Define holt_winters alias within Mimir itself

Signed-off-by: Arve Knudsen <[email protected]>

go.mod

@@ -284,7 +284,7 @@ require (
 )
 
 // Using a fork of Prometheus with Mimir-specific changes.
-replace github.com/prometheus/prometheus => github.com/grafana/mimir-prometheus v0.0.0-20241121154224-81e8a18ac508
+replace github.com/prometheus/prometheus => github.com/grafana/mimir-prometheus v0.0.0-20241121154025-fd7e39a8798e
 
 // Replace memberlist with our fork which includes some fixes that haven't been
 // merged upstream yet:

go.sum

@@ -1278,8 +1278,8 @@ github.com/grafana/gomemcache v0.0.0-20241016125027-0a5bcc5aef40 h1:1TeKhyS+pvzO
 github.com/grafana/gomemcache v0.0.0-20241016125027-0a5bcc5aef40/go.mod h1:IGRj8oOoxwJbHBYl1+OhS9UjQR0dv6SQOep7HqmtyFU=
 github.com/grafana/memberlist v0.3.1-0.20220714140823-09ffed8adbbe h1:yIXAAbLswn7VNWBIvM71O2QsgfgW9fRXZNR0DXe6pDU=
 github.com/grafana/memberlist v0.3.1-0.20220714140823-09ffed8adbbe/go.mod h1:MS2lj3INKhZjWNqd3N0m3J+Jxf3DAOnAH9VT3Sh9MUE=
-github.com/grafana/mimir-prometheus v0.0.0-20241121154224-81e8a18ac508 h1:baOjet837B0Lz5ZQRTFIq1ZuhN1cZwajAEtkLR23JG4=
-github.com/grafana/mimir-prometheus v0.0.0-20241121154224-81e8a18ac508/go.mod h1:5pZyo8JoQezsp5hvVLlWhXmWLFcjUCC0fFvmswy2cBA=
+github.com/grafana/mimir-prometheus v0.0.0-20241121154025-fd7e39a8798e h1:WjcrK2YdNFRsB/7kbtZVmgNmZ7pf3TY9dWgEfHHkUHI=
+github.com/grafana/mimir-prometheus v0.0.0-20241121154025-fd7e39a8798e/go.mod h1:5pZyo8JoQezsp5hvVLlWhXmWLFcjUCC0fFvmswy2cBA=
 github.com/grafana/opentracing-contrib-go-stdlib v0.0.0-20230509071955-f410e79da956 h1:em1oddjXL8c1tL0iFdtVtPloq2hRPen2MJQKoAWpxu0=
 github.com/grafana/opentracing-contrib-go-stdlib v0.0.0-20230509071955-f410e79da956/go.mod h1:qtI1ogk+2JhVPIXVc6q+NHziSmy2W5GbdQZFUHADCBU=
 github.com/grafana/prometheus-alertmanager v0.25.1-0.20240930132144-b5e64e81e8d3 h1:6D2gGAwyQBElSrp3E+9lSr7k8gLuP3Aiy20rweLWeBw=

pkg/mimir/promql.go

@@ -0,0 +1,13 @@
+package mimir
+
+import (
+	"github.com/prometheus/prometheus/promql"
+	"github.com/prometheus/prometheus/promql/parser"
+)
+
+func init() {
+	// Keep an alias for users using holt_winters, even though dropped in Prometheus v3.
+	promql.FunctionCalls["holt_winters"] = promql.FunctionCalls["double_exponential_smoothing"]
+	parser.Functions["holt_winters"] = parser.Functions["double_exponential_smoothing"]
+	parser.Functions["holt_winters"].Experimental = false
+}