Split off delete-revisions-from-branch from delete-data-for-branch

To support not deleting all of the revisions.

guix-data-service/data-deletion.scm

@@ -20,55 +20,12 @@
   #:use-module (ice-9 match)
   #:use-module (squee)
   #:use-module (guix-data-service database)
+  #:use-module (guix-data-service model package-derivation-by-guix-revision-range)
   #:export (delete-data-for-branch
             delete-data-for-all-deleted-branches))
 
-(define (delete-data-for-branch conn git-repository-id branch-name)
+(define (delete-revisions-from-branch conn git-repository-id branch-name commits)
-  (define commits
+  (define (delete-jobs conn)
-    (map car
-         (exec-query conn
-                     "
-SELECT commit
-FROM git_branches
-WHERE git_repository_id = $1 AND name = $2"
-                     (list (number->string git-repository-id)
-                           branch-name))))
-
-
-  (with-postgresql-transaction
-   conn
-   (lambda (conn)
-     (exec-query
-      conn
-      (simple-format
-       #f
-       "
-DELETE FROM git_branches
-WHERE git_repository_id = ~A AND
-  name = '~A' AND
-  commit IN (~A)"
-       git-repository-id
-       branch-name
-       (string-join
-        (map (lambda (commit)
-               (string-append "'" commit "'"))
-             commits)
-        ", ")))
-
-     (for-each
-      (lambda (table)
-        (exec-query
-         conn
-         (simple-format
-          #f
-          "
-DELETE FROM ~A
-WHERE branch_name = $1 AND git_repository_id = $2"
-          table)
-         (list branch-name
-               (number->string git-repository-id))))
-      '("package_derivations_by_guix_revision_range"))
-
     (for-each
      (lambda (table)
        (exec-query
@@ -98,12 +55,36 @@ WHERE job_id IN (
 DELETE FROM load_new_guix_revision_jobs
 WHERE git_repository_id = " (number->string git-repository-id) " AND
   commit IN ("
-      (string-join
+(string-join
  (map (lambda (commit)
         (string-append "'" commit "'"))
       commits)
  ", ")
-      ")"))
+")")))
+
+  (define (delete-from-git-branches conn)
+    (exec-query
+     conn
+     (simple-format
+      #f
+      "
+DELETE FROM git_branches
+WHERE git_repository_id = ~A AND
+  name = '~A' AND
+  commit IN (~A)"
+      git-repository-id
+      branch-name
+      (string-join
+       (map (lambda (commit)
+              (string-append "'" commit "'"))
+            commits)
+       ", "))))
+
+  (with-postgresql-transaction
+   conn
+   (lambda (conn)
+     (delete-from-git-branches conn)
+     (delete-jobs conn)
 
      (let ((guix-revision-ids
             (map
@@ -130,6 +111,14 @@ WHERE guix_revisions.git_repository_id = "
 )")))))
 
        (unless (null? guix-revision-ids)
+         (for-each (lambda (guix-revision-id)
+                     (delete-guix-revision-package-derivation-entries
+                      conn
+                      git-repository-id
+                      guix-revision-id
+                      branch-name))
+                   guix-revision-ids)
+
          (for-each
           (lambda (table)
             (exec-query
@@ -164,6 +153,22 @@ WHERE id IN ("
            (string-join guix-revision-ids ", ")
            ")")))))))
 
+(define (delete-data-for-branch conn git-repository-id branch-name)
+  (define commits
+    (map car
+         (exec-query conn
+                     "
+SELECT commit
+FROM git_branches
+WHERE git_repository_id = $1 AND name = $2"
+                     (list (number->string git-repository-id)
+                           branch-name))))
+
+  (delete-revisions-from-branch conn
+                                git-repository-id
+                                branch-name
+                                commits))
+
 (define (delete-data-for-all-branches-but-master)
   (with-postgresql-connection
    "data-deletion"

guix-data-service/model/package-derivation-by-guix-revision-range.scm

@@ -20,7 +20,9 @@
   #:use-module (squee)
   #:use-module (guix-data-service database)
   #:use-module (guix-data-service utils)
-  #:export (update-package-derivations-table
+  #:export (delete-guix-revision-package-derivation-entries
+            insert-guix-revision-package-derivation-entries
+            update-package-derivations-table
             rebuild-package-derivations-table))
 
 (define (delete-guix-revision-package-derivation-entries conn