = "0.17.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "763a5a8f45087d6bcea4222e7b72c291a054edf80e4ef6efd2a4979878c7bea3"
+dependencies = [
+ "console",
+ "instant",
+ "number_prefix",
+ "portable-atomic",
+ "unicode-width",
+ "vt100",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -2137,6 +2170,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "number_prefix"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b246a0e5f20af87141b25c173cd1b609bd7779a4617d6ec582abaf90870f3"
+
 [[package]]
 name = "object"
 version = "0.32.2"
@@ -2476,6 +2515,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
+
 [[package]]
 name = "powerfmt"
 version = "0.2.0"
@@ -3980,6 +4025,18 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "tracing-indicatif"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "069580424efe11d97c3fef4197fa98c004fa26672cc71ad8770d224e23b1951d"
+dependencies = [
+ "indicatif",
+ "tracing",
+ "tracing-core",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "tracing-log"
 version = "0.2.0"
@@ -4073,6 +4130,7 @@ dependencies = [
  "fuse-backend-rs",
  "futures",
  "hex-literal",
+ "indicatif",
  "lazy_static",
  "libc",
  "object_store",
@@ -4099,6 +4157,7 @@ dependencies = [
  "tonic-reflection",
  "tower",
  "tracing",
+ "tracing-indicatif",
  "url",
  "vhost",
  "vhost-user-backend",
@@ -4210,6 +4269,7 @@ dependencies = [
  "tokio-tar",
  "tokio-util",
  "tracing",
+ "tracing-indicatif",
  "tvix-build",
  "tvix-castore",
  "tvix-eval",
@@ -4244,6 +4304,7 @@ dependencies = [
  "count-write",
  "data-encoding",
  "futures",
+ "indicatif",
  "lazy_static",
  "lru",
  "nix-compat",
@@ -4275,6 +4336,7 @@ dependencies = [
  "tonic-reflection",
  "tower",
  "tracing",
+ "tracing-indicatif",
  "tracing-opentelemetry",
  "tracing-subscriber",
  "tvix-castore",
@@ -4488,6 +4550,39 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "vt100"
+version = "0.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84cd863bf0db7e392ba3bd04994be3473491b31e66340672af5d11943c6274de"
+dependencies = [
+ "itoa",
+ "log",
+ "unicode-width",
+ "vte",
+]
+
+[[package]]
+name = "vte"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5022b5fbf9407086c180e9557be968742d839e68346af7792b8592489732197"
+dependencies = [
+ "arrayvec",
+ "utf8parse",
+ "vte_generate_state_changes",
+]
+
+[[package]]
+name = "vte_generate_state_changes"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d257817081c7dffcdbab24b9e62d2def62e2ff7d00b1c20062551e6cccc145ff"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
 [[package]]
 name = "wait-timeout"
 version = "0.2.0"

