*: remove use of golang.org/x/net/context

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

dispatch/dispatch.go

@@ -14,6 +14,7 @@
 package dispatch
 
 import (
+	"context"
 	"fmt"
 	"sort"
 	"sync"
@@ -22,7 +23,6 @@ import (
 	"github.com/go-kit/kit/log"
 	"github.com/go-kit/kit/log/level"
 	"github.com/prometheus/common/model"
-	"golang.org/x/net/context"
 
 	"github.com/prometheus/alertmanager/notify"
 	"github.com/prometheus/alertmanager/provider"

dispatch/dispatch_test.go

@@ -14,6 +14,7 @@
 package dispatch
 
 import (
+	"context"
 	"reflect"
 	"sort"
 	"sync"
@@ -22,7 +23,6 @@ import (
 
 	"github.com/go-kit/kit/log"
 	"github.com/prometheus/common/model"
-	"golang.org/x/net/context"
 
 	"github.com/prometheus/alertmanager/notify"
 	"github.com/prometheus/alertmanager/types"

notify/impl.go

@@ -15,11 +15,13 @@ package notify
 
 import (
 	"bytes"
+	"context"
 	"crypto/sha256"
 	"crypto/tls"
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"mime"
 	"mime/multipart"
@@ -37,8 +39,6 @@ import (
 	commoncfg "github.com/prometheus/common/config"
 	"github.com/prometheus/common/model"
 	"github.com/prometheus/common/version"
-	"golang.org/x/net/context"
-	"golang.org/x/net/context/ctxhttp"
 
 	"github.com/prometheus/alertmanager/config"
 	"github.com/prometheus/alertmanager/template"
@@ -177,7 +177,7 @@ func (w *Webhook) Notify(ctx context.Context, alerts ...*types.Alert) (bool, err
 		return false, err
 	}
 
-	resp, err := ctxhttp.Do(ctx, c, req)
+	resp, err := c.Do(req.WithContext(ctx))
 	if err != nil {
 		return true, err
 	}
@@ -530,7 +530,7 @@ func (n *PagerDuty) notifyV1(
 		return false, err
 	}
 
-	resp, err := ctxhttp.Post(ctx, c, n.conf.URL.String(), contentTypeJSON, &buf)
+	resp, err := post(ctx, c, n.conf.URL.String(), contentTypeJSON, &buf)
 	if err != nil {
 		return true, err
 	}
@@ -593,7 +593,7 @@ func (n *PagerDuty) notifyV2(
 		return false, err
 	}
 
-	resp, err := ctxhttp.Post(ctx, c, n.conf.URL.String(), contentTypeJSON, &buf)
+	resp, err := post(ctx, c, n.conf.URL.String(), contentTypeJSON, &buf)
 	if err != nil {
 		return true, err
 	}
@@ -815,7 +815,7 @@ func (n *Slack) Notify(ctx context.Context, as ...*types.Alert) (bool, error) {
 		return false, err
 	}
 
-	resp, err := ctxhttp.Post(ctx, c, n.conf.APIURL.String(), contentTypeJSON, &buf)
+	resp, err := post(ctx, c, n.conf.APIURL.String(), contentTypeJSON, &buf)
 	if err != nil {
 		return true, err
 	}
@@ -902,7 +902,7 @@ func (n *Hipchat) Notify(ctx context.Context, as ...*types.Alert) (bool, error)
 		return false, err
 	}
 
-	resp, err := ctxhttp.Post(ctx, c, apiURL.String(), contentTypeJSON, &buf)
+	resp, err := post(ctx, c, apiURL.String(), contentTypeJSON, &buf)
 	if err != nil {
 		return true, err
 	}
@@ -1129,7 +1129,7 @@ func (n *OpsGenie) Notify(ctx context.Context, as ...*types.Alert) (bool, error)
 		return false, err
 	}
 
-	resp, err := ctxhttp.Do(ctx, c, req)
+	resp, err := c.Do(req.WithContext(ctx))
 
 	if err != nil {
 		return true, err
@@ -1329,7 +1329,7 @@ func (n *VictorOps) Notify(ctx context.Context, as ...*types.Alert) (bool, error
 		return false, err
 	}
 
-	resp, err := ctxhttp.Post(ctx, c, apiURL.String(), contentTypeJSON, &buf)
+	resp, err := post(ctx, c, apiURL.String(), contentTypeJSON, &buf)
 	if err != nil {
 		return true, err
 	}
@@ -1426,7 +1426,7 @@ func (n *Pushover) Notify(ctx context.Context, as ...*types.Alert) (bool, error)
 		return false, err
 	}
 
