.gitignore

@@ -1,58 +1,21 @@
-# ---> Ruby
-*.gem
-*.rbc
-/.config
-/coverage/
-/InstalledFiles
-/pkg/
-/spec/reports/
-/spec/examples.txt
-/test/tmp/
-/test/version_tmp/
-/tmp/
+# ---> Rust
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
 
-# Used by dotenv library to load environment variables.
-# .env
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
 
-# Ignore Byebug command history file.
-.byebug_history
+# These are backup files generated by rustfmt
+**/*.rs.bk
 
-## Specific to RubyMotion:
-.dat*
-.repl_history
-build/
-*.bridgesupport
-build-iPhoneOS/
-build-iPhoneSimulator/
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
 
-## Specific to RubyMotion (use of CocoaPods):
-#
-# We recommend against adding the Pods directory to your .gitignore. However
-# you should judge for yourself, the pros and cons are mentioned at:
-# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
-#
-# vendor/Pods/
 
-## Documentation cache and generated files:
-/.yardoc/
-/_yardoc/
-/doc/
-/rdoc/
 
-## Environment normalization:
-/.bundle/
-/vendor/bundle
-/lib/bundler/man/
-
-# for a library or gem, you might want to ignore these files since the code is
-# intended to run in multiple environments; otherwise, check them in:
-# Gemfile.lock
-# .ruby-version
-# .ruby-gemset
-
-# unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
-.rvmrc
-
-# Used by RuboCop. Remote config files pulled in from inherit_from directive.
-# .rubocop-https?--*
+# Added by cargo
 
+/target

.rubocop.yml

@@ -1,11 +0,0 @@
-Layout/EmptyLinesAroundClassBody:
-  EnforcedStyle: empty_lines
-
-Layout/MultilineOperationIndentation:
-  EnforcedStyle: indented
-
-Style/BlockDelimiters:
-  EnforcedStyle: always_braces
-
-Style/RedundantReturn:
-  Enabled: false

.woodpecker.yml

@@ -0,0 +1,30 @@
+pipeline:
+  tests:
+    image: rust:1.63
+    commands:
+      - "cargo test"
+
+  build_release:
+    image: rust:1.63
+    commands:
+      - "cargo install cargo-deb cargo-generate-rpm"
+      - "cargo build --release"
+      - "cargo deb"
+      - "cargo generate-rpm"
+      - "mv target/release/zealot target/release/zealot-${CI_COMMIT_TAG}-linux-x86_64"
+    when:
+      event: tag
+
+  gitea_release:
+    image: plugins/gitea-release
+    settings:
+      api_key:
+        from_secret: gitea_api_key
+      base_url: https://git.metaunix.net
+      files:
+        - "target/release/*${CI_COMMIT_TAG}-linux-x86_64"
+        - "target/debian/zealot*.deb"
+        - "target/generate-rpm/zealot*.rpm"
+      title: "${CI_COMMIT_TAG}"
+    when:
+      event: tag

Cargo.toml

@@ -0,0 +1,42 @@
+[package]
+name = "zealot"
+description = "Bit Goblin automated video transcoding service."
+version = "0.1.3"
+edition = "2021"
+readme = "README.md"
+license = "BSD 2-Clause"
+authors = ["Gregory Ballantine <gballantine@bitgoblin.tech>"]
+
+[dependencies]
+log = "0.4"
+log4rs = "1.1"
+toml = "0.5"
+serde = "1.0"
+serde_derive = "1.0"
+shellexpand = "2.1"
+
+[package.metadata.deb]
+license-file = "LICENSE"
+maintainer-scripts = "build/scripts"
+depends = "ffmpeg (>= 4)"
+section = "video"
+assets = [
+	["target/release/zealot", "usr/bin/zealot", "755"],
+	["build/etc/example.toml", "etc/zealot/example.toml", "644"],
+	["README.md", "usr/share/doc/zealot/README", "644"]
+]
+[package.metadata.deb.systemd-units]
+unit-scripts = "build/debian/service"
+unit-name = "zealot"
+enable = true
+start = true
+
+[package.metadata.generate-rpm]
+assets = [
+  { source = "target/release/zealot", dest = "/usr/bin/zealot", mode = "755" },
+  { source = "build/etc/example.toml", dest = "/etc/zealot/example.toml", mode = "755"},
+  { source = "README.md", dest = "/usr/share/doc/zealot/README", mode = "644"}
+]
+post_install_script = "build/scripts/postinst"
+[package.metadata.generate-rpm.requires]
+ffmpeg = ">= 4"

