fix: Fix shallow checkout when base is provided.

CHANGELOG.md

@@ -5,6 +5,8 @@
 #### 🐞 Fixes
 
 - Fixed a Git "fatal: bad object" error when submodules are in being used.
+- Fixed an issue where `moon ci` would trigger a shallow checkout error, even when a base revision
+  is provided.
 
 ## 1.30.0
 

crates/app/src/app_error.rs

@@ -8,7 +8,7 @@ use thiserror::Error;
 pub enum AppError {
     #[diagnostic(code(app::ci::no_shallow))]
     #[error(
-        "CI requires a full VCS history to operate correctly. Please avoid shallow checkouts."
+        "CI requires a full VCS history or a base revision to operate correctly. Please avoid shallow checkouts."
     )]
     CiNoShallowHistory,
 

crates/app/src/commands/ci.rs

@@ -115,14 +115,14 @@ async fn gather_touched_files(
         &vcs,
         &QueryTouchedFilesOptions {
             default_branch: true,
-            base,
+            base: base.clone(),
             head,
             ..QueryTouchedFilesOptions::default()
         },
     )
     .await?;
 
-    if result.shallow {
+    if result.shallow && base.is_none() {
         return Err(AppError::CiNoShallowHistory.into());
     }
 

crates/app/src/queries/touched_files.rs

@@ -72,9 +72,13 @@ pub async fn query_touched_files(
 
         // On a branch, so compare branch against remote base/default branch
     } else if !options.local {
-        check_shallow!(vcs);
+        let base_env = env::var("MOON_BASE");
+
+        if options.base.is_none() && base_env.is_err() {
+            check_shallow!(vcs);
+        }
 
-        let base = env::var("MOON_BASE").unwrap_or_else(|_| {
+        let base = base_env.unwrap_or_else(|_| {
             options
                 .base
                 .as_deref()