rebase: add partial abort check box

Summary:
D58370354 added `sl rebase --quit` to quit the rebase state and keep the already rebased commits.
The feature received many positive feedback. And adding it to ISL will enhance its discoverability.

> This is so awesome - as someone who carries around massive stacks holding old/wip changes,
> I hit mid stack conflicts a lot, and aborting to avoid working through conflicts is always a pain.
> Also as someone who uses ISL, +1 on your comment in the shared post in Sapling Developers
> on adding this there too

This diff expose it to ISL by adding a partial abort check box for rebase operations and pass the
`isPartialAbort` value to `AbortMergeOperation`, so it can return the right commands for partially
aborting rebase operations.

Reviewed By: evangrayk

Differential Revision: D62334053

fbshipit-source-id: 58682a623bf9419e3c8b4a101b2e7e03af5cd475

addons/isl/src/UncommittedChanges.tsx

@@ -48,6 +48,8 @@ import {localStorageBackedAtom, readAtom, useAtomGet, writeAtom} from './jotaiUt
 import {
   AutoResolveSettingCheckbox,
   shouldAutoResolveAllBeforeContinue,
+  shouldPartialAbort,
+  PartialAbortSettingCheckbox,
 } from './mergeConflicts/state';
 import {AbortMergeOperation} from './operations/AbortMergeOperation';
 import {AddRemoveOperation} from './operations/AddRemoveOperation';
@@ -911,7 +913,9 @@ function MergeConflictButtons({
         key="abort"
         disabled={shouldDisableButtons}
         onClick={() => {
-          runOperation(new AbortMergeOperation(conflicts));
+          const partialAbortAvailable = conflicts?.command === 'rebase';
+          const isPartialAbort = partialAbortAvailable && readAtom(shouldPartialAbort);
+          runOperation(new AbortMergeOperation(conflicts, isPartialAbort));
         }}>
         <Icon slot="start" icon={isRunningAbort ? 'loading' : 'circle-slash'} />
         <T>Abort</T>
@@ -980,6 +984,7 @@ function MergeConflictButtons({
       {Internal.showInlineAutoRunMergeDriversOption === true && (
         <AutoResolveSettingCheckbox subtle />
       )}
+      {conflicts?.command === 'rebase' && <PartialAbortSettingCheckbox subtle />}
     </Row>
   );
 }

addons/isl/src/mergeConflicts/state.tsx

@@ -38,6 +38,21 @@ export function AutoResolveSettingCheckbox({subtle}: {subtle?: boolean}) {
   );
 }
 
+export const shouldPartialAbort = localStorageBackedAtom<boolean>('isl.partial-abort', false);
+
+export function PartialAbortSettingCheckbox({subtle}: {subtle?: boolean}) {
+  const [isPartialAbort, setShouldPartialAbort] = useAtom(shouldPartialAbort);
+
+  const label = <T>Keep Rebased Commits on Abort</T>;
+  return (
+    <Tooltip title={t('Keep already rebased commits when aborting a rebase operation.')}>
+      <Checkbox checked={isPartialAbort} onChange={setShouldPartialAbort}>
+        {subtle ? <Subtle>{label}</Subtle> : label}
+      </Checkbox>
+    </Tooltip>
+  );
+}
+
 export const CONFLICT_SIDE_LABELS = {
   /* Label used for the local / destination side of a conflict */
   local: t('dest - rebasing onto'),

addons/isl/src/operations/AbortMergeOperation.ts

@@ -10,7 +10,7 @@ import type {MergeConflicts} from '../types';
 import {Operation} from './Operation';
 
 export class AbortMergeOperation extends Operation {
-  constructor(private conflicts: MergeConflicts) {
+  constructor(private conflicts: MergeConflicts, private isPartialAbort: boolean) {
     super('AbortMergeOperation');
   }
 
@@ -19,6 +19,10 @@ export class AbortMergeOperation extends Operation {
   // `sl abort` isn't a real command like `sl continue` is.
   // however, the merge conflict data we've fetched includes the command to abort
   getArgs() {
+    if (this.isPartialAbort) {
+      // only rebase supports partial aborts
+      return ['rebase', '--quit'];
+    }
     if (this.conflicts.toAbort == null) {
       // if conflicts are still loading we don't know the right command...
       // just try `rebase --abort`...

addons/isl/src/types.ts

@@ -791,7 +791,8 @@ export type LocalStorageName =
   | 'isl.hide-non-blocking-diagnostics'
   | 'isl.rebase-off-warm-warning-enabled'
   // These keys are prefixes, with further dynamic keys appended afterwards
-  | 'isl.edited-commit-messages:';
+  | 'isl.edited-commit-messages:'
+  | 'isl.partial-abort';
 
 export type ClientToServerMessage =
   | {type: 'heartbeat'; id: string}