Templating: Add new global built-in variables (#21790)

* Add new global built-in variables #20523
new branch from master

* #20523 Revert change on __from and __to like requested

* #20523 simplify contextSrv access

* #20523 simplify contextSrv access

* #20523 repair jest tests

docs/sources/reference/templating.md

@@ -347,6 +347,18 @@ This variable is only available in the Singlestat panel and can be used in the p
 
 Currently only supported for Prometheus data sources. This variable represents the range for the current dashboard. It is calculated by `to - from`. It has a millisecond and a second representation called `$__range_ms` and `$__range_s`.
 
+### The $__dashboard Variable
+> Only available in Grafana v6.6+
+
+This variable is the UID of the current dashboard.
+`${__dashboard.name}` is the name of the current dashboard.
+
+### The $__org Variable
+> Only available in Grafana v6.6+
+
+This variable is the ID of the current organization.
+`${__org.name}` is the name of the current organization.
+
 ## Repeating Panels
 
 Template variables can be very useful to dynamically change your queries across a whole dashboard. If you want

public/app/features/templating/specs/variable_srv.test.ts

@@ -6,6 +6,12 @@ import $q from 'q';
 import { dateTime } from '@grafana/data';
 import { CustomVariable } from '../custom_variable';
 
+jest.mock('app/core/core', () => ({
+  contextSrv: {
+    user: { orgId: 1, orgName: 'TestOrg' },
+  },
+}));
+
 describe('VariableSrv', function(this: any) {
   const ctx = {
     datasourceSrv: {},
@@ -26,6 +32,7 @@ describe('VariableSrv', function(this: any) {
         this.variables = vars;
       },
       updateIndex: () => {},
+      setGlobalVariable: (name: string, variable: any) => {},
       replace: (str: any) =>
         str.replace(this.regex, (match: string) => {
           return match;

public/app/features/templating/specs/variable_srv_init.test.ts

@@ -6,6 +6,12 @@ import { DashboardModel } from '../../dashboard/state/DashboardModel';
 // @ts-ignore
 import $q from 'q';
 
+jest.mock('app/core/core', () => ({
+  contextSrv: {
+    user: { orgId: 1, orgName: 'TestOrg' },
+  },
+}));
+
 describe('VariableSrv init', function(this: any) {
   const templateSrv = {
     init: (vars: any) => {
@@ -13,6 +19,7 @@ describe('VariableSrv init', function(this: any) {
     },
     variableInitialized: () => {},
     updateIndex: () => {},
+    setGlobalVariable: (name: string, variable: any) => {},
     replace: (str: string) =>
       str.replace(this.regex, match => {
         return match;

public/app/features/templating/variable_srv.ts

@@ -14,7 +14,7 @@ import { DashboardModel } from 'app/features/dashboard/state/DashboardModel';
 import { TimeRange, AppEvents } from '@grafana/data';
 import { CoreEvents } from 'app/types';
 import { UrlQueryMap } from '@grafana/runtime';
-import { appEvents } from 'app/core/core';
+import { appEvents, contextSrv } from 'app/core/core';
 
 export class VariableSrv {
   dashboard: DashboardModel;
@@ -55,6 +55,24 @@ export class VariableSrv {
       )
       .then(() => {
         this.templateSrv.updateIndex();
+        this.templateSrv.setGlobalVariable('__dashboard', {
+          value: {
+            name: dashboard.title,
+            uid: dashboard.uid,
+            toString: function() {
+              return this.uid;
+            },
+          },
+        });
+        this.templateSrv.setGlobalVariable('__org', {
+          value: {
+            name: contextSrv.user.orgName,
+            id: contextSrv.user.id,
+            toString: function() {
+              return this.id;
+            },
+          },
+        });
       });
   }