0be354a920
Single-commit clean baseline after security scrub of niche-tells, project codenames, internal jargon, and contributor-email leaks. Contents: - 100 Rust crates (_primitives/_rust/) - 37 agent manifests (_manifests/) + generated specs (_generated/) - 67 user-invocable skills (skills/) - 33 hooks (hooks/) - Composition blocks (_blocks/) - Documentation (docs/, README.md) - TS adapter packages (_ts_packages/) - Assembler (_assembler/) - Roles (_roles/) - Templates (_templates/) - Forgejo CI (.forgejo/) Author: Denis Parfionovich <info@greendragon.info> License: see LICENSE.
58 lines
2 KiB
Rust
58 lines
2 KiB
Rust
//! `kei-migrate down [n]` — revert the last N applied migrations.
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//!
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//! Requires a sibling `<version>_<name>.down.sql` for each target. Missing
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//! down-file = hard error — we don't guess reversals.
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use crate::discover::Migration;
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use crate::tracker;
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use anyhow::{bail, Context, Result};
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use sqlx::AnyPool;
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use std::collections::HashMap;
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/// Revert the last `n` applied migrations in reverse order.
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pub async fn run(pool: &AnyPool, migrations: &[Migration], n: u32) -> Result<u32> {
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let mut applied: Vec<i64> = tracker::applied_versions(pool).await?;
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applied.sort_unstable();
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applied.reverse(); // newest first
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let by_version: HashMap<i64, &Migration> =
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migrations.iter().map(|m| (m.version, m)).collect();
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let mut reverted = 0u32;
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for v in applied.into_iter().take(n as usize) {
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let m = by_version.get(&v).with_context(|| {
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format!("applied version {} has no matching file on disk", v)
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})?;
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revert_one(pool, m).await?;
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reverted += 1;
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println!("[down] {} {} — reverted", m.version, m.name);
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}
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Ok(reverted)
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}
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async fn revert_one(pool: &AnyPool, m: &Migration) -> Result<()> {
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let down_path = m.down_path.as_ref().ok_or_else(|| {
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anyhow::anyhow!(
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"no down-sql for migration {} ({}) — create {}_{}.down.sql",
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m.version,
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m.name,
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m.version,
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m.name
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)
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})?;
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let sql = std::fs::read_to_string(down_path)
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.with_context(|| format!("read {}", down_path.display()))?;
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if sql.contains("-- IRREVERSIBLE") {
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bail!(
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"migration {} ({}) is marked IRREVERSIBLE — refusing to run down-sql",
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m.version,
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m.name
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);
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}
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let mut tx = pool.begin().await?;
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sqlx::raw_sql(&sql)
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.execute(&mut *tx)
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.await
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.with_context(|| format!("revert migration {} ({})", m.version, m.name))?;
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tx.commit().await?;
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tracker::record_down(pool, m.version).await?;
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Ok(())
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}
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