Gemfile

@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-source "https://rubygems.org"
-
-gem "toml", "~> 0.3.0"
-
-gem "rubocop", "~> 1.35.1", require: false
-

Gemfile.lock

@@ -1,38 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    ast (2.4.2)
-    json (2.6.2)
-    parallel (1.22.1)
-    parser (3.1.2.1)
-      ast (~> 2.4.1)
-    parslet (2.0.0)
-    rainbow (3.1.1)
-    regexp_parser (2.5.0)
-    rexml (3.2.5)
-    rubocop (1.35.1)
-      json (~> 2.3)
-      parallel (~> 1.10)
-      parser (>= 3.1.2.1)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.20.1, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.21.0)
-      parser (>= 3.1.1.0)
-    ruby-progressbar (1.11.0)
-    toml (0.3.0)
-      parslet (>= 1.8.0, < 3.0.0)
-    unicode-display_width (2.2.0)
-
-PLATFORMS
-  x86_64-linux
-
-DEPENDENCIES
-  rubocop (~> 1.35.1)
-  toml (~> 0.3.0)
-
-BUNDLED WITH
-   2.3.19

README.md

@@ -1,3 +1,3 @@
-# Zealot
+# zealot
 
 Bit Goblin video transcoder service

build/debian/service/adept.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Zealot video transcoder service
+
+[Service]
+User=zealot
+Group=zealot
+ExecStart=/usr/bin/zealot
+SuccessExitStatus=143
+
+[Install]
+WantedBy=multi-user.target

build/etc/example.toml

@@ -0,0 +1,11 @@
+# This example transcodes footage to DNxHD 1080p60 for use in video editors like DaVinci Resolve.
+[transcoder]
+repository = "~/zealot" # location of the videos to transcode
+interval = 15
+video_format = "mov" # video container format
+video_codec = "dnxhd" # video codec to use
+video_profile = "dnxhr_hq" # DNxHD has multiple presets for various video qualities
+video_resolution = "1920x1080"
+video_framerate = 60
+video_color = "yuv422p"
+audio_codec = "pcm_s16le" # audio codec to use

build/scripts/postinst

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+GETENT_USER=$(getent passwd zealot)
+GETENT_GROUP=$(getent group zealot)
+
+# Create the zealot user if it doesn't already exist
+if [ "$GETENT_USER" = "" ]; then
+	useradd -r zealot
+else
+	echo "The 'zealot' user already exists, skipping creation."
+fi
+
+# Create the zealot group if it doesn't already exist
+if [ "$GETENT_GROUP" = "" ]; then
+	groupadd zealot
+	usermod -aG zealot zealot
+else
+	echo "The 'zealot' group already exists, skipping creation."
+fi
+
+# Change the directory ownership of /etc
+chown -R zealot:zealot /etc/zealot
+
+#DEBHELPER#
+
+exit 0

log4rs.yaml

@@ -0,0 +1,12 @@
+appenders:
+  stdout:
+    kind: console
+    encoder:
+      pattern: "{d(%+)(utc)} {h({l})}: {m}{n}"
+    filters:
+      - kind: threshold
+        level: info
+root:
+  level: info
+  appenders:
+    - stdout

src/config.rb

@@ -1,32 +0,0 @@
-# frozen_string_literal: true
-
-require 'toml'
-
-# Loads and handles the application configuration.
-class Config
-
-  # class constructor
-  def initialize(config_path)
-    expanded_path = File.expand_path(config_path)
-    @config = TOML.load_file(expanded_path)
-
-    # just in case the user wants to use a tilde (~) in the repository path...
-    @config['transcoder']['repository'] = File.expand_path(get('transcoder.repository'))
-  end
-
-  # returns a configuration value from a dot-seperated string, like 'transcoder.interval'
-  def get(path)
-    value = @config
-    bits = path.split('.')
-    bits.each { |bit|
-      if value.key?(bit)
-        value = value[bit]
-      else
-        abort("Configuration value #{path} does exist.")
-      end
-    }
-
-    return value
-  end
-
-end

