# Metricdatasourcehelper

> Skill for the MetricDatasourceHelper area of metrics-drilldown. 22 symbols across 7 files.

- Skill: `grafana/metricdatasourcehelper` (Agent Skill)
- Install (CLI): `npx skillmds@latest add grafana/metricdatasourcehelper`
- Raw SKILL.md: https://api.skillmd.com/api/skills/grafana/metricdatasourcehelper/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: grafana (https://skillmd.com/u/grafana)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/grafana/metricdatasourcehelper

---


# MetricDatasourceHelper

22 symbols | 7 files | Cohesion: 78%

## When to Use

- Working with code in `src/`
- Understanding how limitAdhocProviders, getClosestScopesFacade, ScopesFacade work
- Modifying metricdatasourcehelper-related functionality

## Key Files

| File                                                                     | Symbols                                                                                       |
| ------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------- |
| `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts`      | getRuntimeDatasource, getMetadataForMetric, fetchRecentMetrics, getTagKeys, getTagValues (+9) |
| `src/shared/utils/utils.trail.ts`                                        | getQueries, limitAdhocProviders                                                               |
| `src/shared/utils/utils.scopes.ts`                                       | getClosestScopesFacade, ScopesFacade                                                          |
| `src/AppDataTrail/header/PluginInfo/PluginInfo.tsx`                      | InfoMenu                                                                                      |
| `src/AppDataTrail/DataTrail.tsx`                                         | DataTrail                                                                                     |
| `src/test/mocks/datasource.ts`                                           | MockDataSourceSrv                                                                             |
| `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.test.ts` | setup                                                                                         |

## Entry Points

Start here when exploring this area:

- **`limitAdhocProviders`** (Function) — `src/shared/utils/utils.trail.ts:78`
- **`getClosestScopesFacade`** (Function) — `src/shared/utils/utils.scopes.ts:7`
- **`ScopesFacade`** (Class) — `src/shared/utils/utils.scopes.ts:24`
- **`DataTrail`** (Class) — `src/AppDataTrail/DataTrail.tsx:96`
- **`MockDataSourceSrv`** (Class) — `src/test/mocks/datasource.ts:84`

## Key Symbols

| Symbol                    | Type     | File                                                                | Line |
| ------------------------- | -------- | ------------------------------------------------------------------- | ---- |
| `ScopesFacade`            | Class    | `src/shared/utils/utils.scopes.ts`                                  | 24   |
| `DataTrail`               | Class    | `src/AppDataTrail/DataTrail.tsx`                                    | 96   |
| `MockDataSourceSrv`       | Class    | `src/test/mocks/datasource.ts`                                      | 84   |
| `MetricDatasourceHelper`  | Class    | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 32   |
| `limitAdhocProviders`     | Function | `src/shared/utils/utils.trail.ts`                                   | 78   |
| `getClosestScopesFacade`  | Function | `src/shared/utils/utils.scopes.ts`                                  | 7    |
| `getRuntimeDatasource`    | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 44   |
| `getMetadataForMetric`    | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 82   |
| `fetchRecentMetrics`      | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 131  |
| `getTagKeys`              | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 161  |
| `getTagValues`            | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 176  |
| `getPrometheusBuildInfo`  | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 302  |
| `init`                    | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 52   |
| `reset`                   | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 57   |
| `fetchMetricsMetadata`    | Method   | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 110  |
| `getQueries`              | Function | `src/shared/utils/utils.trail.ts`                                   | 57   |
| `unwrapQuotes`            | Function | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 364  |
| `isWrappedInQuotes`       | Function | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 371  |
| `InfoMenu`                | Function | `src/AppDataTrail/header/PluginInfo/PluginInfo.tsx`                 | 38   |
| `getQueryMetricsMetadata` | Function | `src/AppDataTrail/MetricDatasourceHelper/MetricDatasourceHelper.ts` | 376  |

## Execution Flows

| Flow                                       | Type            | Steps |
| ------------------------------------------ | --------------- | ----- |
| `OnActivate → IsPrometheusDataSource`      | cross_community | 6     |
| `OnActivate → GetQueryMetricsMetadata`     | cross_community | 5     |
| `OnActivate → GetLoadMetricsMetadata`      | cross_community | 5     |
| `MetricFindQuery → IsPrometheusDataSource` | cross_community | 5     |

## Connected Areas

| Area         | Connections |
| ------------ | ----------- |
| Breakdown    | 1 calls     |
| AppDataTrail | 1 calls     |
| Labels       | 1 calls     |

## How to Explore

1. `gitnexus_context({name: "limitAdhocProviders"})` — see callers and callees
2. `gitnexus_query({query: "metricdatasourcehelper"})` — find related execution flows
3. Read key files listed above for implementation details