feat(cli): add --connect-timeout

sqlx-cli/Cargo.toml

@@ -47,6 +47,8 @@ openssl = { version = "0.10.38", optional = true }
 # workaround for https://github.com/rust-lang/rust/issues/29497
 remove_dir_all = "0.7.0"
 
+backoff = { version = "0.4.0", features = ["futures", "tokio"] }
+
 [features]
 default = ["postgres", "sqlite", "mysql", "native-tls"]
 rustls = ["sqlx/runtime-tokio-rustls"]

sqlx-cli/src/database.rs

@@ -1,43 +1,58 @@
 use crate::migrate;
+use crate::opt::ConnectOpts;
 use console::style;
 use promptly::{prompt, ReadlineError};
 use sqlx::any::Any;
 use sqlx::migrate::MigrateDatabase;
 
-pub async fn create(uri: &str) -> anyhow::Result<()> {
-    if !Any::database_exists(uri).await? {
-        Any::create_database(uri).await?;
+pub async fn create(connect_opts: &ConnectOpts) -> anyhow::Result<()> {
+    // NOTE: only retry the idempotent action.
+    // We're assuming that if this succeeds, then any following operations should also succeed.
+    let exists = crate::retry_connect_errors(connect_opts, Any::database_exists).await?;
+
+    if !exists {
+        Any::create_database(&connect_opts.database_url).await?;
     }
 
     Ok(())
 }
 
-pub async fn drop(uri: &str, confirm: bool) -> anyhow::Result<()> {
-    if confirm && !ask_to_continue(uri) {
+pub async fn drop(connect_opts: &ConnectOpts, confirm: bool) -> anyhow::Result<()> {
+    if confirm && !ask_to_continue(connect_opts) {
         return Ok(());
     }
 
-    if Any::database_exists(uri).await? {
-        Any::drop_database(uri).await?;
+    // NOTE: only retry the idempotent action.
+    // We're assuming that if this succeeds, then any following operations should also succeed.
+    let exists = crate::retry_connect_errors(connect_opts, Any::database_exists).await?;
+
+    if exists {
+        Any::drop_database(&connect_opts.database_url).await?;
     }
 
     Ok(())
 }
 
-pub async fn reset(migration_source: &str, uri: &str, confirm: bool) -> anyhow::Result<()> {
-    drop(uri, confirm).await?;
-    setup(migration_source, uri).await
+pub async fn reset(
+    migration_source: &str,
+    connect_opts: &ConnectOpts,
+    confirm: bool,
+) -> anyhow::Result<()> {
+    drop(connect_opts, confirm).await?;
+    setup(migration_source, connect_opts).await
 }
 
-pub async fn setup(migration_source: &str, uri: &str) -> anyhow::Result<()> {
-    create(uri).await?;
-    migrate::run(migration_source, uri, false, false).await
+pub async fn setup(migration_source: &str, connect_opts: &ConnectOpts) -> anyhow::Result<()> {
+    create(connect_opts).await?;
+    migrate::run(migration_source, connect_opts, false, false).await
 }
 
-fn ask_to_continue(uri: &str) -> bool {
+fn ask_to_continue(connect_opts: &ConnectOpts) -> bool {
     loop {
-        let r: Result<String, ReadlineError> =
-            prompt(format!("Drop database at {}? (y/n)", style(uri).cyan()));
+        let r: Result<String, ReadlineError> = prompt(format!(
+            "Drop database at {}? (y/n)",
+            style(&connect_opts.database_url).cyan()
+        ));
         match r {
             Ok(response) => {
                 if response == "n" || response == "N" {

sqlx-cli/src/lib.rs

@@ -1,6 +1,10 @@
 use anyhow::Result;
+use futures::{Future, TryFutureExt};
+use sqlx::{AnyConnection, Connection};
+use std::io;
+use std::time::Duration;
 
-use crate::opt::{Command, DatabaseCommand, MigrateCommand};
+use crate::opt::{Command, ConnectOpts, DatabaseCommand, MigrateCommand};
 
 mod database;
 // mod migration;
@@ -23,11 +27,11 @@ pub async fn run(opt: Opt) -> Result<()> {
                 source,
                 dry_run,
                 ignore_missing,
-                database_url,
+                connect_opts,
             } => {
                 migrate::run(
                     source.resolve(&migrate.source),
-                    &database_url,
+                    &connect_opts,
                     dry_run,
                     *ignore_missing,
                 )
@@ -37,56 +41,98 @@ pub async fn run(opt: Opt) -> Result<()> {
                 source,
                 dry_run,
                 ignore_missing,
-                database_url,
+                connect_opts,
             } => {
                 migrate::revert(
                     source.resolve(&migrate.source),
-                    &database_url,
+                    &connect_opts,
                     dry_run,
                     *ignore_missing,
                 )
                 .await?
             }
             MigrateCommand::Info {
                 source,
-                database_url,
-            } => migrate::info(source.resolve(&migrate.source), &database_url).await?,
+                connect_opts,
+            } => migrate::info(source.resolve(&migrate.source), &connect_opts).await?,
             MigrateCommand::BuildScript { source, force } => {
                 migrate::build_script(source.resolve(&migrate.source), force)?
             }
         },
 
