refac: move commands to separate folder

migra-cli/src/commands/apply.rs

@@ -0,0 +1,28 @@
+use crate::config::Config;
+use crate::database;
+use crate::opts::ApplyCommandOpt;
+use crate::path::PathBuilder;
+use crate::StdResult;
+
+pub(crate) fn apply_sql(config: Config, opts: ApplyCommandOpt) -> StdResult<()> {
+    let database_connection_string = &config.database_connection_string()?;
+    let mut client = database::connect(database_connection_string)?;
+
+    let file_path = PathBuilder::from(config.directory_path())
+        .append(opts.file_name)
+        .default_extension("sql")
+        .build();
+
+    let content = std::fs::read_to_string(file_path)?;
+
+    match database::apply_sql(&mut client, &content) {
+        Ok(_) => {
+            println!("File was applied successfully");
+        }
+        Err(err) => {
+            println!("{}", err);
+        }
+    }
+
+    Ok(())
+}

migra-cli/src/commands/downgrade.rs

@@ -0,0 +1,23 @@
+use crate::config::Config;
+use crate::database;
+use crate::StdResult;
+
+pub(crate) fn downgrade_applied_migrations(config: Config) -> StdResult<()> {
+    let database_connection_string = &config.database_connection_string()?;
+    let mut client = database::connect(database_connection_string)?;
+
+    let applied_migrations = database::applied_migrations(&mut client)?;
+    let migrations = config.migrations()?;
+
+    if let Some(first_applied_migration) = applied_migrations.first() {
+        if let Some(migration) = migrations
+            .iter()
+            .find(|m| m.name() == first_applied_migration)
+        {
+            println!("downgrade {}...", migration.name());
+            migration.downgrade(&mut client)?;
+        }
+    }
+
+    Ok(())
+}

migra-cli/src/commands/init.rs

@@ -0,0 +1,34 @@
+use crate::config::Config;
+use crate::config::MIGRA_TOML_FILENAME;
+use crate::StdResult;
+use std::path::PathBuf;
+
+pub(crate) fn initialize_migra_manifest(config_path: Option<PathBuf>) -> StdResult<()> {
+    let config_path = config_path
+        .map(|mut config_path| {
+            let ext = config_path.extension();
+            if config_path.is_dir() || ext.is_none() {
+                config_path.push(MIGRA_TOML_FILENAME);
+            }
+
+            config_path
+        })
+        .unwrap_or_else(|| PathBuf::from(MIGRA_TOML_FILENAME));
+
+    if config_path.exists() {
+        println!("{} already exists", config_path.to_str().unwrap());
+        return Ok(());
+    }
+
+    if let Some(dirs) = config_path.parent() {
+        std::fs::create_dir_all(dirs)?;
+    }
+
+    let config = Config::default();
+    let content = toml::to_string(&config)?;
+    std::fs::write(&config_path, content)?;
+
+    println!("Created {}", config_path.to_str().unwrap());
+
+    Ok(())
+}

migra-cli/src/commands/list.rs

@@ -0,0 +1,51 @@
+use crate::config::Config;
+use crate::database;
+use crate::error::{ErrorKind, StdResult};
+
+const EM_DASH: char = '—';
+
+pub(crate) fn print_migration_lists(config: Config) -> StdResult<()> {
+    let applied_migrations = match config.database_connection_string() {
+        Ok(ref database_connection_string) => {
+            let mut client = database::connect(database_connection_string)?;
+            let applied_migrations = database::applied_migrations(&mut client)?;
+
+            println!("Applied migrations:");
+            if applied_migrations.is_empty() {
+                println!("{}", EM_DASH);
+            } else {
+                applied_migrations
+                    .iter()
+                    .rev()
+                    .for_each(|name| println!("{}", name));
+            }
+
+            applied_migrations
+        }
+        Err(e) if *e.kind() == ErrorKind::MissedEnvVar(String::new()) => {
+            println!("{}", e.kind());
+            println!("No connection to database");
+
+            Vec::new()
+        }
+        Err(e) => panic!(e),
+    };
+
+    println!();
+
+    let pending_migrations = config
+        .migrations()?
+        .into_iter()
+        .filter(|m| !applied_migrations.contains(m.name()))
+        .collect::<Vec<_>>();
+    println!("Pending migrations:");
+    if pending_migrations.is_empty() {
+        println!("{}", EM_DASH);
+    } else {
+        pending_migrations.iter().for_each(|m| {
+            println!("{}", m.name());
+        });
+    }
+
+    Ok(())
+}

