Reproduction url

N/A

Description of the issue

Running npm init @knip/config on an svn repository fails hard. It should either not fail, or fail with a clearer error message ("@knip/config only supports git repositories") and in that case be explained in the docs.

$ npm init @knip/config                                                                                                                                                                                                        [16:09]
Need to install the following packages:
@knip/[email protected]
Ok to proceed? (y)


> [email protected] npx
> create-config

fatal: not a git repository (or any of the parent directories): .git
node:internal/errors:984
  const err = new Error(message);
              ^

Error: Command failed: git rev-parse --show-toplevel
fatal: not a git repository (or any of the parent directories): .git

    at genericNodeError (node:internal/errors:984:15)
    at wrappedFn (node:internal/errors:538:14)
    at checkExecSyncError (node:child_process:890:11)
    at execSync (node:child_process:962:15)
    at getPackageManager (file:///Users/guillaumeb/.npm/_npx/017255d4efcf138c/node_modules/@knip/create-config/index.js:14:26)
    at main (file:///Users/guillaumeb/.npm/_npx/017255d4efcf138c/node_modules/@knip/create-config/index.js:28:14)
    at file:///Users/guillaumeb/.npm/_npx/017255d4efcf138c/node_modules/@knip/create-config/index.js:44:1
    at ModuleJob.run (node:internal/modules/esm/module_job:218:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:323:24)
    at async loadESM (node:internal/process/esm_loader:28:7) {
  status: 128,
  signal: null,
  output: [
    null,
    Buffer(0) [Uint8Array] [],
    Buffer(69) [Uint8Array] [
      102,  97, 116,  97, 108,  58,  32, 110, 111, 116,  32,
       97,  32, 103, 105, 116,  32, 114, 101, 112, 111, 115,
      105, 116, 111, 114, 121,  32,  40, 111, 114,  32,  97,
      110, 121,  32, 111, 102,  32, 116, 104, 101,  32, 112,
       97, 114, 101, 110, 116,  32, 100, 105, 114, 101,  99,
      116, 111, 114, 105, 101, 115,  41,  58,  32,  46, 103,
      105, 116,  10
    ]
  ],
  pid: 20595,
  stdout: Buffer(0) [Uint8Array] [],
  stderr: Buffer(69) [Uint8Array] [
    102,  97, 116,  97, 108,  58,  32, 110, 111, 116,  32,
     97,  32, 103, 105, 116,  32, 114, 101, 112, 111, 115,
    105, 116, 111, 114, 121,  32,  40, 111, 114,  32,  97,
    110, 121,  32, 111, 102,  32, 116, 104, 101,  32, 112,
     97, 114, 101, 110, 116,  32, 100, 105, 114, 101,  99,
    116, 111, 114, 105, 101, 115,  41,  58,  32,  46, 103,
    105, 116,  10
  ]
}

Node.js v21.6.1
npm error code 1
npm error path [...]
npm error command failed
npm error command sh -c create-config
npm error A complete log of this run can be found in: /Users/guillaumeb/.npm/_logs/2024-08-09T14_09_47_027Z-debug-0.log