ignore default config value

.gitignore

@@ -3,4 +3,5 @@
 /cache
 flamegraph*.svg
 perf.data*
-dhat.out.*
+dhat.out.*
+settings.yaml

build.rs

@@ -1,10 +1,25 @@
 use std::error::Error;
+use std::process::Command;
 
 use vergen::{vergen, Config, ShaKind};
 
 fn main() -> Result<(), Box<dyn Error>> {
+    // Initialize vergen stuff
     let mut config = Config::default();
     *config.git_mut().sha_kind_mut() = ShaKind::Short;
     vergen(config)?;
+
+    // Initialize SQL stuff
+    let project_root = std::env::var("CARGO_MANIFEST_DIR").unwrap();
+    Command::new("mkdir")
+        .args(["cache", "--parents"])
+        .current_dir(&project_root)
+        .output()?;
+
+    Command::new("sqlite3")
+        .args(["cache/metadata.sqlite", include_str!("db_queries/init.sql")])
+        .current_dir(&project_root)
+        .output()?;
+
     Ok(())
 }

init_cache.sh

@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-
-# This script needs to be run once in order for compile time macros to not
-# complain about a missing DB
-
-# We can trust that our program will initialize the db at runtime the same way
-# as it pulls from the same file for initialization
-
-mkdir cache
-sqlite3 cache/metadata.sqlite < db_queries/init.sql

settings.sample.yaml

@@ -18,6 +18,8 @@
 # MangaDex@Home configuration file
 # We are pleased to have you here
 # May fate stay the night with you!
+#
+# Default values are commented out.
 
 # The size in mebibytes of the cache
 # You can use megabytes instead in a pinch,
@@ -25,37 +27,31 @@
 max_cache_size_in_mebibytes: 0
 
 server_settings:
-  # The client secret
-  # Keep this secret at all costs :P
-  secret: ina_is_the_cutest
+  # The client secret. Keep this secret at all costs :P
+  secret: suichan wa kyou mo kawaii!
 
-  # The port for the webserver to listen on
-  # 443 is recommended for maximum appeal
-  port: 443
+  # The port for the webserver to listen on. 443 is recommended for max appeal.
+  # port: 443
 
-  # This controls the value the server receives
-  # for your upload speed
+  # This controls the value the server receives for your upload speed.
   external_max_kilobits_per_second: 0
 
   #
-  # Stuff that you probably don't need to change
+  # Advanced settings
   #
 
-  # The external port to broadcast to the backend
-  # Keep this at 0 unless you know what you're doing
-  # 0 means broadcast the same value as `port`
-  external_port: 0
+  # The external hostname to listen on. Keep this at 0.0.0.0 unless you know
+  # what you're doing.
+  # hostname: 0.0.0.0
 
-  # How long to wait for the graceful shutdown (Ctrl-C or SIGINT)
-  # This is rounded to a multiple of 5 seconds
-  graceful_shutdown_wait_seconds: 60
+  # The external port to broadcast to the backend. Keep this at 0 unless you
+  # know what you're doing. 0 means broadcast the same value as `port`.
+  # external_port: 0
 
-  # The external hostname to listen on
-  # Keep this at 0.0.0.0 unless you know what you're doing
-  hostname: 0.0.0.0
+  # How long to wait at most for the graceful shutdown (Ctrl-C or SIGINT).
+  # graceful_shutdown_wait_seconds: 60
 
-  # The external ip to broadcast to the webserver
-  # The default of null means the backend will infer it
-  # from where it was sent from, which may fail in the
-  # presence of multiple IPs
-  external_ip: ~
+  # The external ip to broadcast to the webserver. The default of null (~) means
+  # the backend will infer it from where it was sent from, which may fail in the
+  # presence of multiple IPs.
+  # external_ip: ~

src/cache/fs.rs

@@ -111,21 +111,21 @@ pub(super) async fn read_file(
                 return None;
             }
 
