Support naming migrations sequentially

sqlx-cli/src/lib.rs

@@ -27,7 +27,8 @@ pub async fn run(opt: Opt) -> Result<()> {
                 source,
                 description,
                 reversible,
-            } => migrate::add(&source, &description, reversible).await?,
+                sequential,
+            } => migrate::add(&source, &description, reversible, sequential).await?,
             MigrateCommand::Run {
                 source,
                 dry_run,

sqlx-cli/src/migrate.rs

@@ -41,6 +41,7 @@ pub async fn add(
     migration_source: &str,
     description: &str,
     reversible: bool,
+    sequential: bool,
 ) -> anyhow::Result<()> {
     fs::create_dir_all(migration_source).context("Unable to create migrations directory")?;
 
@@ -58,7 +59,17 @@ pub async fn add(
     }
 
     let dt = Utc::now();
-    let file_prefix = dt.format("%Y%m%d%H%M%S").to_string();
+    let file_prefix = if sequential {
+        format!(
+            "{:04}",
+            migrator
+                .iter()
+                .last()
+                .map_or(1, |last_migration| last_migration.version + 1)
+        )
+    } else {
+        dt.format("%Y%m%d%H%M%S").to_string()
+    };
     if reversible {
         create_file(
             migration_source,

sqlx-cli/src/opt.rs

@@ -110,7 +110,7 @@ pub struct MigrateOpt {
 #[derive(Parser, Debug)]
 pub enum MigrateCommand {
     /// Create a new migration with the given description,
-    /// and the current time as the version.
+    /// and (by default) the current time as the version.
     Add {
         description: String,
 
@@ -121,6 +121,10 @@ pub enum MigrateCommand {
         /// else creates a single sql file
         #[clap(short)]
         reversible: bool,
+
+        /// If true, migrations are named sequentially instead of timestamp
+        #[clap(short)]
+        sequential: bool,
     },
 
     /// Run all pending migrations.