Update lockfile; drop Python 3.6 support

Python 3.6 EOLed at the end of 2021, see https://endoflife.date/python.
(pyO3 was refusing to build against 3.6).

.dockerignore

@@ -0,0 +1,3 @@
+.git
+.github
+/target

.github/CODEOWNERS

@@ -0,0 +1,2 @@
+# Automatically request reviews from the synapse-core team when a pull request comes in.
+* @matrix-org/synapse-core

Cargo.toml

@@ -9,9 +9,7 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-clap = "2.33.0"
 indicatif = "0.16.0"
-jemallocator = "0.3.2"
 openssl = "0.10.32"
 postgres = "0.19.0"
 postgres-openssl = "0.5.0"
@@ -20,7 +18,7 @@ rayon = "1.3.0"
 string_cache = "0.8.0"
 env_logger = "0.9.0"
 log = "0.4.14"
-pyo3-log = "0.4.0"
+pyo3-log = "0.6.0"
 log-panics = "2.0.0"
 
 [dependencies.state-map]
@@ -30,11 +28,19 @@ git = "https://github.com/matrix-org/rust-matrix-state-map"
 [lib]
 crate-type = ["cdylib", "rlib"]
 
+[dependencies.clap]
+version = "3.1.14"
+features = ["cargo"]
+
 [dependencies.pyo3]
-version = "0.14.1"
-features = ["extension-module","abi3-py36"]
+version = "0.16.4"
+features = ["extension-module"]
+
+[dependencies.tikv-jemallocator]
+version = "0.5.0"
+optional = true
 
 [features]
 default = ["jemalloc"]
-jemalloc = []
+jemalloc = ["tikv-jemallocator"]
 no-progress-bars = []

Dockerfile

@@ -0,0 +1,22 @@
+FROM rust:alpine AS builder
+
+RUN apk add python3 musl-dev pkgconfig openssl-dev make
+
+ENV RUSTFLAGS="-C target-feature=-crt-static"
+
+WORKDIR /opt/synapse-compressor/
+
+COPY . .
+
+RUN cargo build
+
+WORKDIR /opt/synapse-compressor/synapse_auto_compressor/
+
+RUN cargo build
+
+FROM alpine
+
+RUN apk add --no-cache libgcc
+
+COPY --from=builder /opt/synapse-compressor/target/debug/synapse_compress_state /usr/local/bin/synapse_compress_state
+COPY --from=builder /opt/synapse-compressor/target/debug/synapse_auto_compressor /usr/local/bin/synapse_auto_compressor

README.md

@@ -197,7 +197,7 @@ $ docker-compose down
 # Using the synapse_compress_state library
 
 If you want to use the compressor in another project, it is recomended that you
-use jemalloc `https://github.com/gnzlbg/jemallocator`.
+use jemalloc `https://github.com/tikv/jemallocator`.
 
 To prevent the progress bars from being shown, use the `no-progress-bars` feature.
 (See `synapse_auto_compressor/Cargo.toml` for an example)

compressor_integration_tests/tests/compressor_config_tests.rs

@@ -46,10 +46,11 @@ fn run_succeeds_without_crashing() {
     let transactions = true;
     let graphs = false;
     let commit_changes = false;
+    let verify = true;
 
     let config = Config::new(
-        db_url.clone(),
-        room_id.clone(),
+        db_url,
+        room_id,
         output_file,
         min_state_group,
         groups_to_compress,
@@ -59,6 +60,7 @@ fn run_succeeds_without_crashing() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -94,6 +96,7 @@ fn changes_commited_if_no_min_saved_rows() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config = Config::new(
         db_url,
@@ -107,6 +110,7 @@ fn changes_commited_if_no_min_saved_rows() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -160,6 +164,7 @@ fn changes_commited_if_min_saved_rows_exceeded() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config = Config::new(
         db_url,
@@ -173,6 +178,7 @@ fn changes_commited_if_min_saved_rows_exceeded() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -227,6 +233,7 @@ fn changes_not_commited_if_fewer_than_min_saved_rows() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config = Config::new(
         db_url,
@@ -240,6 +247,7 @@ fn changes_not_commited_if_fewer_than_min_saved_rows() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -280,6 +288,7 @@ fn run_panics_if_invalid_db_url() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config = Config::new(
         db_url,
@@ -293,6 +302,7 @@ fn run_panics_if_invalid_db_url() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -336,6 +346,7 @@ fn run_only_affects_given_room_id() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config = Config::new(
         db_url,
@@ -349,6 +360,7 @@ fn run_only_affects_given_room_id() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -406,6 +418,7 @@ fn run_respects_groups_to_compress() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config = Config::new(
         db_url,
@@ -419,6 +432,7 @@ fn run_respects_groups_to_compress() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
@@ -492,6 +506,7 @@ fn run_is_idempotent_when_run_on_whole_room() {
     let transactions = true;
     let graphs = false;
     let commit_changes = true;
+    let verify = true;
 