tvix/Cargo.nix

@@ -2126,6 +2126,47 @@ rec {
         };
         resolvedDefaultFeatures = [ "default" "std" ];
       };
+      "console" = rec {
+        crateName = "console";
+        version = "0.15.8";
+        edition = "2018";
+        sha256 = "1sz4nl9nz8pkmapqni6py7jxzi7nzqjxzb3ya4kxvmkb0zy867qf";
+        authors = [
+          "Armin Ronacher <armin.ronacher@active-4.com>"
+        ];
+        dependencies = [
+          {
+            name = "encode_unicode";
+            packageId = "encode_unicode";
+            target = { target, features }: (target."windows" or false);
+          }
+          {
+            name = "lazy_static";
+            packageId = "lazy_static";
+          }
+          {
+            name = "libc";
+            packageId = "libc";
+          }
+          {
+            name = "unicode-width";
+            packageId = "unicode-width";
+            optional = true;
+          }
+          {
+            name = "windows-sys";
+            packageId = "windows-sys 0.52.0";
+            target = { target, features }: (target."windows" or false);
+            features = [ "Win32_Foundation" "Win32_System_Console" "Win32_Storage_FileSystem" "Win32_UI_Input_KeyboardAndMouse" ];
+          }
+        ];
+        features = {
+          "default" = [ "unicode-width" "ansi-parsing" ];
+          "unicode-width" = [ "dep:unicode-width" ];
+          "windows-console-colors" = [ "ansi-parsing" ];
+        };
+        resolvedDefaultFeatures = [ "ansi-parsing" "unicode-width" ];
+      };
       "const-oid" = rec {
         crateName = "const-oid";
         version = "0.9.6";
@@ -3072,6 +3113,21 @@ rec {
         };
         resolvedDefaultFeatures = [ "default" "use_std" ];
       };
+      "encode_unicode" = rec {
+        crateName = "encode_unicode";
+        version = "0.3.6";
+        edition = "2015";
+        sha256 = "07w3vzrhxh9lpjgsg2y5bwzfar2aq35mdznvcp3zjl0ssj7d4mx3";
+        authors = [
+          "Torbjørn Birch Moltu <t.b.moltu@lyse.net>"
+        ];
+        features = {
+          "ascii" = [ "dep:ascii" ];
+          "clippy" = [ "dep:clippy" ];
+          "default" = [ "std" ];
+        };
+        resolvedDefaultFeatures = [ "default" "std" ];
+      };
       "encoding_rs" = rec {
         crateName = "encoding_rs";
         version = "0.8.33";
@@ -5057,6 +5113,55 @@ rec {
         };
         resolvedDefaultFeatures = [ "default" "serde" "std" ];
       };
+      "indicatif" = rec {
+        crateName = "indicatif";
+        version = "0.17.8";
+        edition = "2021";
+        sha256 = "18xyqxw9i5x4sbpzckhfz3nm984iq9r7nbi2lk76nz888n7mlfkn";
+        dependencies = [
+          {
+            name = "console";
+            packageId = "console";
+            usesDefaultFeatures = false;
+            features = [ "ansi-parsing" ];
+          }
+          {
+            name = "instant";
+            packageId = "instant";
+            target = { target, features }: ("wasm32" == target."arch" or null);
+          }
+          {
+            name = "number_prefix";
+            packageId = "number_prefix";
+          }
+          {
+            name = "portable-atomic";
+            packageId = "portable-atomic";
+          }
+          {
+            name = "unicode-width";
+            packageId = "unicode-width";
+            optional = true;
+          }
+          {
+            name = "vt100";
+            packageId = "vt100";
+            optional = true;
+          }
+        ];
+        features = {
+          "default" = [ "unicode-width" "console/unicode-width" ];
+          "futures" = [ "dep:futures-core" ];
+          "improved_unicode" = [ "unicode-segmentation" "unicode-width" "console/unicode-width" ];
+          "in_memory" = [ "vt100" ];
+          "rayon" = [ "dep:rayon" ];
+          "tokio" = [ "dep:tokio" ];
+          "unicode-segmentation" = [ "dep:unicode-segmentation" ];
+          "unicode-width" = [ "dep:unicode-width" ];
+          "vt100" = [ "dep:vt100" ];
+        };
+        resolvedDefaultFeatures = [ "default" "in_memory" "unicode-width" "vt100" ];
+      };
       "instant" = rec {
         crateName = "instant";
         version = "0.1.12";
@@ -6440,6 +6545,19 @@ rec {
         ];
 
       };
+      "number_prefix" = rec {
+        crateName = "number_prefix";
+        version = "0.4.0";
+        edition = "2015";
+        sha256 = "1wvh13wvlajqxkb1filsfzbrnq0vrmrw298v2j3sy82z1rm282w3";
+        authors = [
+          "Benjamin Sago <ogham@bsago.me>"
+        ];
+        features = {
+          "default" = [ "std" ];
+        };
+        resolvedDefaultFeatures = [ "default" "std" ];
+      };
       "object" = rec {
         crateName = "object";
         version = "0.32.2";
@@ -7535,6 +7653,18 @@ rec {
         ];
 