src/config.rs

@@ -0,0 +1,34 @@
+use serde_derive::Deserialize;
+use std::fs;
+
+#[derive(Deserialize)]
+pub struct Config {
+  pub transcoder: Transcoder,
+}
+
+impl Config {
+  pub fn new(config_path: &str) -> Config {
+    let resolved_path = shellexpand::tilde(config_path);
+    let config_text = fs::read_to_string(&*resolved_path).unwrap();
+    let c: Config = toml::from_str(&config_text).unwrap();
+    return c;
+  }
+
+  pub fn get_repository(&self) -> String {
+    let resolved_path = shellexpand::tilde(&self.transcoder.repository);
+    return String::from(&*resolved_path);
+  }
+}
+
+#[derive(Deserialize)]
+pub struct Transcoder {
+  pub repository:       String,
+  pub interval:         u16,
+  pub video_format:     String,
+  pub video_codec:      String,
+  pub video_profile:    String,
+  pub video_resolution: String,
+  pub video_framerate:  u8,
+  pub video_color:      String,
+  pub audio_codec:      String,
+}

src/main.rs

@@ -0,0 +1,21 @@
+use log4rs;
+use config::Config;
+use transcoder::repository::Repository;
+use transcoder::transcoder::Transcoder;
+
+mod config;
+mod transcoder;
+mod util;
+
+fn main() {
+  // initialize the log4rs logger
+  log4rs::init_file("./log4rs.yaml", Default::default()).unwrap();
+
+  // create and initialize our config and repository objects
+  let c: Config = Config::new("~/.config/zealot.toml");
+  let r: Repository = Repository::new(&c.get_repository());
+
+  // create and start the video transcoder object
+  let t: Transcoder = Transcoder::new(c, r);
+  t.start();
+}

src/repository.rb

@@ -1,48 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'util'
-
-require 'fileutils'
-
-# Handles anything pertaining to the video file repository.
-class Repository
-
-  def initialize(path)
-    @base_path = path
-
-    # create repository base directory
-    create_directory(@base_path)
-
-    # create sub-directories
-    sub_paths = %w[ingest archive output]
-    sub_paths.each { |p|
-      create_directory(File.join(@base_path, p))
-    }
-  end
-
-  def search_ingest
-    # create our ingest directory path
-    ingest_path = File.join(@base_path, 'ingest')
-    # search for files in ingest; ignore non-files (e.g. directories)
-    ingest_files = Dir.entries(ingest_path).select { |f| File.file? File.join(ingest_path, f) }
-
-    return ingest_files
-  end
-
-  def archive_file(filename)
-    # create source and destination paths for the copy
-    ingest_path = File.join(@base_path, 'ingest', filename)
-    archive_path = File.join(@base_path, 'archive', filename)
-
-    # perform the copy, preserving file attributes
-    FileUtils.cp(ingest_path, archive_path, preserve: true)
-  end
-
-  def cleanup_file(filename)
-    # create ingest path
-    ingest_path = File.join(@base_path, 'ingest', filename)
-    # remove the file
-    FileUtils.remove_file(ingest_path)
-  end
-
-end

src/transcoder.rb

@@ -1,56 +0,0 @@
-# frozen_string_literal: true
-
-require 'pathname'
-
-# Handles the actual transcoding.
-class Transcoder
-
-  def initialize(config, repository)
-    @config = config
-    @repository = repository
-  end
-
-  def start
-    puts 'Starting transcoder...'
-
-    # search for files in ingest
-    ingest_files = @repository.search_ingest
-    ingest_files.each { |ifile|
-      # archive the file
-      @repository.archive_file(ifile)
-      # perform the transcode
-      transcode(ifile)
-      # clean up the file from ingest
-      @repository.cleanup_file(ifile)
-    }
-  end
-
-  def transcode(ingest_file)
-    # create the ingest and output file paths
-    ingest_path = File.join(@config.get('transcoder.repository'), 'ingest', ingest_file)
-    out_name = "#{File.basename(ingest_file, File.extname(ingest_file))}.#{@config.get('transcoder.video_format')}"
-    output_path = File.join(@config.get('transcoder.repository'), 'output', out_name)
-
-    ffmpeg_cmd = build_ffmpeg_cmd(ingest_path, output_path)
-
-    # execute the FFMPEG command
-    puts "Transcoding #{ingest_path} to #{output_path}."
-    result = `#{ffmpeg_cmd} 2>&1 >/dev/null`
-
-    abort "Transcoding failed with error:\n#{result}" if result.end_with?("Conversion failed!\n")
-  end
-
-  def build_ffmpeg_cmd(ingest_path, output_path)
-    # put together the ffmpeg command
-    "/usr/bin/ffmpeg -i #{ingest_path} -y" \
-      " -f #{@config.get('transcoder.video_format')}" \
-      " -c:v #{@config.get('transcoder.video_codec')}" \
-      " -s #{@config.get('transcoder.video_resolution')}" \
-      " -r #{@config.get('transcoder.video_framerate')}" \
-      " -vf 'format=#{@config.get('transcoder.video_color')}'" \
-      " -profile:v #{@config.get('transcoder.video_profile')}" \
-      " -c:a #{@config.get('transcoder.audio_codec')}" \
-      " #{output_path}"
-  end
-
-end