     let config1 = Config::new(
         db_url.clone(),
@@ -505,21 +520,23 @@ fn run_is_idempotent_when_run_on_whole_room() {
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 
     let config2 = Config::new(
-        db_url.clone(),
-        room_id.clone(),
+        db_url,
+        room_id,
         output_file2,
         min_state_group,
         groups_to_compress,
         min_saved_rows,
         max_state_group,
-        level_sizes.clone(),
+        level_sizes,
         transactions,
         graphs,
         commit_changes,
+        verify,
     )
     .unwrap();
 

compressor_integration_tests/tests/compressor_continue_run_tests.rs

@@ -56,7 +56,7 @@ fn continue_run_called_twice_same_as_run() {
 
     let start = Some(6);
     let chunk_size = 7;
-    let level_info = chunk_stats_1.new_level_info.clone();
+    let level_info = chunk_stats_1.new_level_info;
 
     // Run the compressor with those settings
     let chunk_stats_2 = continue_run(start, chunk_size, &db_url, &room_id, &level_info).unwrap();

src/compressor.rs

@@ -181,12 +181,11 @@ impl<'a> Compressor<'a> {
             panic!("Can only call `create_new_tree` once");
         }
 
-        let pb: ProgressBar;
-        if cfg!(feature = "no-progress-bars") {
-            pb = ProgressBar::hidden();
+        let pb = if cfg!(feature = "no-progress-bars") {
+            ProgressBar::hidden()
         } else {
-            pb = ProgressBar::new(self.original_state_map.len() as u64);
-        }
+            ProgressBar::new(self.original_state_map.len() as u64)
+        };
         pb.set_style(
             ProgressStyle::default_bar().template("[{elapsed_precise}] {bar} {pos}/{len} {msg}"),
         );

src/compressor/compressor_tests.rs

@@ -96,11 +96,7 @@ fn create_new_tree_does_nothing_if_already_compressed() {
         let pred_group = initial_edges.get(&i);
 
         // Need Option<i64> not Option<&i64>
-        let prev;
-        match pred_group {
-            Some(i) => prev = Some(*i),
-            None => prev = None,
-        }
+        let prev = pred_group.copied();
 
         // insert that edge into the initial map
         initial.insert(

src/compressor/level_tests.rs

@@ -54,7 +54,7 @@ fn get_head_returns_head() {
 #[test]
 fn has_space_returns_true_if_empty() {
     let l = Level::new(15);
-    assert_eq!(l.has_space(), true);
+    assert!(l.has_space());
 }
 
 #[test]
@@ -65,7 +65,7 @@ fn has_space_returns_true_if_part_full() {
     l.update(1, true);
     l.update(143, true);
     l.update(15, true);
-    assert_eq!(l.has_space(), true);
+    assert!(l.has_space());
 }
 
 #[test]
@@ -76,5 +76,5 @@ fn has_space_returns_false_if_full() {
     l.update(3, true);
     l.update(4, true);
     l.update(5, true);
-    assert_eq!(l.has_space(), false);
+    assert!(!l.has_space());
 }

src/compressor/stats_tests.rs

@@ -145,11 +145,7 @@ fn stats_correct_if_no_changes() {
         let pred_group = initial_edges.get(&i);
 
         // Need Option<i64> not Option<&i64>
-        let prev;
-        match pred_group {
-            Some(i) => prev = Some(*i),
-            None => prev = None,
-        }
+        let prev = pred_group.copied();
 
         // insert that edge into the initial map
         initial.insert(

src/database.rs

@@ -372,12 +372,11 @@ fn get_initial_data_from_db(
     // Copy the data from the database into a map
     let mut state_group_map: BTreeMap<i64, StateGroupEntry> = BTreeMap::new();
 