       };
+      "portable-atomic" = rec {
+        crateName = "portable-atomic";
+        version = "1.6.0";
+        edition = "2018";
+        sha256 = "1h77x9qx7pns0d66vdrmdbmwpi7586h7ysnkdnhrn5mwi2cyyw3i";
+        features = {
+          "critical-section" = [ "dep:critical-section" ];
+          "default" = [ "fallback" ];
+          "serde" = [ "dep:serde" ];
+        };
+        resolvedDefaultFeatures = [ "default" "fallback" ];
+      };
       "powerfmt" = rec {
         crateName = "powerfmt";
         version = "0.2.0";
@@ -12414,6 +12544,33 @@ rec {
         };
         resolvedDefaultFeatures = [ "default" "pin-project" "std" "std-future" ];
       };
+      "tracing-indicatif" = rec {
+        crateName = "tracing-indicatif";
+        version = "0.3.6";
+        edition = "2021";
+        sha256 = "07cmn4ilw8hdfzc1mirccwkgl160k3x9fhgg7xydj4gy9r181586";
+        libName = "tracing_indicatif";
+        dependencies = [
+          {
+            name = "indicatif";
+            packageId = "indicatif";
+            features = [ "in_memory" ];
+          }
+          {
+            name = "tracing";
+            packageId = "tracing";
+          }
+          {
+            name = "tracing-core";
+            packageId = "tracing-core";
+          }
+          {
+            name = "tracing-subscriber";
+            packageId = "tracing-subscriber";
+          }
+        ];
+
+      };
       "tracing-log" = rec {
         crateName = "tracing-log";
         version = "0.2.0";
@@ -12828,6 +12985,10 @@ rec {
             name = "futures";
             packageId = "futures";
           }
+          {
+            name = "indicatif";
+            packageId = "indicatif";
+          }
           {
             name = "lazy_static";
             packageId = "lazy_static";
@@ -12915,6 +13076,10 @@ rec {
             name = "tracing";
             packageId = "tracing";
           }
+          {
+            name = "tracing-indicatif";
+            packageId = "tracing-indicatif";
+          }
           {
             name = "url";
             packageId = "url";
@@ -13386,6 +13551,10 @@ rec {
             name = "tracing";
             packageId = "tracing";
           }
+          {
+            name = "tracing-indicatif";
+            packageId = "tracing-indicatif";
+          }
           {
             name = "tvix-build";
             packageId = "tvix-build";
@@ -13548,6 +13717,10 @@ rec {
             name = "futures";
             packageId = "futures";
           }
+          {
+            name = "indicatif";
+            packageId = "indicatif";
+          }
           {
             name = "lazy_static";
             packageId = "lazy_static";
@@ -13662,6 +13835,10 @@ rec {
             name = "tracing";
             packageId = "tracing";
           }
+          {
+            name = "tracing-indicatif";
+            packageId = "tracing-indicatif";
+          }
           {
             name = "tracing-opentelemetry";
             packageId = "tracing-opentelemetry";
@@ -14247,6 +14424,97 @@ rec {
           "with-serde" = [ "serde" "serde_derive" ];
         };
       };
+      "vt100" = rec {
+        crateName = "vt100";
+        version = "0.15.2";
+        edition = "2021";
+        sha256 = "1pklc8y984axmxr0cd363srr2d27wd5rj15xlcmkjznvy0xqdkc4";
+        authors = [
+          "Jesse Luehrs <doy@tozt.net>"
+        ];
+        dependencies = [
+          {
+            name = "itoa";
+            packageId = "itoa";
+          }
+          {
+            name = "log";
+            packageId = "log";
+          }
+          {
+            name = "unicode-width";
+            packageId = "unicode-width";
+          }
+          {
