Support PullRequestTargetEvent (fixes #13)

.github/labeler.yml

@@ -1,8 +1,8 @@
-Version: 1
-Labels:
-  - Label: "TestLabel"
+version: 1
+labels:
+  - label: "TestLabel"
     title: ".*"
-  - Label: "TestFileMatch"
+  - label: "TestFileMatch"
     files: 
       - "cmd/.*.go"
       - "pkg/.*.go"

.github/workflows/main.yml

@@ -1,7 +1,7 @@
 name: Label PRs
 
 on:
-  - pull_request
+  pull_request:
 
 jobs:
   build:

README.md

@@ -33,6 +33,12 @@ jobs:
 Then add a new file `.github/labeler.yml` with the configuration as
 described below in the `Configuration` section.
 
+If you want to run the action on the base of the pull request, rather
+than on the merge commit, you should trigger the action on
+`pull_request_target`.  Check the [GitHub
+documentation](https://docs.github.com/en/actions/reference/events-that-trigger-workflows#pull_request_target)
+for more details.
+
 This action will avoid failing in all cases, so if you're experiencing
 unexpected behaviour it's worth looking at execution logs just in case.
 Typical errors are:

cmd/action.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 
 	"github.com/go-yaml/yaml"
-	"github.com/google/go-github/v27/github"
+	"github.com/google/go-github/v35/github"
 	labeler "github.com/srvaroa/labeler/pkg"
 	"golang.org/x/oauth2"
 )

go.mod

@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/go-yaml/yaml v2.1.0+incompatible
 	github.com/google/go-cmp v0.3.1
-	github.com/google/go-github/v27 v27.0.6
+	github.com/google/go-github/v35 v35.0.0
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/waigani/diffparser v0.0.0-20190828052634-7391f219313d
 	golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be

go.sum

@@ -4,10 +4,13 @@ github.com/go-yaml/yaml v2.1.0+incompatible h1:RYi2hDdss1u4YE7GwixGzWwVo47T8UQwn
 github.com/go-yaml/yaml v2.1.0+incompatible/go.mod h1:w2MrLa16VYP0jy6N7M5kHaCkaLENm+P+Tv+MfurjSw0=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-github/v27 v27.0.6 h1:oiOZuBmGHvrGM1X9uNUAUlLgp5r1UUO/M/KnbHnLRlQ=
 github.com/google/go-github/v27 v27.0.6/go.mod h1:/0Gr8pJ55COkmv+S/yPKCczSkUPIM/LnFyubufRNIS0=
+github.com/google/go-github/v35 v35.0.0 h1:oLrHdYkSQvbhN4gJihpEkTFKAZnIFgTCj1p/OlE4Os4=
+github.com/google/go-github/v35 v35.0.0/go.mod h1:s0515YVTI+IMrDoy9Y4pHt9ShGpzHvHO8rZ7L7acgvs=
 github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
 github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=

pkg/labeler.go

@@ -11,7 +11,7 @@ import (
 	"strconv"
 	"strings"
 
-	gh "github.com/google/go-github/v27/github"
+	gh "github.com/google/go-github/v35/github"
 	"github.com/waigani/diffparser"
 )
 
@@ -195,6 +195,8 @@ func (l *Labeler) HandleEvent(
 	switch event := event.(type) {
 	case *gh.PullRequestEvent:
 		err = l.ExecuteOn(event.PullRequest)
+	case *gh.PullRequestTargetEvent:
+		err = l.ExecuteOn(event.PullRequest)
 	}
 	return err
 }