-            let header = if let Some(header) = Header::from_slice(&header_bytes) {
+            let file_header = if let Some(header) = Header::from_slice(&header_bytes) {
                 header
             } else {
                 warn!("Found file, but encrypted header was invalid. Assuming corrupted!");
                 return None;
             };
 
-            let secret_stream = if let Ok(stream) = SecretStream::init_pull(&header, key) {
+            let secret_stream = if let Ok(stream) = SecretStream::init_pull(&file_header, key) {
                 stream
             } else {
                 warn!("Failed to init secret stream with key and header. Assuming corrupted!");
                 return None;
             };
 
-            maybe_header = Some(header);
+            maybe_header = Some(file_header);
 
             reader = Some(Box::pin(EncryptedDiskReader::new(file, secret_stream)));
         }

src/config.rs

@@ -2,8 +2,8 @@ use std::fmt::{Display, Formatter};
 use std::fs::{File, OpenOptions};
 use std::hint::unreachable_unchecked;
 use std::io::{ErrorKind, Write};
-use std::net::{IpAddr, SocketAddr};
-use std::num::{NonZeroU16, NonZeroU64};
+use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+use std::num::NonZeroU16;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -64,7 +64,7 @@ pub fn load_config() -> Result<Config, serde_yaml::Error> {
     Ok(config)
 }
 
-/// Represents a fully parsed config file.
+/// Represents a fully parsed config, from a variety of sources.
 pub struct Config {
     pub cache_type: CacheType,
     pub cache_path: PathBuf,
@@ -75,27 +75,93 @@ pub struct Config {
     pub bind_address: SocketAddr,
     pub external_address: Option<SocketAddr>,
     pub ephemeral_disk_encryption: bool,
-    pub unstable_options: Vec<UnstableOptions>,
     pub network_speed: KilobitsPerSecond,
     pub disk_quota: Mebibytes,
     pub memory_quota: Mebibytes,
+    pub unstable_options: Vec<UnstableOptions>,
     pub override_upstream: Option<Url>,
+    pub enable_metrics: bool,
 }
 
 impl Config {
     fn from_cli_and_file(cli_args: CliArgs, file_args: YamlArgs) -> Self {
+        let file_extended_options = file_args.extended_options.unwrap_or_default();
+
         let log_level = match (cli_args.quiet, cli_args.verbose) {
             (n, _) if n > 2 => LevelFilter::Off,
             (2, _) => LevelFilter::Error,
             (1, _) => LevelFilter::Warn,
             // Use log level from file if no flags were provided to CLI
-            (0, 0) => file_args.extended_options.logging_level,
+            (0, 0) => file_extended_options
+                .logging_level
+                .unwrap_or(LevelFilter::Info),
             (_, 1) => LevelFilter::Debug,
             (_, n) if n > 1 => LevelFilter::Trace,
             // compiler can't figure it out
             _ => unsafe { unreachable_unchecked() },
         };
-        todo!()
+
+        let bind_port = cli_args
+            .port
+            .unwrap_or(file_args.server_settings.port)
+            .get();
+
+        // This needs to be outside because rust isn't smart enough yet to
+        // realize a disjointed borrow of a moved value is ok. This will be
+        // fixed in Rust 2021.
+        let external_port = file_args
+            .server_settings
+            .external_port
+            .map_or(bind_port, Port::get);
+
+        Self {
+            cache_type: cli_args
+                .cache_type
+                .or(file_extended_options.cache_type)
+                .unwrap_or_default(),
+            cache_path: cli_args
+                .cache_path
+                .or(file_extended_options.cache_path)
+                .unwrap_or_else(|| PathBuf::from_str("./cache").unwrap()),
+            shutdown_timeout: file_args
+                .server_settings
+                .graceful_shutdown_wait_seconds
+                .unwrap_or(unsafe { NonZeroU16::new_unchecked(60) }),
+            log_level,
+            // secret should never be in CLI
+            client_secret: file_args.server_settings.secret,
+            port: cli_args.port.unwrap_or(file_args.server_settings.port),
+            bind_address: SocketAddr::new(
+                file_args
+                    .server_settings
+                    .hostname
+                    .unwrap_or_else(|| IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0))),
+                bind_port,
+            ),
+            external_address: file_args
+                .server_settings
+                .external_ip
+                .map(|ip_addr| SocketAddr::new(ip_addr, external_port)),
+            ephemeral_disk_encryption: cli_args
+                .ephemeral_disk_encryption
+                .or(file_extended_options.ephemeral_disk_encryption)
+                .unwrap_or_default(),
+            network_speed: cli_args
+                .network_speed
+                .unwrap_or(file_args.server_settings.external_max_kilobits_per_second),
+            disk_quota: cli_args
+                .disk_quota
+                .unwrap_or(file_args.max_cache_size_in_mebibytes),
+            memory_quota: cli_args
+                .memory_quota
+                .or(file_extended_options.memory_quota)
+                .unwrap_or_default(),
+            enable_metrics: file_extended_options.enable_metrics.unwrap_or_default(),
+
+            // Unstable options (and related) should never be in yaml config
+            unstable_options: cli_args.unstable_options,
+            override_upstream: cli_args.override_upstream,
+        }
     }
 }
 