migra-cli/src/commands/make.rs

@@ -0,0 +1,45 @@
+use crate::opts::MakeCommandOpt;
+use crate::path::PathBuilder;
+use crate::Config;
+use crate::StdResult;
+use chrono::Local;
+
+pub(crate) fn make_migration(config: Config, opts: MakeCommandOpt) -> StdResult<()> {
+    let now = Local::now().format("%y%m%d%H%M%S");
+
+    let migration_name: String = opts
+        .migration_name
+        .to_lowercase()
+        .chars()
+        .map(|c| match c {
+            '0'..='9' | 'a'..='z' => c,
+            _ => '_',
+        })
+        .collect();
+
+    let migration_dir_path = PathBuilder::from(config.migration_dir_path())
+        .append(format!("{}_{}", now, migration_name))
+        .build();
+    if !migration_dir_path.exists() {
+        std::fs::create_dir_all(&migration_dir_path)?;
+    }
+
+    let upgrade_migration_path = PathBuilder::from(&migration_dir_path)
+        .append("up.sql")
+        .build();
+    if !upgrade_migration_path.exists() {
+        std::fs::write(upgrade_migration_path, "-- Your SQL goes here\n\n")?;
+    }
+
+    let downgrade_migration_path = PathBuilder::from(&migration_dir_path)
+        .append("down.sql")
+        .build();
+    if !downgrade_migration_path.exists() {
+        std::fs::write(
+            downgrade_migration_path,
+            "-- This file should undo anything in `up.sql`\n\n",
+        )?;
+    }
+
+    Ok(())
+}

migra-cli/src/commands/mod.rs

@@ -0,0 +1,13 @@
+mod apply;
+mod downgrade;
+mod init;
+mod list;
+mod make;
+mod upgrade;
+
+pub(crate) use apply::*;
+pub(crate) use downgrade::*;
+pub(crate) use init::*;
+pub(crate) use list::*;
+pub(crate) use make::*;
+pub(crate) use upgrade::*;

migra-cli/src/commands/upgrade.rs

@@ -0,0 +1,26 @@
+use crate::database;
+use crate::Config;
+use crate::StdResult;
+
+pub(crate) fn upgrade_pending_migrations(config: Config) -> StdResult<()> {
+    let database_connection_string = &config.database_connection_string()?;
+    let mut client = database::connect(database_connection_string)?;
+
+    let applied_migrations = database::applied_migrations(&mut client)?;
+
+    let migrations = config.migrations()?;
+
+    if migrations.is_empty() || migrations.last().map(|m| m.name()) == applied_migrations.first() {
+        println!("Up to date");
+    } else {
+        for m in migrations
+            .iter()
+            .filter(|m| !applied_migrations.contains(m.name()))
+        {
+            println!("upgrade {}...", m.name());
+            m.upgrade(&mut client)?;
+        }
+    }
+
+    Ok(())
+}

migra-cli/src/config.rs

@@ -5,15 +5,15 @@ use serde::{Deserialize, Serialize};
 use std::path::{Path, PathBuf};
 use std::{env, fs, io};
 
-const MIGRA_TOML_FILENAME: &str = "Migra.toml";
-const DEFAULT_DATABASE_CONNECTION_ENV: &str = "$DATABASE_URL";
+pub(crate) const MIGRA_TOML_FILENAME: &str = "Migra.toml";
+pub(crate) const DEFAULT_DATABASE_CONNECTION_ENV: &str = "$DATABASE_URL";
 
 #[derive(Debug, Serialize, Deserialize)]
 pub(crate) struct Config {
     #[serde(skip)]
-    root: PathBuf,
+    manifest_root: PathBuf,
 