         Command::Database(database) => match database.command {
-            DatabaseCommand::Create { database_url } => database::create(&database_url).await?,
+            DatabaseCommand::Create { connect_opts } => database::create(&connect_opts).await?,
             DatabaseCommand::Drop {
                 confirmation,
-                database_url,
-            } => database::drop(&database_url, !confirmation).await?,
+                connect_opts,
+            } => database::drop(&connect_opts, !confirmation.yes).await?,
             DatabaseCommand::Reset {
                 confirmation,
                 source,
-                database_url,
-            } => database::reset(&source, &database_url, !confirmation).await?,
+                connect_opts,
+            } => database::reset(&source, &connect_opts, !confirmation.yes).await?,
             DatabaseCommand::Setup {
                 source,
-                database_url,
-            } => database::setup(&source, &database_url).await?,
+                connect_opts,
+            } => database::setup(&source, &connect_opts).await?,
         },
 
         Command::Prepare {
             check: false,
             merged,
             args,
-            database_url,
-        } => prepare::run(&database_url, merged, args)?,
+            connect_opts,
+        } => prepare::run(&connect_opts, merged, args).await?,
 
         Command::Prepare {
             check: true,
             merged,
             args,
-            database_url,
-        } => prepare::check(&database_url, merged, args)?,
+            connect_opts,
+        } => prepare::check(&connect_opts, merged, args).await?,
     };
 
     Ok(())
 }
+
+/// Attempt to connect to the database server, retrying up to `ops.connect_timeout`.
+async fn connect(opts: &ConnectOpts) -> sqlx::Result<AnyConnection> {
+    retry_connect_errors(opts, AnyConnection::connect).await
+}
+
+/// Attempt an operation that may return errors like `ConnectionRefused`,
+/// retrying up until `ops.connect_timeout`.
+///
+/// The closure is passed `&ops.database_url` for easy composition.
+async fn retry_connect_errors<'a, F, Fut, T>(
+    opts: &'a ConnectOpts,
+    mut connect: F,
+) -> sqlx::Result<T>
+where
+    F: FnMut(&'a str) -> Fut,
+    Fut: Future<Output = sqlx::Result<T>> + 'a,
+{
+    backoff::future::retry(
+        backoff::ExponentialBackoffBuilder::new()
+            .with_max_elapsed_time(Some(Duration::from_secs(opts.connect_timeout)))
+            .build(),
+        || {
+            connect(&opts.database_url).map_err(|e| -> backoff::Error<sqlx::Error> {
+                match e {
+                    sqlx::Error::Io(ref ioe) => match ioe.kind() {
+                        io::ErrorKind::ConnectionRefused
+                        | io::ErrorKind::ConnectionReset
+                        | io::ErrorKind::ConnectionAborted => {
+                            return backoff::Error::transient(e);
+                        }
+                        _ => (),
+                    },
+                    _ => (),
+                }
+
+                backoff::Error::permanent(e)
+            })
+        },
+    )
+    .await
+}

sqlx-cli/src/migrate.rs

@@ -1,8 +1,8 @@
+use crate::opt::ConnectOpts;
 use anyhow::{bail, Context};
 use chrono::Utc;
 use console::style;
 use sqlx::migrate::{AppliedMigration, Migrate, MigrateError, MigrationType, Migrator};
-use sqlx::{AnyConnection, Connection};
 use std::borrow::Cow;
 use std::collections::{HashMap, HashSet};
 use std::fmt::Write;
@@ -116,9 +116,9 @@ fn short_checksum(checksum: &[u8]) -> String {
     s
 }
 
-pub async fn info(migration_source: &str, uri: &str) -> anyhow::Result<()> {
+pub async fn info(migration_source: &str, connect_opts: &ConnectOpts) -> anyhow::Result<()> {
     let migrator = Migrator::new(Path::new(migration_source)).await?;
-    let mut conn = AnyConnection::connect(uri).await?;
+    let mut conn = crate::connect(&connect_opts).await?;
 
     conn.ensure_migrations_table().await?;
 
@@ -190,12 +190,12 @@ fn validate_applied_migrations(
 
 pub async fn run(
     migration_source: &str,
-    uri: &str,
+    connect_opts: &ConnectOpts,
     dry_run: bool,
     ignore_missing: bool,
 ) -> anyhow::Result<()> {
     let migrator = Migrator::new(Path::new(migration_source)).await?;
-    let mut conn = AnyConnection::connect(uri).await?;
+    let mut conn = crate::connect(connect_opts).await?;
 
     conn.ensure_migrations_table().await?;
 
@@ -249,12 +249,12 @@ pub async fn run(
 
 pub async fn revert(
     migration_source: &str,
-    uri: &str,
+    connect_opts: &ConnectOpts,
     dry_run: bool,
     ignore_missing: bool,
 ) -> anyhow::Result<()> {
     let migrator = Migrator::new(Path::new(migration_source)).await?;
-    let mut conn = AnyConnection::connect(uri).await?;
+    let mut conn = crate::connect(&connect_opts).await?;
 
     conn.ensure_migrations_table().await?;