+            name = "vte";
+            packageId = "vte";
+          }
+        ];
+        devDependencies = [
+          {
+            name = "vte";
+            packageId = "vte";
+          }
+        ];
+
+      };
+      "vte" = rec {
+        crateName = "vte";
+        version = "0.11.1";
+        edition = "2021";
+        sha256 = "15r1ff4j8ndqj9vsyil3wqwxhhl7jsz5g58f31n0h1wlpxgjn0pm";
+        authors = [
+          "Joe Wilm <joe@jwilm.com>"
+          "Christian Duerr <contact@christianduerr.com>"
+        ];
+        dependencies = [
+          {
+            name = "arrayvec";
+            packageId = "arrayvec";
+            optional = true;
+            usesDefaultFeatures = false;
+          }
+          {
+            name = "utf8parse";
+            packageId = "utf8parse";
+          }
+          {
+            name = "vte_generate_state_changes";
+            packageId = "vte_generate_state_changes";
+          }
+        ];
+        features = {
+          "ansi" = [ "log" ];
+          "arrayvec" = [ "dep:arrayvec" ];
+          "default" = [ "no_std" ];
+          "log" = [ "dep:log" ];
+          "nightly" = [ "utf8parse/nightly" ];
+          "no_std" = [ "arrayvec" ];
+          "serde" = [ "dep:serde" ];
+        };
+        resolvedDefaultFeatures = [ "arrayvec" "default" "no_std" ];
+      };
+      "vte_generate_state_changes" = rec {
+        crateName = "vte_generate_state_changes";
+        version = "0.1.1";
+        edition = "2018";
+        sha256 = "1zs5q766q7jmc80c5c80gpzy4qpg5lnydf94mgdzrpy7h5q82myj";
+        procMacro = true;
+        authors = [
+          "Christian Duerr <contact@christianduerr.com>"
+        ];
+        dependencies = [
+          {
+            name = "proc-macro2";
+            packageId = "proc-macro2";
+          }
+          {
+            name = "quote";
+            packageId = "quote";
+          }
+        ];
+
+      };
       "wait-timeout" = rec {
         crateName = "wait-timeout";
         version = "0.2.0";
@@ -15725,7 +15993,7 @@ rec {
           "Win32_Web" = [ "Win32" ];
           "Win32_Web_InternetExplorer" = [ "Win32_Web" ];
         };
-        resolvedDefaultFeatures = [ "Wdk" "Wdk_Foundation" "Wdk_Storage" "Wdk_Storage_FileSystem" "Win32" "Win32_Foundation" "Win32_NetworkManagement" "Win32_NetworkManagement_IpHelper" "Win32_Networking" "Win32_Networking_WinSock" "Win32_Security" "Win32_Security_Authentication" "Win32_Security_Authentication_Identity" "Win32_Security_Credentials" "Win32_Security_Cryptography" "Win32_Storage" "Win32_Storage_FileSystem" "Win32_System" "Win32_System_Com" "Win32_System_Console" "Win32_System_Diagnostics" "Win32_System_Diagnostics_Debug" "Win32_System_IO" "Win32_System_LibraryLoader" "Win32_System_Memory" "Win32_System_Threading" "Win32_System_WindowsProgramming" "Win32_UI" "Win32_UI_Shell" "default" ];
+        resolvedDefaultFeatures = [ "Wdk" "Wdk_Foundation" "Wdk_Storage" "Wdk_Storage_FileSystem" "Win32" "Win32_Foundation" "Win32_NetworkManagement" "Win32_NetworkManagement_IpHelper" "Win32_Networking" "Win32_Networking_WinSock" "Win32_Security" "Win32_Security_Authentication" "Win32_Security_Authentication_Identity" "Win32_Security_Credentials" "Win32_Security_Cryptography" "Win32_Storage" "Win32_Storage_FileSystem" "Win32_System" "Win32_System_Com" "Win32_System_Console" "Win32_System_Diagnostics" "Win32_System_Diagnostics_Debug" "Win32_System_IO" "Win32_System_LibraryLoader" "Win32_System_Memory" "Win32_System_Threading" "Win32_System_WindowsProgramming" "Win32_UI" "Win32_UI_Input" "Win32_UI_Input_KeyboardAndMouse" "Win32_UI_Shell" "default" ];
       };
       "windows-targets 0.48.5" = rec {
         crateName = "windows-targets";