-    directory: PathBuf,
+    root: PathBuf,
 
     #[serde(default)]
     database: DatabaseConfig,
@@ -27,8 +27,8 @@ pub(crate) struct DatabaseConfig {
 impl Default for Config {
     fn default() -> Config {
         Config {
-            root: PathBuf::new(),
-            directory: PathBuf::from("database"),
+            manifest_root: PathBuf::new(),
+            root: PathBuf::from("database"),
             database: DatabaseConfig {
                 connection: Some(String::from(DEFAULT_DATABASE_CONNECTION_ENV)),
             },
@@ -73,7 +73,7 @@ impl Config {
                 let content = fs::read_to_string(&config_path)?;
 
                 let mut config: Config = toml::from_str(&content).expect("Cannot parse Migra.toml");
-                config.root = config_path
+                config.manifest_root = config_path
                     .parent()
                     .unwrap_or_else(|| Path::new(""))
                     .to_path_buf();
@@ -82,40 +82,12 @@ impl Config {
             }
         }
     }
-
-    pub fn initialize(config_path: Option<PathBuf>) -> Result<(), Box<dyn std::error::Error>> {
-        let config_path = config_path
-            .map(|mut config_path| {
-                let ext = config_path.extension();
-                if config_path.is_dir() || ext.is_none() {
-                    config_path.push(MIGRA_TOML_FILENAME);
-                }
-
-                config_path
-            })
-            .unwrap_or_else(|| PathBuf::from(MIGRA_TOML_FILENAME));
-
-        if config_path.exists() {
-            println!("{} already exists", config_path.to_str().unwrap());
-            return Ok(());
-        } else if let Some(dirs) = config_path.parent() {
-            fs::create_dir_all(dirs)?;
-        }
-
-        let config = Config::default();
-        let content = toml::to_string(&config)?;
-        fs::write(&config_path, content)?;
-
-        println!("Created {}", config_path.to_str().unwrap());
-
-        Ok(())
-    }
 }
 
 impl Config {
     pub fn directory_path(&self) -> PathBuf {
-        PathBuilder::from(&self.root)
-            .append(&self.directory)
+        PathBuilder::from(&self.manifest_root)
+            .append(&self.root)
             .build()
     }
 

migra-cli/src/error.rs

@@ -3,6 +3,7 @@ use std::fmt;
 use std::mem;
 use std::result;
 
+pub type StdResult<T> = result::Result<T, Box<dyn std::error::Error>>;
 pub type Result<T> = result::Result<T, Error>;
 
 #[derive(Debug)]

migra-cli/src/main.rs

@@ -1,5 +1,6 @@
 #![deny(clippy::all)]
 
+mod commands;
 mod config;
 mod database;
 mod error;
@@ -7,169 +8,36 @@ mod migration;
 mod opts;
 mod path;
 
-use chrono::Local;
+use crate::error::StdResult;
 use config::Config;
-use error::ErrorKind;
-use opts::{AppOpt, ApplyCommandOpt, Command, MakeCommandOpt, StructOpt};
-use path::PathBuilder;
-use std::fs;
+use opts::{AppOpt, Command, StructOpt};
 
-const EM_DASH: char = '—';
-
-fn main() -> Result<(), Box<dyn std::error::Error>> {
+fn main() -> StdResult<()> {
     let opt = AppOpt::from_args();
 