@@ -105,13 +171,14 @@ struct YamlArgs {
     max_cache_size_in_mebibytes: Mebibytes,
     server_settings: YamlServerSettings,
     // This implementation custom options
-    extended_options: YamlExtendedOptions,
+    extended_options: Option<YamlExtendedOptions>,
 }
 
 // Naming is legacy
 #[derive(Deserialize)]
 struct YamlServerSettings {
     secret: ClientSecret,
+    #[serde(default)]
     port: Port,
     external_max_kilobits_per_second: KilobitsPerSecond,
     external_port: Option<Port>,
@@ -124,21 +191,14 @@ struct YamlServerSettings {
 #[derive(Deserialize, Serialize)]
 pub struct ClientSecret(String);
 
-#[derive(Deserialize)]
+#[derive(Deserialize, Default)]
 struct YamlExtendedOptions {
-    memory_quota: Option<NonZeroU64>,
-    #[serde(default)]
-    cache_type: CacheType,
-    #[serde(default)]
-    ephemeral_disk_encryption: bool,
-    #[serde(default)]
-    enable_metrics: bool,
-    #[serde(default = "default_logging_level")]
-    logging_level: LevelFilter,
-}
-
-const fn default_logging_level() -> LevelFilter {
-    LevelFilter::Info
+    memory_quota: Option<Mebibytes>,
+    cache_type: Option<CacheType>,
+    ephemeral_disk_encryption: Option<bool>,
+    enable_metrics: Option<bool>,
+    logging_level: Option<LevelFilter>,
+    cache_path: Option<PathBuf>,
 }
 
