File replacement for prod release not working

🐞 Bug report

Command (mark with an x)

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• extract-i18n
• run
• config
• help
• version
• doc

Is this a regression?

NA

Description

Need to replace index.html with index.prod.html when build with ng build

"configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                },
                {
                  "replace": "src/index.html",
                  "with": "src/index.prod.html"
                }
              ],
              "outputHashing": "all"
            },

🔥 Exception or Error

Schema validation failed with the following errors:
  Data path "/fileReplacements/1" must have required property 'src'.
  Data path "/fileReplacements/1/replace" must match pattern "\.(([cm]?j|t)sx?|json)$".
  Data path "/fileReplacements/1" must match exactly one schema in oneOf.de>

🌍 Your Environment

Angular CLI: 13.1.4
Node: 16.15.0
Package Manager: npm 8.5.5
OS: win32 x64

Angular: 13.1.3
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.1301.4
@angular-devkit/build-angular      13.3.5
@angular-devkit/core               13.1.4
@angular-devkit/schematics         13.1.4
@angular/cdk                       13.3.6
@angular/cli                       13.1.4
@angular/material                  13.3.6
@angular/material-moment-adapter   13.3.6
@schematics/angular                13.1.4
rxjs                               7.4.0
typescript                         4.5.5

[alan-agius4]

You can use specify the output name when using the index output option.

{
    "index": {"input": "src/index.prod.html", "output": "index.html"
}

fileReplacements is intended to only replace files that are in the TypeScript program.

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