src/transcoder/mod.rs

@@ -0,0 +1,2 @@
+pub mod repository;
+pub mod transcoder;

src/transcoder/repository.rs

@@ -0,0 +1,88 @@
+use std::fs;
+use std::path::Path;
+use log::{error, info};
+
+pub struct Repository {
+  pub base_dir: String,
+  pub ingest_dir: String,
+  pub archive_dir: String,
+  pub output_dir: String,
+}
+
+impl Repository {
+  pub fn new(base_path: &str) -> Repository {
+    // create the base directory path
+    create_directory(base_path);
+
+    // create the needed sub-directories
+    let ingest_path = Path::new(base_path).join("ingest");
+    create_directory(ingest_path.to_str().unwrap());
+    let archive_path = Path::new(base_path).join("archive");
+    create_directory(archive_path.to_str().unwrap());
+    let output_path = Path::new(base_path).join("output");
+    create_directory(output_path.to_str().unwrap());
+
+    return Repository {
+      base_dir: String::from(base_path),
+      ingest_dir: String::from(ingest_path.to_str().unwrap()),
+      archive_dir: String::from(archive_path.to_str().unwrap()),
+      output_dir: String::from(output_path.to_str().unwrap()),
+    };
+  }
+
+  pub fn search_ingest(&self) -> Vec<String> {
+    // read file entries from ingest
+    let files = fs::read_dir(&self.ingest_dir).unwrap();
+
+    // create vec object and loop through entries to find what we want
+    let mut ingest_files: Vec<String> = vec![];
+    for f in files {
+      let f = f.unwrap();
+      let path = f.path();
+      if path.is_file() {
+        let file_path = path.file_name().unwrap().to_str();
+        ingest_files.push(String::from(file_path.unwrap()));
+      }
+    }
+
+    return ingest_files;
+  }
+
+  pub fn archive_file(&self, file: &str) {
+    let ingest_file = Path::new(&self.ingest_dir).join(file);
+    let archive_file = Path::new(&self.archive_dir).join(file);
+
+    match fs::copy(&ingest_file, &archive_file) {
+      Ok(_) => {
+        info!("Archiving video file {}.", ingest_file.to_str().unwrap());
+      },
+      Err(e) => {
+        error!("Error archiving file {}: {}", ingest_file.to_str().unwrap(), e);
+        std::process::exit(1);
+      }
+    }
+  }
+
+  pub fn cleanup_file(&self, file: &str) {
+    let ingest_file = Path::new(&self.ingest_dir).join(file);
+    fs::remove_file(&ingest_file)
+      .expect("File deletion failed.");
+  }
+}
+
+fn create_directory(path: &str) {
+  let d = Path::new(path);
+  if d.is_dir() {
+    info!("Directory {} already exists.", path);
+  } else {
+    match fs::create_dir(path) {
+      Ok(_) => {
+        info!("Creating directory {}.", path);
+      },
+      Err(e) => {
+        error!("Error creating {}: {}", path, e);
+        std::process::exit(1);
+      }
+    }
+  }
+}