-    let pb: ProgressBar;
-    if cfg!(feature = "no-progress-bars") {
-        pb = ProgressBar::hidden();
+    let pb = if cfg!(feature = "no-progress-bars") {
+        ProgressBar::hidden()
     } else {
-        pb = ProgressBar::new_spinner();
-    }
+        ProgressBar::new_spinner()
+    };
     pb.set_style(
         ProgressStyle::default_spinner().template("{spinner} [{elapsed}] {pos} rows retrieved"),
     );
@@ -537,12 +536,11 @@ pub fn send_changes_to_db(
     debug!("Writing changes...");
 
     // setup the progress bar
-    let pb: ProgressBar;
-    if cfg!(feature = "no-progress-bars") {
-        pb = ProgressBar::hidden();
+    let pb = if cfg!(feature = "no-progress-bars") {
+        ProgressBar::hidden()
     } else {
-        pb = ProgressBar::new(old_map.len() as u64);
-    }
+        ProgressBar::new(old_map.len() as u64)
+    };
     pb.set_style(
         ProgressStyle::default_bar().template("[{elapsed_precise}] {bar} {pos}/{len} {msg}"),
     );

src/lib.rs

@@ -23,7 +23,7 @@
 use log::{info, warn, LevelFilter};
 use pyo3::{exceptions, prelude::*};
 
-use clap::{crate_authors, crate_description, crate_name, crate_version, value_t, App, Arg};
+use clap::{crate_authors, crate_description, crate_name, crate_version, Arg, Command};
 use indicatif::{ProgressBar, ProgressStyle};
 use rayon::prelude::*;
 use state_map::StateMap;
@@ -109,18 +109,21 @@ pub struct Config {
     // Whether or not to commit changes to the database automatically
     // N.B. currently assumes transactions is true (to be on the safe side)
     commit_changes: bool,
+    // Whether to verify the correctness of the compressed state groups by
+    // comparing them to the original groups
+    verify: bool,
 }
 
 impl Config {
     /// Build up config from command line arguments
     pub fn parse_arguments() -> Config {
-        let matches = App::new(crate_name!())
+        let matches = Command::new(crate_name!())
         .version(crate_version!())
         .author(crate_authors!("\n"))
         .about(crate_description!())
         .arg(
-            Arg::with_name("postgres-url")
-                .short("p")
+            Arg::new("postgres-url")
+                .short('p')
                 .value_name("POSTGRES_LOCATION")
                 .help("The configruation for connecting to the postgres database.")
                 .long_help(concat!(
@@ -133,8 +136,8 @@ impl Config {
                 .takes_value(true)
                 .required(true),
         ).arg(
-            Arg::with_name("room_id")
-                .short("r")
+            Arg::new("room_id")
+                .short('r')
                 .value_name("ROOM_ID")
                 .help("The room to process")
                 .long_help(concat!(
@@ -144,23 +147,23 @@ impl Config {
                 .takes_value(true)
                 .required(true),
         ).arg(
-            Arg::with_name("min_state_group")
-                .short("b")
+            Arg::new("min_state_group")
+                .short('b')
                 .value_name("MIN_STATE_GROUP")
                 .help("The state group to start processing from (non inclusive)")
                 .takes_value(true)
                 .required(false),
         ).arg(
-            Arg::with_name("min_saved_rows")
-                .short("m")
+            Arg::new("min_saved_rows")
+                .short('m')
                 .value_name("COUNT")
                 .help("Abort if fewer than COUNT rows would be saved")
                 .long_help("If the compressor cannot save this many rows from the database then it will stop early")
                 .takes_value(true)
                 .required(false),
         ).arg(
-            Arg::with_name("groups_to_compress")
-                .short("n")
+            Arg::new("groups_to_compress")
+                .short('n')
                 .value_name("GROUPS_TO_COMPRESS")
                 .help("How many groups to load into memory to compress")
                 .long_help(concat!(
@@ -169,14 +172,14 @@ impl Config {
                 .takes_value(true)
                 .required(false),
         ).arg(
-            Arg::with_name("output_file")
-                .short("o")
+            Arg::new("output_file")
+                .short('o')
                 .value_name("FILE")
                 .help("File to output the changes to in SQL")
                 .takes_value(true),
         ).arg(
-            Arg::with_name("max_state_group")
-                .short("s")
+            Arg::new("max_state_group")
+                .short('s')
                 .value_name("MAX_STATE_GROUP")
                 .help("The maximum state group to process up to")
                 .long_help(concat!(
@@ -185,8 +188,8 @@ impl Config {
                 .takes_value(true)
                 .required(false),
         ).arg(
-            Arg::with_name("level_sizes")
-                .short("l")
+            Arg::new("level_sizes")
+                .short('l')
                 .value_name("LEVELS")
                 .help("Sizes of each new level in the compression algorithm, as a comma separated list.")
                 .long_help(concat!(
@@ -202,27 +205,34 @@ impl Config {
                 .default_value("100,50,25")
                 .takes_value(true),
         ).arg(
-            Arg::with_name("transactions")
-                .short("t")
+            Arg::new("transactions")
+                .short('t')
                 .help("Whether to wrap each state group change in a transaction")
                 .long_help(concat!("If this flag is set then then each change to a particular",
                     " state group is wrapped in a transaction. This should be done if you wish to",
                     " apply the changes while synapse is still running."))
                 .requires("output_file"),
         ).arg(
-            Arg::with_name("graphs")
-                .short("g")
+            Arg::new("graphs")
+                .short('g')
                 .help("Output before and after graphs")
                 .long_help(concat!("If this flag is set then output the node and edge information for",
                     " the state_group directed graph built up from the predecessor state_group links.",
                     " These can be looked at in something like Gephi (https://gephi.org)")),
         ).arg(
-            Arg::with_name("commit_changes")
-                .short("c")
+            Arg::new("commit_changes")
+                .short('c')
                 .help("Commit changes to the database")
                 .long_help(concat!("If this flag is set then the changes the compressor makes will",
                     " be committed to the database. This should be safe to use while synapse is running",
                     " as it assumes by default that the transactions flag is set")),
+        ).arg(
+            Arg::new("no_verify")
+                .short('N')
+                .help("Do not double-check that the compression was performed correctly")
+                .long_help(concat!("If this flag is set then the verification of the compressed",
+                    " state groups, which compares them to the original groups, is skipped. This",
+                    " saves time at the cost of potentially generating mismatched state.")),
         ).get_matches();
 
