Check that the repositories given to "opam repository remove" actually exist

master_changes.md

@@ -63,6 +63,7 @@ users)
 
 ## Repository
   * Accurately tag `curl` download command when loaded from global config file [#6270 @rjbou]
+  * Check that the repositories given to `opam repository remove` actually exist [#5014 @kit-ty-kate - fixes #5012]
 
 ## Lock
 

src/client/opamCommands.ml

@@ -2345,13 +2345,18 @@ let repository cli =
       OpamStd.List.insert_at rank new_repo
         (List.filter (( <> ) new_repo ) repos)
     in
-    let check_for_repos rt names err =
+    let check_for_repos' rt names err =
       match
         List.filter (fun n ->
             not (OpamRepositoryName.Map.mem n rt.repositories))
           names
-      with [] -> () | l ->
-        err (OpamStd.List.concat_map " " OpamRepositoryName.to_string l)
+      with [] -> true | l ->
+        err (OpamStd.List.concat_map " " OpamRepositoryName.to_string l);
+        List.compare_lengths l names <> 0
+    in
+    let check_for_repos rt names err =
+      let _has_known_repos : bool = check_for_repos' rt names err in
+      ()
     in
     OpamGlobalState.with_ `Lock_none @@ fun gt ->
     let all_switches = OpamFile.Config.installed_switches gt.config in
@@ -2421,7 +2426,10 @@ let repository cli =
       `Ok ()
     | Some `remove, names ->
       let names = List.map OpamRepositoryName.of_string names in
-      let rm = List.filter (fun n -> not (List.mem n names)) in
+      let rm =
+        List.filter (fun n ->
+            not (List.exists (OpamRepositoryName.equal n) names))
+      in
       let full_wipe = List.mem `All scope in
       let global = global || full_wipe in
       let gt =
@@ -2435,11 +2443,27 @@ let repository cli =
              "No configured repositories by these names found: %s");
         OpamRepositoryState.drop @@
         List.fold_left OpamRepositoryCommand.remove rt names
-      else if scope = [`Current_switch] then
-        OpamConsole.msg
-          "Repositories removed from the selections of switch %s. \
-           Use '--all' to forget about them altogether.\n"
-          (OpamSwitch.to_string (OpamStateConfig.get_switch ()));
+      else begin
+        let has_known_repos =
+          List.fold_left (fun has_known_repos switch ->
+              let rt =
+                OpamSwitchState.with_ `Lock_none ~switch gt @@ fun st ->
+                st.OpamStateTypes.switch_repos
+              in
+              check_for_repos' rt names
+                (OpamConsole.warning
+                   "No configured repositories by these names found in \
+                    the selection of switch '%s': %s"
+                   (OpamSwitch.to_string switch))
+              || has_known_repos)
+            false switches
+        in
+        if scope = [`Current_switch] && has_known_repos then
+          OpamConsole.msg
+            "Repositories removed from the selections of switch %s. \
+             Use '--all' to forget about them altogether.\n"
+            (OpamSwitch.to_string (OpamStateConfig.get_switch ()));
+      end;
       `Ok ()
     | Some `add, [name] ->
       let name = OpamRepositoryName.of_string name in

tests/reftests/repository.test

@@ -817,6 +817,7 @@ GARBAGE
 [ERROR] No package matching two-three found
 # Return code 5 #
 ### : Repo config with no url repo
+### cp OPAM/repo/repos-config repos-config.bak
 ### opam switch create nourl --empty
 ### opam repo remove --all repo versions
 ### <nourl/repo>
@@ -868,3 +869,43 @@ opam-version: "2.0"
 
 # Packages matching: any
 # No matches found
+### mv repos-config.bak OPAM/repo/repos-config
+### : Check the behaviour of opam repository remove when given unknown repositories
+### <REM/repo>
+opam-version: "2.0"
+### mkdir REM/packages
+### opam switch create rm-unknown --empty
+### opam repository add oper ./REM --this-switch
+[oper] Initialised
+### opam repository add oper3 ./REM --this-switch
+[oper3] Initialised
+### opam repository add repo2 ./REM --dont-select
+[repo2] Initialised
+### opam repository add to-many-commits ./REM --this-switch
+[to-many-commits] Initialised
+### opam repository remove repo versions --all
+### opam repository --all --short
+oper
+oper3
+repo2
+to-many-commits
+### opam repository --short
+to-many-commits
+oper3
+oper
+### opam repository remove does-not-exist
+[WARNING] No configured repositories by these names found in the selection of switch 'rm-unknown': does-not-exist
+### opam repository remove does-not-exist --all
+[WARNING] No configured repositories by these names found: does-not-exist
+### opam repository remove does-not-exist oper
+[WARNING] No configured repositories by these names found in the selection of switch 'rm-unknown': does-not-exist
+Repositories removed from the selections of switch rm-unknown. Use '--all' to forget about them altogether.
+### opam repository remove does-not-exist repo2 --all
+[WARNING] No configured repositories by these names found: does-not-exist
+### opam repository --all --short
+oper
+oper3
+to-many-commits
+### opam repository --short
+to-many-commits
+oper3