     match opt.command {
         Command::Init => {
-            Config::initialize(opt.config)?;
+            commands::initialize_migra_manifest(opt.config)?;
         }
-        Command::Apply(ApplyCommandOpt { file_name }) => {
+        Command::Apply(opts) => {
             let config = Config::read(opt.config)?;
-
-            let database_connection_string = &config.database_connection_string()?;
-            let mut client = database::connect(database_connection_string)?;
-
-            let file_path = PathBuilder::from(config.directory_path())
-                .append(file_name)
-                .default_extension("sql")
-                .build();
-
-            let content = fs::read_to_string(file_path)?;
-
-            match database::apply_sql(&mut client, &content) {
-                Ok(_) => {
-                    println!("File was applied successfully")
-                }
-                Err(err) => {
-                    println!("{}", err)
-                }
-            }
+            commands::apply_sql(config, opts)?;
         }
-        Command::Make(MakeCommandOpt { migration_name }) => {
+        Command::Make(opts) => {
             let config = Config::read(opt.config)?;
-
-            let now = Local::now().format("%y%m%d%H%M%S");
-
-            let migration_name: String = migration_name
-                .to_lowercase()
-                .chars()
-                .map(|c| match c {
-                    '0'..='9' | 'a'..='z' => c,
-                    _ => '_',
-                })
-                .collect();
-
-            let migration_dir_path = PathBuilder::from(config.migration_dir_path())
-                .append(format!("{}_{}", now, migration_name))
-                .build();
-            if !migration_dir_path.exists() {
-                fs::create_dir_all(&migration_dir_path)?;
-            }
-
-            let upgrade_migration_path = PathBuilder::from(&migration_dir_path)
-                .append("up.sql")
-                .build();
-            if !upgrade_migration_path.exists() {
-                fs::write(upgrade_migration_path, "-- Your SQL goes here\n\n")?;
-            }
-
-            let downgrade_migration_path = PathBuilder::from(&migration_dir_path)
-                .append("down.sql")
-                .build();
-            if !downgrade_migration_path.exists() {
-                fs::write(
-                    downgrade_migration_path,
-                    "-- This file should undo anything in `up.sql`\n\n",
-                )?;
-            }
+            commands::make_migration(config, opts)?;
         }
         Command::List => {
             let config = Config::read(opt.config)?;
-
-            let applied_migrations = match config.database_connection_string() {
-                Ok(ref database_connection_string) => {
-                    let mut client = database::connect(database_connection_string)?;
-                    let applied_migrations = database::applied_migrations(&mut client)?;
-
-                    println!("Applied migrations:");
-                    if applied_migrations.is_empty() {
-                        println!("{}", EM_DASH);
-                    } else {
-                        applied_migrations
-                            .iter()
-                            .rev()
-                            .for_each(|name| println!("{}", name));
-                    }
-
-                    applied_migrations
-                }
-                Err(e) if *e.kind() == ErrorKind::MissedEnvVar(String::new()) => {
-                    println!("{}", e.kind());
-                    println!("No connection to database");
-
-                    Vec::new()
-                }
-                Err(e) => panic!(e),
-            };
-
-            println!();
-
-            let pending_migrations = config
-                .migrations()?
-                .into_iter()
-                .filter(|m| !applied_migrations.contains(m.name()))
-                .collect::<Vec<_>>();
-            println!("Pending migrations:");
-            if pending_migrations.is_empty() {
-                println!("{}", EM_DASH);
-            } else {
-                pending_migrations.iter().for_each(|m| {
-                    println!("{}", m.name());
-                });
-            }
+            commands::print_migration_lists(config)?;
         }
         Command::Upgrade => {
             let config = Config::read(opt.config)?;
-
-            let database_connection_string = &config.database_connection_string()?;
-            let mut client = database::connect(database_connection_string)?;
-
-            let applied_migrations = database::applied_migrations(&mut client)?;
-
-            let migrations = config.migrations()?;
-
-            if migrations.is_empty()
-                || migrations.last().map(|m| m.name()) == applied_migrations.first()
-            {
-                println!("Up to date");
-            } else {
-                for m in migrations
-                    .iter()
-                    .filter(|m| !applied_migrations.contains(m.name()))
-                {
-                    println!("upgrade {}...", m.name());
-                    m.upgrade(&mut client)?;
-                }
-            }
+            commands::upgrade_pending_migrations(config)?;
         }
         Command::Downgrade => {
             let config = Config::read(opt.config)?;
-
-            let database_connection_string = &config.database_connection_string()?;
-            let mut client = database::connect(database_connection_string)?;
-
-            let applied_migrations = database::applied_migrations(&mut client)?;
-            let migrations = config.migrations()?;
-
-            if let Some(first_applied_migration) = applied_migrations.first() {
-                if let Some(migration) = migrations
-                    .iter()
-                    .find(|m| m.name() == first_applied_migration)
-                {
-                    println!("downgrade {}...", migration.name());
-                    migration.downgrade(&mut client)?;
-                }
-            }
+            commands::downgrade_applied_migrations(config)?;
         }
     }