Add checksum mismtaches to sqlx-cli migrate info (launchbadge#1680)

This fixes launchbadge#870

Author: lfn3

sqlx-cli/src/migrate.rs

@@ -3,9 +3,10 @@ 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;
 use std::fs::{self, File};
-use std::io::Write;
 use std::path::Path;
 use std::time::Duration;
 
@@ -30,7 +31,7 @@ fn create_file(
 
  let mut file = File::create(&path).context("Failed to create migration file")?;
 
- file.write_all(migration_type.file_content().as_bytes())?;
+ std::io::Write::write_all(&mut file, migration_type.file_content().as_bytes())?;
 
  Ok(())
 }
@@ -107,6 +108,14 @@ See: https://docs.rs/sqlx/0.5/sqlx/macro.migrate.html
  Ok(())
 }
 
+fn short_checksum(checksum: &[u8]) -> String {
+ let mut s = String::with_capacity(checksum.len() * 2);
+ for b in checksum {
+ write!(&mut s, "{:02x?}", b).expect("should not fail to write to str");
+ }
+ s
+}
+
 pub async fn info(migration_source: &str, uri: &str) -> anyhow::Result<()> {
  let migrator = Migrator::new(Path::new(migration_source)).await?;
  let mut conn = AnyConnection::connect(uri).await?;
@@ -121,16 +130,39 @@ pub async fn info(migration_source: &str, uri: &str) -> anyhow::Result<()> {
  .collect();
 
  for migration in migrator.iter() {
+ let applied = applied_migrations.get(&migration.version);
+
+ let (status_msg, mismatched_checksum) = if let Some(applied) = applied {
+ if applied.checksum != migration.checksum {
+ (style("installed (different checksum)").red(), true)
+ } else {
+ (style("installed").green(), false)
+ }
+ } else {
+ (style("pending").yellow(), false)
+ };
+
  println!(
  "{}/{} {}",
  style(migration.version).cyan(),
- if applied_migrations.contains_key(&migration.version) {
- style("installed").green()
- } else {
- style("pending").yellow()
- },
- migration.description,
+ status_msg,
+ migration.description
  );
+
+ if mismatched_checksum {
+ println!(
+ "applied migration had checksum {}",
+ short_checksum(
+ &applied
+ .map(|a| a.checksum.clone())
+ .unwrap_or_else(|| Cow::Owned(vec![]))
+ ),
+ );
+ println!(
+ "local migration has checksum {}",
+ short_checksum(&migration.checksum)
+ )
+ }
  }
 
  Ok(())