All files / src/migrations/utils rules.ts

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import { Rule, SchematicContext, Tree, callRule } from '@angular-devkit/schematics';
import { Observable, of } from 'rxjs';
import { path } from 'ramda';
import { catchError } from 'rxjs/operators';
import { tags } from '@angular-devkit/core';
import { isMigrationFailed, setMigrationFailed } from './migration';
 
export const tryRule =
  (rule: Rule, manualProcess: string): Rule =>
  (tree, context: SchematicContext) => {
    if (isMigrationFailed()) {
      // Skip rules following a migration.
      return tree;
    }
 
    const handleError = (err: any): Observable<Tree> => {
      context.logger.warn('  ⚠  Some issues were detected but could not be fixed automatically.');
      context.logger.warn(wrapErr(err));
      setMigrationFailed();
      return of(tree);
    };
 
    const wrapErr = (error: any) =>
      tags.stripIndent`
      An error occurred while automatically migrating the project. You will need to perform this stage of the migration manually.
 
      # Manual Process
 
      ${manualProcessFormatted}
 
      # Continue Migration
 
      Once this stage of the manual migration is complete, you can continue automatic migration by running
 
        ng update --migrate-only --from=${currentSchematic} @bb-cli/schematics
 
      All of the manual steps can be found in the changelog at http://wa3.backbase.com/foundation/latest/changelogs/schematics
 
      ${error}
    `;
 
    const currentSchematic = path(['schematic', 'description', 'name'], context);
    const manualProcessFormatted = tags.indentBy(6)`${manualProcess}`.trim();
 
    return callRule(rule, tree, context).pipe(catchError(handleError));
  };