src/transcoder/transcoder.rs

@@ -0,0 +1,81 @@
+use std::path::Path;
+use std::process;
+use std::{thread, time};
+use log::{info};
+
+use crate::config::Config;
+use crate::util::io;
+use super::repository::Repository;
+
+pub struct Transcoder {
+  config: Config,
+  repository: Repository,
+}
+
+impl Transcoder {
+  pub fn new(config: Config, repository: Repository) -> Transcoder {
+    return Transcoder{
+      config: config,
+      repository: repository,
+    }
+  }
+
+  pub fn start(self) {
+    info!("Starting transcoder...");
+
+    loop {
+      // search for files in ingest
+      let ingest_files = self.repository.search_ingest();
+
+      // check if we found any files to transcode
+      if ingest_files.len() < 1 {
+        info!("There were no files found in ingest to transcode; skipping run.");
+      } else {
+        for i in ingest_files {
+          let ingest_path = Path::new(&self.repository.ingest_dir).join(&i);
+          if io::is_file_locked(&ingest_path.to_str().unwrap()) {
+            info!("{} is currently open in another program; skipping it for this run.", &i);
+            continue;
+          }
+
+          // copy the file to the archive
+          self.repository.archive_file(&i);
+
+          // perform the video transcode
+          self.transcode(&i);
+
+          // remove the source file
+          self.repository.cleanup_file(&i);
+        }
+      }
+
+      // put the loop to sleep for X minutes
+      let sleep_minutes = time::Duration::from_secs((self.config.transcoder.interval * 60).into());
+      thread::sleep(sleep_minutes);
+    }
+  }
+
+  fn transcode(&self, file: &str) {
+    let ingest_file = Path::new(&self.repository.ingest_dir).join(file);
+    let output_file = Path::new(&self.repository.output_dir).join(file);
+
+    let cmd_output = process::Command::new("/usr/bin/ffmpeg")
+      .arg("-i")        .arg(&*ingest_file.to_string_lossy())
+      .arg("-y")
+      .arg("-f")        .arg(&self.config.transcoder.video_format)
+      .arg("-c:v")      .arg(&self.config.transcoder.video_codec)
+      .arg("-s")        .arg(&self.config.transcoder.video_resolution)
+      .arg("-r")        .arg(format!("{}", self.config.transcoder.video_framerate))
+      .arg("-vf")       .arg(format!("format={}", &self.config.transcoder.video_color))
+      .arg("-profile:v").arg(&self.config.transcoder.video_profile)
+      .arg("-c:a")      .arg(&self.config.transcoder.audio_codec)
+      .arg(&*output_file.to_string_lossy())
+      .output()
+      .expect("Failed to execute command");
+
+    assert!(cmd_output.status.success());
+
+    let results_raw = &String::from_utf8_lossy(&cmd_output.stderr);
+    info!("{}", results_raw);
+  }
+}

src/util.rb

@@ -1,9 +0,0 @@
-# frozen_string_literal: true
-
-def create_directory(path)
-  if Dir.exist?(path)
-    puts "Directory #{path} already exists."
-  else
-    puts "Creating directory #{path}."
-  end
-end

src/util/io.rs

@@ -0,0 +1,61 @@
+use std::process;
+
+// checks whether a file is currently open in another program (e.g. still being written)
+pub fn is_file_locked(filepath: &str) -> bool {
+  let cmd = process::Command::new("/usr/bin/lsof")
+    .arg(filepath)
+    .output()
+    .expect("Failed to execute command");
+
+  let results = &String::from_utf8_lossy(&cmd.stdout);
+  println!("{}", results);
+  if results.contains(filepath) {
+    return true;
+  }
+
+  return false;
+}
+
+#[cfg(test)]
+mod tests {
+  use std::fs;
+  use std::mem::drop;
+  use std::path::Path;
+
+  use super::*;
+
+  #[test]
+  fn file_should_not_be_locked() {
+    setup("test-not-locked.txt");
+    assert!(!is_file_locked("test-not-locked.txt"));
+    teardown("test-not-locked.txt");
+  }
+
+  #[test]
+  fn file_should_be_locked() {
+    setup("test-locked.txt");
+    let path = Path::new("test-locked.txt");
+    match fs::File::open(&path) {
+      Err(e) => panic!("couldn't open {}: {}", "test-locked.txt", e),
+      Ok(_) => assert!(is_file_locked("test-locked.txt")),
+    };
+    teardown("test-locked.txt");
+  }
+
+  // get things ready for our tests
+  fn setup(test_file: &str) {
+    let f = match fs::File::create(test_file) {
+      Ok(file) => file,
+      Err(e) => panic!("{:?}", e),
+    };
+    drop(f);
+  }
+
+  // clean up after running tests
+  fn teardown(test_file: &str) {
+    match fs::remove_file(test_file) {
+      Ok(_) => {},
+      Err(e) => panic!("{:?}", e),
+    };
+  }
+}

src/util/mod.rs

@@ -0,0 +1 @@
+pub mod io;

src/zealot.rb

@@ -1,19 +0,0 @@
-#!/usr/bin/env ruby
-
-# frozen_string_literal: true
-
-require_relative 'config'
-require_relative 'repository'
-require_relative 'transcoder'
-
-# create new configuration instance
-c = Config.new('~/.config/zealot.toml')
-
-# create new repository instance
-r = Repository.new(c.get('transcoder.repository'))
-
-# create new transcoder instance
-t = Transcoder.new(c, r)
-
-# start the transcoder
-t.start