 #[derive(Deserialize, Copy, Clone)]
@@ -172,25 +232,25 @@ impl Default for CacheType {
 #[clap(version = crate_version!(), author = crate_authors!(), about = crate_description!())]
 struct CliArgs {
     /// The port to listen on.
-    #[clap(short, long, default_value = "42069")]
-    pub port: Port,
-    /// How large, in bytes, the in-memory cache should be. Note that this does
-    /// not include runtime memory usage.
+    #[clap(short, long)]
+    pub port: Option<Port>,
+    /// How large, in mebibytes, the in-memory cache should be. Note that this
+    /// does not include runtime memory usage.
     #[clap(long)]
-    pub memory_quota: Option<NonZeroU64>,
-    /// How large, in bytes, the on-disk cache should be. Note that actual
+    pub memory_quota: Option<Mebibytes>,
+    /// How large, in mebibytes, the on-disk cache should be. Note that actual
     /// values may be larger for metadata information.
     #[clap(long)]
-    pub disk_quota: u64,
+    pub disk_quota: Option<Mebibytes>,
     /// Sets the location of the disk cache.
-    #[clap(long, default_value = "./cache")]
-    pub cache_path: PathBuf,
+    #[clap(long)]
+    pub cache_path: Option<PathBuf>,
     /// The network speed to advertise to Mangadex@Home control server.
     #[clap(long)]
-    pub network_speed: NonZeroU64,
+    pub network_speed: Option<KilobitsPerSecond>,
     /// Changes verbosity. Default verbosity is INFO, while increasing counts of
     /// verbose flags increases the verbosity to DEBUG and TRACE, respectively.
-    #[clap(short, long, parse(from_occurrences))]
+    #[clap(short, long, parse(from_occurrences), conflicts_with = "quiet")]
     pub verbose: usize,
     /// Changes verbosity. Default verbosity is INFO, while increasing counts of
     /// quiet flags decreases the verbosity to WARN, ERROR, and no logs,
@@ -205,11 +265,11 @@ struct CliArgs {
     /// encrypted with a key generated at runtime. There are implications to
     /// performance, privacy, and usability with this flag enabled.
     #[clap(short, long)]
-    pub ephemeral_disk_encryption: bool,
+    pub ephemeral_disk_encryption: Option<bool>,
     #[clap(short, long)]
     pub config_path: Option<PathBuf>,
-    #[clap(default_value = "on_disk")]
-    pub cache_type: CacheType,
+    #[clap(short = 't', long)]
+    pub cache_type: Option<CacheType>,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]

src/main.rs

@@ -93,7 +93,9 @@ async fn main() -> Result<(), Box<dyn Error>> {
         ENCRYPTION_KEY.set(gen_key()).unwrap();
     }
 
-    metrics::init();
+    if config.enable_metrics {
+        metrics::init();
+    }
 
     // HTTP Server init
 

src/units.rs

@@ -1,5 +1,5 @@
 use std::fmt::Display;
-use std::num::{NonZeroU16, NonZeroU64};
+use std::num::{NonZeroU16, NonZeroU64, ParseIntError};
 use std::str::FromStr;
 
 use serde::{Deserialize, Serialize};
@@ -8,6 +8,18 @@ use serde::{Deserialize, Serialize};
 #[derive(Serialize, Deserialize, Debug, Clone, Copy)]
 pub struct Port(NonZeroU16);
 
+impl Port {
+    pub const fn get(self) -> u16 {
+        self.0.get()
+    }
+}
+
+impl Default for Port {
+    fn default() -> Self {
+        Self(unsafe { NonZeroU16::new_unchecked(443) })
+    }
+}
+
 impl FromStr for Port {
     type Err = <NonZeroU16 as FromStr>::Err;
 
@@ -25,9 +37,11 @@ impl Display for Port {
 #[derive(Copy, Clone, Serialize, Deserialize, Default, Debug, Hash, Eq, PartialEq)]
 pub struct Mebibytes(usize);
 
-impl Mebibytes {
-    pub const fn get(self) -> usize {
-        self.0
+impl FromStr for Mebibytes {
+    type Err = ParseIntError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        s.parse::<usize>().map(Self)
     }
 }
 
@@ -48,6 +62,14 @@ impl From<Mebibytes> for Bytes {
 #[derive(Copy, Clone, Deserialize, Debug, Hash, Eq, PartialEq)]
 pub struct KilobitsPerSecond(NonZeroU64);
 
+impl FromStr for KilobitsPerSecond {
+    type Err = ParseIntError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        s.parse::<NonZeroU64>().map(Self)
+    }
+}
+
 #[derive(Copy, Clone, Serialize, Debug, Hash, Eq, PartialEq)]
 pub struct BytesPerSecond(NonZeroU64);