Only initialized variables and constants can be referenced in decorators

[lsrsilva]

I'm updating a project to angular 9 and when I run the command to extract I'm getting the error:

I'm not understanding why I'm getting this, because the app build occurs normally, and only with the extraction that the error occurs.

I'm using the version 1.4.0 of the library.

So, anyone else has faced the same error?

Adm project config on angular.json

"adm": {
      "i18n": {
        "sourceLocale": {
          "code": "pt",
          "baseHref": "/pt/"
        },
        "locales": {
          "es": {
            "translation": "projects/adm/i18n/messages.es.xlf",
            "baseHref": "/es/"
          },
          "en": {
            "translation": "projects/adm/i18n/messages.en.xlf",
            "baseHref": "/en/"
          }
        }
      },
      "projectType": "application",
      "schematics": {
        "@schematics/angular:component": {
          "style": "scss",
          "prefix": "adm"
        }
      },
      "root": "projects/adm",
      "sourceRoot": "projects/adm/src",
      "prefix": "app",
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist/adm/pt",
            "index": "projects/adm/src/index.html",
            "main": "projects/adm/src/main.ts",
            "polyfills": "projects/adm/src/polyfills.ts",
            "tsConfig": "projects/adm/tsconfig.app.json",
            "aot": true,
            "localize": true,
            "assets": [
              "projects/adm/src/favicon.ico",
              "projects/adm/src/assets",
              {
                "glob": "**",
                "input": "dist/ui-kit/assets",
                "output": "pacto-ui"
              }
            ],
            "styles": [
              "node_modules/ng-snotify/styles/material.scss",
              "projects/adm/src/styles.scss",
              "dist/ui-kit/assets/ui-kit.scss",
              "dist/ui-kit/assets/scss/material-theme.scss",
              "node_modules/bootstrap/dist/css/bootstrap.min.css"
            ],
            "scripts": [
              "node_modules/jquery/dist/jquery.min.js",
              "node_modules/moment/min/moment.min.js",
              "node_modules/apexcharts/dist/apexcharts.min.js"
            ]
          },
          "configurations": {
            "es": {
              "localize": [
                "es"
              ],
              "outputPath": "dist/adm"
            },
            "en": {
              "localize": [
                "en"
              ],
              "outputPath": "dist/adm"
            },
            "production": {
              "optimization": true,
              "outputHashing": "all",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "budgets": [
                {
                  "type": "initial",
                  "maximumWarning": "12mb",
                  "maximumError": "15mb"
                },
                {
                  "type": "anyComponentStyle",
                  "maximumWarning": "12kb",
                  "maximumError": "15kb"
                }
              ]
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "vendorSourceMap": true,
            "browserTarget": "adm:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "adm:build:production"
            },
            "es": {
              "browserTarget": "adm:build:es"
            },
            "en": {
              "browserTarget": "adm:build:en"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "adm:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "projects/adm/src/test.ts",
            "polyfills": "projects/adm/src/polyfills.ts",
            "tsConfig": "projects/adm/tsconfig.spec.json",
            "karmaConfig": "projects/adm/karma.conf.js",
            "assets": [
              "projects/adm/src/favicon.ico",
              "projects/adm/src/assets"
            ],
            "styles": [
              "projects/adm/src/styles.scss"
            ],
            "scripts": []
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "projects/adm/tsconfig.app.json",
              "projects/adm/tsconfig.spec.json",
              "projects/adm/e2e/tsconfig.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        },
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "projects/adm/e2e/protractor.conf.js",
            "devServerTarget": "adm:serve"
          },
          "configurations": {
            "production": {
              "devServerTarget": "adm:serve:production"
            }
          }
        },
        "extract-i18n-merge": {
          "builder": "ng-extract-i18n-merge:ng-extract-i18n-merge",
          "options": {
            "format": "xlf",
            "outputPath": "projects/adm/i18n",
            "targetFiles": [
              "messages.es.xlf",
              "messages.en.xlf"
            ]
          }
        }
      }
    },

[daniel-sc]

@lsrsilva Only Angular 13+ is supported - see https://github.com/daniel-sc/ng-extract-i18n-merge/issues/39#issuecomment-1165823825

[lsrsilva]

oh I see! thanks for answering. I'm proceed with the updates so.