tvix/castore/Cargo.toml

@@ -14,6 +14,7 @@ data-encoding = "2.3.3"
 digest = "0.10.7"
 fastcdc = { version = "3.1.0", features = ["tokio"] }
 futures = "0.3.30"
+indicatif = "0.17.8"
 lazy_static = "1.4.0"
 object_store = { version = "0.9.1", features = ["http"] }
 parking_lot = "0.12.1"
@@ -28,6 +29,7 @@ tokio = { version = "1.32.0", features = ["fs", "macros", "net", "rt", "rt-multi
 tonic = "0.11.0"
 tower = "0.4.13"
 tracing = "0.1.37"
+tracing-indicatif = "0.3.6"
 url = "2.4.0"
 walkdir = "2.4.0"
 zstd = "0.13.0"

tvix/castore/src/import/fs.rs

@@ -7,6 +7,8 @@ use std::os::unix::ffi::OsStringExt;
 use std::os::unix::fs::MetadataExt;
 use std::os::unix::fs::PermissionsExt;
 use tracing::instrument;
+use tracing::Span;
+use tracing_indicatif::span_ext::IndicatifSpanExt;
 use walkdir::DirEntry;
 use walkdir::WalkDir;
 
@@ -37,6 +39,7 @@ where
     BS: BlobService + Clone,
     DS: DirectoryService,
 {
+    Span::current().pb_start();
     let iter = WalkDir::new(path.as_ref())
         .follow_links(false)
         .follow_root_links(false)
@@ -44,7 +47,17 @@ where
         .into_iter();
 
     let entries = dir_entries_to_ingestion_stream(blob_service, iter, path.as_ref());
-    ingest_entries(directory_service, entries).await
+    ingest_entries(
+        directory_service,
+        entries.inspect(|e| {
+            if let Ok(e) = e {
+                let s = Span::current();
+                s.pb_inc(1);
+                s.pb_set_message(&format!("Ingesting {}", e.path()));
+            }
+        }),
+    )
+    .await
 }
 
 /// Converts an iterator of [walkdir::DirEntry]s into a stream of ingestion entries.

tvix/castore/src/import/mod.rs

@@ -14,6 +14,8 @@ use crate::proto::FileNode;
 use crate::proto::SymlinkNode;
 use crate::B3Digest;
 use futures::{Stream, StreamExt};
+use tracing::Span;
+use tracing_indicatif::span_ext::IndicatifSpanExt;
 
 use tracing::Level;
 
@@ -44,7 +46,7 @@ pub mod fs;
 /// map and upload it to the [DirectoryService] through a lazily created [DirectoryPutter].
 ///
 /// On success, returns the root node.
-#[instrument(skip_all, ret(level = Level::TRACE), err)]
+#[instrument(skip_all, fields(indicatif.pb_show=1), ret(level = Level::TRACE), err)]
 pub async fn ingest_entries<DS, S, E>(
     directory_service: DS,
     mut entries: S,
@@ -58,6 +60,8 @@ where
     let mut directories: HashMap<PathBuf, Directory> = HashMap::default();
     let mut maybe_directory_putter: Option<Box<dyn DirectoryPutter>> = None;
 
+    Span::current().pb_start();
+
     let root_node = loop {
         let mut entry = entries
             .next()

tvix/glue/Cargo.toml

@@ -26,6 +26,7 @@ serde = "1.0.195"
 serde_json = "1.0"
 sha2 = "0.10.8"
 sha1 = "0.10.6"
+tracing-indicatif = "0.3.6"
 md-5 = "0.10.6"
 url = "2.4.0"
 walkdir = "2.4.0"

tvix/store/Cargo.toml

@@ -43,6 +43,8 @@ walkdir = "2.4.0"
 reqwest = { version = "0.11.22", features = ["rustls-tls-native-roots", "stream"], default-features = false }
 lru = "0.12.3"
 parking_lot = "0.12.2"
+indicatif = "0.17.8"
+tracing-indicatif = "0.3.6"
 
 [dependencies.tonic-reflection]
 optional = true

tvix/store/src/bin/tvix-store.rs

@@ -4,6 +4,7 @@ use clap::Subcommand;
 use futures::future::try_join_all;
 use futures::StreamExt;
 use futures::TryStreamExt;
+use indicatif::ProgressStyle;
 use nix_compat::path_info::ExportedPathInfo;
 use serde::Deserialize;
 use serde::Serialize;
@@ -14,10 +15,13 @@ use tokio_listener::SystemOptions;
 use tokio_listener::UserOptions;
 use tonic::transport::Server;
 use tracing::info;
+use tracing::info_span;
+use tracing::instrument;
 use tracing::Level;
-use tracing_subscriber::EnvFilter;
+use tracing::Span;
-use tracing_subscriber::Layer;
+use tracing_indicatif::filter::IndicatifFilter;
-use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
+use tracing_indicatif::{span_ext::IndicatifSpanExt, IndicatifLayer};
+use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter, Layer};
 use tvix_castore::import::fs::ingest_path;
 use tvix_store::nar::NarCalculationService;
 use tvix_store::proto::NarInfo;
@@ -31,6 +35,20 @@ use tvix_store::pathinfoservice::PathInfoService;
 use tvix_store::proto::path_info_service_server::PathInfoServiceServer;
 use tvix_store::proto::GRPCPathInfoServiceWrapper;
 
