Add deprecation warnings for functions.config() API #8808

taeold · 2025-07-03T04:18:35Z

Summary

Add deprecation warnings for functions.config() API ahead of Cloud Runtime Configuration API shutdown on Dec 31, 2025.

Changes

Add dangerouslyAllowFunctionsConfig experiment (defaults to true)
Show deprecation warning on all functions:config:* commands
Show deprecation warning during deploy when runtime config is packaged
Warning includes migration deadline and documentation link

### Description Implement deprecation warnings for the functions.config() API ahead of the Cloud Runtime Configuration API shutdown on December 31, 2025. ### Changes - Add dangerouslyAllowFunctionsConfig experiment (defaults to true) - Create centralized deprecation warning module - Add warnings to all functions:config:* CLI commands - Add warning during deploy when runtime config is packaged ### Scenarios Tested - All functions:config:* commands show deprecation warning after execution - Deploy flow shows warning when .runtimeconfig.json is generated - Warnings are non-blocking (Phase 1 - awareness only) ### Sample Commands - firebase functions:config:get - firebase functions:config:set foo.bar=baz - firebase deploy --only functions (with existing runtime config)

Update deprecation warning to include comprehensive information about: - Action required by Dec 31, 2025 - What the deprecation means for users - Impact on CLI commands and deployments - Link to migration documentation

gemini-code-assist

Summary of Changes

Hello @taeold, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces deprecation warnings for the functions.config() API within the Firebase CLI. The primary goal is to inform users about the upcoming shutdown of the underlying Cloud Runtime Configuration API by December 31, 2025, and guide them towards migration. It also provides a temporary experiment flag to allow continued use during the transition period.

Highlights

Deprecation Warning Implementation: Integrated a new deprecation warning message into all functions:config:clone, functions:config:get, functions:config:set, and functions:config:unset CLI commands.
Deployment Warning: Added a deprecation warning that triggers during the firebase deploy process if the deployed functions package includes runtime configuration data.
New Experiment Flag: Introduced dangerouslyAllowFunctionsConfig as a new experiment flag, defaulting to true, to temporarily allow the use of the deprecated functions.config() API during the migration phase.
Centralized Warning Message: Created a new utility file (src/functions/deprecationWarnings.ts) to centralize the detailed deprecation message, including the migration deadline and a link to the official documentation.

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gemini-code-assist

Code Review

This pull request adds deprecation warnings for the functions.config() API. The experiment flag dangerouslyAllowFunctionsConfig should be enforced, and multi-line strings can be improved with template literals.

gemini-code-assist · 2025-07-03T04:20:32Z

src/experiments.ts

+  dangerouslyAllowFunctionsConfig: {
+    shortDescription: "Allows the use of deprecated functions.config() API",
+    fullDescription:
+      "The functions.config() API is deprecated and will be removed on December 31, 2025. " +
+      "This experiment allows continued use of the API during the migration period.",
+    default: true,
+    public: true,
+  },


The dangerouslyAllowFunctionsConfig experiment is defined but not enforced. The functions:config:* commands and deployment logic should be gated by experiments.assertEnabled("dangerouslyAllowFunctionsConfig", "use functions.config() API") to ensure the experiment functions as intended.

gemini-code-assist · 2025-07-03T04:20:33Z

src/functions/deprecationWarnings.ts

+const FUNCTIONS_CONFIG_DEPRECATION_MESSAGE = 
+  "DEPRECATION NOTICE: Action required to deploy after Dec 31, 2025\n" +
+  "  functions.config() API is deprecated.\n" +
+  "  Cloud Runtime Configuration API, the Google Cloud service used to store function configuration data, will be shut down on December 31, 2025. As a result, you must migrate away from using functions.config() to continue deploying your functions after December 31, 2025.\n" +
+  "  What this means for you:\n" +
+  "  The Firebase CLI commands for managing this configuration (functions:config:set, get, unset, clone, and export) are deprecated. These commands no longer work after December 31, 2025.\n" +
+  "  firebase deploy command will fail for functions that use the legacy functions.config() API after December 31, 2025.\n" +
+  "  Existing deployments will continue to work with their current configuration.\n" +
+  "  See your migration options at: https://firebase.google.com/docs/functions/config-env#migrate-to-dotenv";


Consider using a template literal for this multi-line string to improve readability.

Suggested change

const FUNCTIONS_CONFIG_DEPRECATION_MESSAGE =

"DEPRECATION NOTICE: Action required to deploy after Dec 31, 2025\n" +

" functions.config() API is deprecated.\n" +

" Cloud Runtime Configuration API, the Google Cloud service used to store function configuration data, will be shut down on December 31, 2025. As a result, you must migrate away from using functions.config() to continue deploying your functions after December 31, 2025.\n" +

" What this means for you:\n" +

" The Firebase CLI commands for managing this configuration (functions:config:set, get, unset, clone, and export) are deprecated. These commands no longer work after December 31, 2025.\n" +

" firebase deploy command will fail for functions that use the legacy functions.config() API after December 31, 2025.\n" +

" Existing deployments will continue to work with their current configuration.\n" +

" See your migration options at: https://firebase.google.com/docs/functions/config-env#migrate-to-dotenv";

const FUNCTIONS_CONFIG_DEPRECATION_MESSAGE = `DEPRECATION NOTICE: Action required to deploy after Dec 31, 2025

functions.config() API is deprecated.

Cloud Runtime Configuration API, the Google Cloud service used to store function configuration data, will be shut down on December 31, 2025. As a result, you must migrate away from using functions.config() to continue deploying your functions after December 31, 2025.

What this means for you:

The Firebase CLI commands for managing this configuration (functions:config:set, get, unset, clone, and export) are deprecated. These commands no longer work after December 31, 2025.

firebase deploy command will fail for functions that use the legacy functions.config() API after December 31, 2025.

Existing deployments will continue to work with their current configuration.

See your migration options at: https://firebase.google.com/docs/functions/config-env#migrate-to-dotenv`;

codecov-commenter · 2025-07-03T04:29:13Z

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 51.92%. Comparing base (609bb02) to head (838dccd).
Report is 16 commits behind head on master.

Files with missing lines	Patch %	Lines
src/deploy/functions/prepareFunctionsUpload.ts	50.00%	1 Missing ⚠️
src/functions/deprecationWarnings.ts	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8808      +/-   ##
==========================================
- Coverage   51.97%   51.92%   -0.05%     
==========================================
  Files         407      409       +2     
  Lines       30315    30401      +86     
  Branches     6276     6287      +11     
==========================================
+ Hits        15755    15786      +31     
- Misses      13143    13199      +56     
+ Partials     1417     1416       -1

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taeold added 2 commits July 2, 2025 19:05

github-project-automation bot added this to [Cloud] Extensions + Functions Jul 3, 2025

gemini-code-assist bot reviewed Jul 3, 2025

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chore: apply code formatting

838dccd

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taeold commented Jul 3, 2025

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