         let db_url = matches
@@ -253,7 +263,8 @@ impl Config {
             .value_of("max_state_group")
             .map(|s| s.parse().expect("max_state_group must be an integer"));
 
-        let level_sizes = value_t!(matches, "level_sizes", LevelSizes)
+        let level_sizes = matches
+            .value_of_t::<LevelSizes>("level_sizes")
             .unwrap_or_else(|e| panic!("Unable to parse level_sizes: {}", e));
 
         let transactions = matches.is_present("transactions");
@@ -262,6 +273,8 @@ impl Config {
 
         let commit_changes = matches.is_present("commit_changes");
 
+        let verify = !matches.is_present("no_verify");
+
         Config {
             db_url: String::from(db_url),
             output_file,
@@ -274,6 +287,7 @@ impl Config {
             transactions,
             graphs,
             commit_changes,
+            verify,
         }
     }
 }
@@ -372,7 +386,9 @@ pub fn run(mut config: Config) {
         }
     }
 
+    if config.verify {
         check_that_maps_match(&state_group_map, new_state_group_map);
+    }
 
     // If we are given an output file, we output the changes as SQL. If the
     // `transactions` argument is set we wrap each change to a state group in a
@@ -492,12 +508,11 @@ fn output_sql(
 
     info!("Writing changes...");
 
-    let pb: ProgressBar;
-    if cfg!(feature = "no-progress-bars") {
-        pb = ProgressBar::hidden();
+    let pb = if cfg!(feature = "no-progress-bars") {
+        ProgressBar::hidden()
     } else {
-        pb = ProgressBar::new(old_map.len() as u64);
-    }
+        ProgressBar::new(old_map.len() as u64)
+    };
     pb.set_style(
         ProgressStyle::default_bar().template("[{elapsed_precise}] {bar} {pos}/{len} {msg}"),
     );
@@ -607,12 +622,11 @@ fn check_that_maps_match(
 ) {
     info!("Checking that state maps match...");
 
