fix: call resolveRev when getting file info

src/libs/code_intelligence/utils/file_info.ts

@@ -0,0 +1,17 @@
+import { Observable, zip } from 'rxjs'
+import { map, switchMap } from 'rxjs/operators'
+import { FileInfo } from '..'
+import { resolveRev, retryWhenCloneInProgressError } from '../../../shared/repo/backend'
+
+export const ensureRevisionsAreCloned = (files: Observable<FileInfo>): Observable<FileInfo> =>
+    files.pipe(
+        switchMap(({ repoPath, rev, baseRev, ...rest }) => {
+            // Although we get the commit SHA's from elesewhere, we still need to
+            // use `resolveRev` otherwise we can't guarantee Sourcegraph has the
+            // revision cloned.
+            const resolvingHeadRev = resolveRev({ repoPath, rev }).pipe(retryWhenCloneInProgressError())
+            const resolvingBaseRev = resolveRev({ repoPath, rev: baseRev }).pipe(retryWhenCloneInProgressError())
+
+            return zip(resolvingHeadRev, resolvingBaseRev).pipe(map(() => ({ repoPath, rev, baseRev, ...rest })))
+        })
+    )

src/libs/github/file_info.ts

@@ -4,6 +4,7 @@ import { filter, map, switchMap } from 'rxjs/operators'
 import { GitHubBlobUrl } from '.'
 import { resolveRev, retryWhenCloneInProgressError } from '../../shared/repo/backend'
 import { FileInfo } from '../code_intelligence'
+import { ensureRevisionsAreCloned } from '../code_intelligence/utils/file_info'
 import { getCommitIDFromPermalink } from './scrape'
 import { getDeltaFileName, getDiffResolvedRev, getGitHubState, parseURL } from './util'
 
@@ -85,7 +86,7 @@ export const resolveFileInfo = (): Observable<FileInfo> => {
             filePath,
             commitID,
             rev: rev || commitID,
-        })
+        }).pipe(ensureRevisionsAreCloned)
     } catch (error) {
         return throwError(error)
     }

src/libs/gitlab/file_info.ts

@@ -37,7 +37,7 @@ export const resolveFileInfo = (): Observable<FileInfo> => {
             filePath,
             commitID,
             rev,
-        })
+        }).pipe(ensureRevisionsAreCloned)
     } catch (error) {
         return throwError(error)
     }