-	resp, err := ctxhttp.Post(ctx, c, u.String(), "text/plain", nil)
+	resp, err := post(ctx, c, u.String(), "text/plain", nil)
 	if err != nil {
 		return true, err
 	}
@@ -1506,3 +1506,12 @@ func hashKey(s string) string {
 	h.Write([]byte(s))
 	return fmt.Sprintf("%x", h.Sum(nil))
 }
+
+func post(ctx context.Context, client *http.Client, url string, bodyType string, body io.Reader) (*http.Response, error) {
+	req, err := http.NewRequest("POST", url, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", bodyType)
+	return client.Do(req.WithContext(ctx))
+}

notify/impl_test.go

@@ -14,6 +14,7 @@
 package notify
 
 import (
+	"context"
 	"fmt"
 	"io/ioutil"
 	"net/http"
@@ -23,7 +24,6 @@ import (
 
 	"github.com/go-kit/kit/log"
 	"github.com/stretchr/testify/require"
-	"golang.org/x/net/context"
 
 	"github.com/prometheus/alertmanager/config"
 	"github.com/prometheus/alertmanager/template"

notify/notify.go

@@ -14,6 +14,7 @@
 package notify
 
 import (
+	"context"
 	"fmt"
 	"sort"
 	"sync"
@@ -25,7 +26,6 @@ import (
 	"github.com/go-kit/kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/model"
-	"golang.org/x/net/context"
 
 	"github.com/prometheus/alertmanager/cluster"
 	"github.com/prometheus/alertmanager/config"

notify/notify_test.go

@@ -13,6 +13,7 @@
 package notify
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"io"
@@ -23,7 +24,6 @@ import (
 	"github.com/go-kit/kit/log"
 	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
-	"golang.org/x/net/context"
 
 	"github.com/prometheus/alertmanager/nflog"
 	"github.com/prometheus/alertmanager/nflog/nflogpb"
@@ -617,7 +617,7 @@ func TestSilenceStage(t *testing.T) {
 	// the WasSilenced flag set to true afterwards.
 	marker.SetSilenced(inAlerts[1].Fingerprint(), "123")
 
-	_, alerts, err := silencer.Exec(nil, log.NewNopLogger(), inAlerts...)
+	_, alerts, err := silencer.Exec(context.Background(), log.NewNopLogger(), inAlerts...)
 	if err != nil {
 		t.Fatalf("Exec failed: %s", err)
 	}
@@ -665,7 +665,7 @@ func TestInhibitStage(t *testing.T) {
 		})
 	}
 
-	_, alerts, err := inhibitor.Exec(nil, log.NewNopLogger(), inAlerts...)
+	_, alerts, err := inhibitor.Exec(context.Background(), log.NewNopLogger(), inAlerts...)
 	if err != nil {
 		t.Fatalf("Exec failed: %s", err)
 	}

test/with_api_v1/acceptance.go

@@ -15,6 +15,7 @@ package test
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -30,7 +31,6 @@ import (
 
 	"github.com/prometheus/client_golang/api"
 	"github.com/prometheus/common/model"
-	"golang.org/x/net/context"
 
 	"github.com/prometheus/alertmanager/client"
 )

test/with_api_v2/acceptance.go

@@ -15,6 +15,7 @@ package test
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -35,7 +36,6 @@ import (
 
 	httptransport "github.com/go-openapi/runtime/client"
 	"github.com/go-openapi/strfmt"
-	"golang.org/x/net/context"
 )
 
 // AcceptanceTest provides declarative definition of given inputs and expected

test/with_api_v2/api_v2_client/client/alert/get_alerts_parameters.go

@@ -6,11 +6,10 @@ package alert
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/alert/post_alerts_parameters.go

@@ -6,11 +6,10 @@ package alert
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/general/get_receivers_parameters.go

@@ -6,11 +6,10 @@ package general
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/general/get_status_parameters.go

@@ -6,11 +6,10 @@ package general
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/receiver/get_receivers_parameters.go

@@ -6,11 +6,10 @@ package receiver
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/silence/delete_silence_parameters.go

@@ -6,11 +6,10 @@ package silence
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/silence/get_silence_parameters.go

@@ -6,11 +6,10 @@ package silence
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/silence/get_silences_parameters.go

@@ -6,11 +6,10 @@ package silence
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"

test/with_api_v2/api_v2_client/client/silence/post_silences_parameters.go

@@ -6,11 +6,10 @@ package silence
 // Editing this file might prove futile when you re-run the swagger generate command
 
 import (
+	"context"
 	"net/http"
 	"time"
 
-	"golang.org/x/net/context"
-
 	"github.com/go-openapi/errors"
 	"github.com/go-openapi/runtime"
 	cr "github.com/go-openapi/runtime/client"