-    let pb: ProgressBar;
-    if cfg!(feature = "no-progress-bars") {
-        pb = ProgressBar::hidden();
+    let pb = if cfg!(feature = "no-progress-bars") {
+        ProgressBar::hidden()
     } else {
-        pb = ProgressBar::new(old_map.len() as u64);
-    }
+        ProgressBar::new(old_map.len() as u64)
+    };
     pb.set_style(
         ProgressStyle::default_bar().template("[{elapsed_precise}] {bar} {pos}/{len} {msg}"),
     );
@@ -695,6 +709,7 @@ impl Config {
         transactions: bool,
         graphs: bool,
         commit_changes: bool,
+        verify: bool,
     ) -> Result<Config, String> {
         let mut output: Option<File> = None;
         if let Some(file) = output_file {
@@ -722,6 +737,7 @@ impl Config {
             transactions,
             graphs,
             commit_changes,
+            verify,
         })
     }
 }
@@ -746,6 +762,7 @@ impl Config {
     transactions = true,
     graphs = false,
     commit_changes = false,
+    verify = true,
 )]
 fn run_compression(
     db_url: String,
@@ -759,6 +776,7 @@ fn run_compression(
     transactions: bool,
     graphs: bool,
     commit_changes: bool,
+    verify: bool,
 ) -> PyResult<()> {
     let config = Config::new(
         db_url,
@@ -772,6 +790,7 @@ fn run_compression(
         transactions,
         graphs,
         commit_changes,
+        verify,
     );
     match config {
         Err(e) => Err(PyErr::new::<exceptions::PyException, _>(e)),
@@ -955,7 +974,6 @@ mod lib_tests {
     #[test]
     fn check_that_maps_match_returns_if_both_empty() {
         check_that_maps_match(&BTreeMap::new(), &BTreeMap::new());
-        assert!(true);
     }
 
     #[test]
@@ -988,7 +1006,6 @@ mod lib_tests {
         }
 
         check_that_maps_match(&old_map, &BTreeMap::new());
-        assert!(true);
     }
 
     #[test]
@@ -1024,7 +1041,6 @@ mod lib_tests {
         }
 
         check_that_maps_match(&BTreeMap::new(), &new_map);
-        assert!(true);
     }
 
     #[test]
@@ -1056,7 +1072,6 @@ mod lib_tests {
         }
 
         check_that_maps_match(&BTreeMap::new(), &old_map.clone());
-        assert!(true);
     }
 
     #[test]
@@ -1119,7 +1134,6 @@ mod lib_tests {
         }
 
         check_that_maps_match(&old_map, &new_map);
-        assert!(true);
     }
 
     #[test]
@@ -1201,7 +1215,6 @@ mod lib_tests {
         );
 
         check_that_maps_match(&old_map, &new_map);
-        assert!(true);
     }
 
     //TODO: tests for correct SQL code produced by output_sql
@@ -1224,6 +1237,7 @@ mod pyo3_tests {
         let transactions = false;
         let graphs = false;
         let commit_changes = false;
+        let verify = true;
 
         let config = Config::new(
             db_url.clone(),
@@ -1237,6 +1251,7 @@ mod pyo3_tests {
             transactions,
             graphs,
             commit_changes,
+            verify,
         )
         .unwrap();
 
@@ -1270,6 +1285,7 @@ mod pyo3_tests {
         let transactions = true;
         let graphs = true;
         let commit_changes = true;
+        let verify = true;
 
         let config = Config::new(
             db_url.clone(),
@@ -1283,11 +1299,12 @@ mod pyo3_tests {
             transactions,
             graphs,
             commit_changes,
+            verify,
         )
         .unwrap();
 
         assert_eq!(config.db_url, db_url);
-        assert!(!config.output_file.is_none());
+        assert!(config.output_file.is_some());
         assert_eq!(config.room_id, room_id);
         assert_eq!(config.min_state_group, Some(3225));
         assert_eq!(config.groups_to_compress, Some(970));

src/main.rs

@@ -18,7 +18,7 @@
 
 #[cfg(feature = "jemalloc")]
 #[global_allocator]
-static GLOBAL: jemallocator::Jemalloc = jemallocator::Jemalloc;
+static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
 
 use log::LevelFilter;
 use std::env;

synapse_auto_compressor/Cargo.toml

@@ -1,11 +1,11 @@
 [package]
 name = "synapse_auto_compressor"
 authors = ["William Ashton"]
-version = "0.1.2"
+version = "0.1.3"
 edition = "2018"
 
 [package.metadata.maturin]
-requires-python = ">=3.6"
+requires-python = ">=3.7"
 project-url = {Source = "https://github.com/matrix-org/rust-synapse-compress-state"}
 classifier = [
     "Development Status :: 4 - Beta",
@@ -13,11 +13,10 @@ classifier = [
 ]
 