+use lazy_static::lazy_static;
+
+// FUTUREWORK: move this to tracing crate
+lazy_static! {
+    pub static ref PB_PROGRESS_STYLE: ProgressStyle = ProgressStyle::with_template(
+        "{span_child_prefix}{bar:30} {wide_msg} [{elapsed_precise}]  {pos:>7}/{len:7}"
+    )
+    .expect("invalid progress template");
+    pub static ref PB_SPINNER_STYLE: ProgressStyle = ProgressStyle::with_template(
+        "{span_child_prefix}{spinner} {wide_msg} [{elapsed_precise}]  {pos:>7}/{len:7}"
+    )
+    .expect("invalid progress template");
+}
+
 #[cfg(any(feature = "fuse", feature = "virtiofs"))]
 use tvix_store::pathinfoservice::make_fs;
 
@@ -212,16 +230,20 @@ fn default_threads() -> usize {
 }
 
 #[tokio::main]
+#[instrument(fields(indicatif.pb_show=1))]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let cli = Cli::parse();
 
     // configure log settings
     let level = cli.log_level.unwrap_or(Level::INFO);
 
+    let indicatif_layer = IndicatifLayer::new().with_progress_style(PB_SPINNER_STYLE.clone());
+
     // Set up the tracing subscriber.
-    let subscriber = tracing_subscriber::registry().with(
+    let subscriber = tracing_subscriber::registry()
+        .with(
             tracing_subscriber::fmt::Layer::new()
-            .with_writer(std::io::stderr)
+                .with_writer(indicatif_layer.get_stderr_writer())
                 .compact()
                 .with_filter(
                     EnvFilter::builder()
@@ -229,7 +251,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                         .from_env()
                         .expect("invalid RUST_LOG"),
                 ),
-    );
+        )
+        .with(indicatif_layer.with_filter(
+            // only show progress for spans with indicatif.pb_show field being set
+            IndicatifFilter::new(false),
+        ));
 
     // Add the otlp layer (when otlp is enabled, and it's not disabled in the CLI)
     // then init the registry.
@@ -355,9 +381,19 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             let nar_calculation_service: Arc<dyn NarCalculationService> =
                 nar_calculation_service.into();
 
+            let root_span = {
+                let s = Span::current();
+                s.pb_set_style(&PB_PROGRESS_STYLE);
+                s.pb_set_message("Importing paths");
+                s.pb_set_length(paths.len() as u64);
+                s.pb_start();
+                s
+            };
+
             let tasks = paths
                 .into_iter()
                 .map(|path| {
+                    let paths_span = root_span.clone();
                     tokio::task::spawn({
                         let blob_service = blob_service.clone();
                         let directory_service = directory_service.clone();
@@ -380,6 +416,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                                     println!("{}", output_path.to_absolute_path());
                                 }
                             }
+                            paths_span.pb_inc(1);
                         }
                     })
                 })
@@ -416,15 +453,26 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             // Arc the PathInfoService, as we clone it .
             let path_info_service: Arc<dyn PathInfoService> = path_info_service.into();
 
+            let lookups_span = info_span!(
+                "lookup pathinfos",
+                "indicatif.pb_show" = tracing::field::Empty
+            );
+            lookups_span.pb_set_length(reference_graph.closure.len() as u64);
+            lookups_span.pb_set_style(&PB_PROGRESS_STYLE);
+            lookups_span.pb_start();
+
             // From our reference graph, lookup all pathinfos that might exist.
             let elems: Vec<_> = futures::stream::iter(reference_graph.closure)
                 .map(|elem| {
                     let path_info_service = path_info_service.clone();
                     async move {
-                        path_info_service
+                        let resp = path_info_service
                             .get(*elem.path.digest())
                             .await
-                            .map(|resp| (elem, resp))
+                            .map(|resp| (elem, resp));
+
+                        Span::current().pb_inc(1);
+                        resp
                     }
                 })
                 .buffer_unordered(50)