 [dependencies]
-clap = "2.33.0"
 openssl = "0.10.32"
 postgres = "0.19.0"
 postgres-openssl = "0.5.0"
-jemallocator = "0.3.2"
+tikv-jemallocator = "0.5.0"
 rand = "0.8.0"
 serial_test = "0.5.1"
 synapse_compress_state = { path = "../", features = ["no-progress-bars"] }
@@ -25,12 +24,16 @@ env_logger = "0.9.0"
 log = "0.4.14"
 log-panics = "2.0.0"
 anyhow = "1.0.42"
-pyo3-log = "0.4.0"
+pyo3-log = "0.6.0"
 
 # Needed for pyo3 support
 [lib]
 crate-type = ["cdylib", "rlib"]
 
+[dependencies.clap]
+version = "3.1.14"
+features = ["cargo"]
+
 [dependencies.pyo3]
-version = "0.14.1"
-features = ["extension-module","abi3-py36"]
+version = "0.16.4"
+features = ["extension-module"]

synapse_auto_compressor/src/main.rs

@@ -17,11 +17,11 @@
 //! continue from where it left off.
 
 #[global_allocator]
-static GLOBAL: jemallocator::Jemalloc = jemallocator::Jemalloc;
+static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
 
-use clap::{crate_authors, crate_description, crate_name, crate_version, value_t, App, Arg};
+use clap::{crate_authors, crate_description, crate_name, crate_version, Arg, Command};
 use log::LevelFilter;
-use std::{env, fs::OpenOptions};
+use std::env;
 use synapse_auto_compressor::{manager, state_saving, LevelInfo};
 
 /// Execution starts here
@@ -29,12 +29,6 @@ fn main() {
     // setup the logger for the synapse_auto_compressor
     // The default can be overwritten with RUST_LOG
     // see the README for more information
-    let log_file = OpenOptions::new()
-        .append(true)
-        .create(true)
-        .open("synapse_auto_compressor.log")
-        .unwrap_or_else(|e| panic!("Error occured while opening the log file: {}", e));
-
     if env::var("RUST_LOG").is_err() {
         let mut log_builder = env_logger::builder();
         // Ensure panics still come through
@@ -47,7 +41,6 @@ fn main() {
     } else {
         // If RUST_LOG was set then use that
         let mut log_builder = env_logger::Builder::from_env("RUST_LOG");
-        log_builder.target(env_logger::Target::Pipe(Box::new(log_file)));
         // Ensure panics still come through
         log_builder.filter_module("panic", LevelFilter::Error);
         log_builder.init();
@@ -57,13 +50,13 @@ fn main() {
     log::info!("synapse_auto_compressor started");
 
     // parse the command line arguments using the clap crate
-    let arguments = App::new(crate_name!())
+    let arguments = Command::new(crate_name!())
         .version(crate_version!())
         .author(crate_authors!("\n"))
         .about(crate_description!())
         .arg(
-            Arg::with_name("postgres-url")
-                .short("p")
+            Arg::new("postgres-url")
+                .short('p')
                 .value_name("POSTGRES_LOCATION")
                 .help("The configruation for connecting to the postgres database.")
                 .long_help(concat!(
@@ -76,8 +69,8 @@ fn main() {
                 .takes_value(true)
                 .required(true),
         ).arg(
-            Arg::with_name("chunk_size")
-                .short("c")
+            Arg::new("chunk_size")
+                .short('c')
                 .value_name("COUNT")
                 .help("The maximum number of state groups to load into memroy at once")
                 .long_help(concat!(
@@ -92,8 +85,8 @@ fn main() {
                 .takes_value(true)
                 .required(true),
         ).arg(
-            Arg::with_name("default_levels")
-                .short("l")
+            Arg::new("default_levels")
+                .short('l')
                 .value_name("LEVELS")
                 .help("Sizes of each new level in the compression algorithm, as a comma separated list.")
                 .long_help(concat!(
@@ -110,8 +103,8 @@ fn main() {
                 .takes_value(true)
                 .required(false),
         ).arg(
-            Arg::with_name("number_of_chunks")
-                .short("n")
+            Arg::new("number_of_chunks")
+                .short('n')
                 .value_name("CHUNKS_TO_COMPRESS")
                 .help("The number of chunks to compress")
                 .long_help(concat!(
@@ -134,7 +127,8 @@ fn main() {
         .expect("A chunk size is required");
 
     // The default structure to use when compressing
-    let default_levels = value_t!(arguments, "default_levels", LevelInfo)
+    let default_levels = arguments
+        .value_of_t::<LevelInfo>("default_levels")
         .unwrap_or_else(|e| panic!("Unable to parse default levels: {}", e));
 
     // The number of rooms to compress with this tool