Decouple inputs from default GitHub env vars

Instead of reading built-in GitHub environment variables directly, the caller must
map these to environment variables defined explicitly for this plugin.
This will allow us to use modified input parameters in GitHub Actions
without overriding these built-in environment variable.

.github/workflows/gradle.yml

@@ -72,8 +72,11 @@ jobs:
             run: ./plugin-self-test ForceDependencyResolutionPlugin_resolveAllDependencies
             env:
                 GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-                GITHUB_JOB_ID: ${{ github.run_id }}
-                GITHUB_JOB_CORRELATOR: "plugin-self-test"
+                GITHUB_DEPENDENCY_GRAPH_JOB_ID: ${{ github.run_id }}
+                GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR: "plugin-self-test"
+                GITHUB_DEPENDENCY_GRAPH_REF: ${{ github.ref }}
+                GITHUB_DEPENDENCY_GRAPH_SHA: ${{ github.sha }}
+                GITHUB_DEPENDENCY_GRAPH_WORKSPACE: ${{ github.workspace }}
 
           - name: Save plugin JSON report
             uses: actions/upload-artifact@v3

README.md

@@ -30,11 +30,11 @@ This causes 2 separate plugins to be applied, that can be used independently:
 ### Required environment variables
 
 The following environment variables configure the snapshot generated by the `GitHubDependencyExtractorPlugin`. See the [GitHub Dependency Submission API docs](https://docs.github.com/en/rest/dependency-graph/dependency-submission?apiVersion=2022-11-28) for details:
-- `GITHUB_JOB_CORRELATOR`: Sets the `job.correlator` value for the dependency submission
-- `GITHUB_JOB_ID`: Sets the `job.id` value for the dependency submission
-- `GITHUB_REF`: Sets the `ref` value for the dependency submission
-- `GITHUB_SHA`: Sets the `sha` value for the dependency submission
-- `GITHUB_WORKSPACE`: Sets the root directory of the github repository
+- `GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR`: Sets the `job.correlator` value for the dependency submission
+- `GITHUB_DEPENDENCY_GRAPH_JOB_ID`: Sets the `job.id` value for the dependency submission
+- `GITHUB_DEPENDENCY_GRAPH_REF`: Sets the `ref` value for the commit that generated the dependency graph
+- `GITHUB_DEPENDENCY_GRAPH_SHA`: Sets the `sha` value for the commit that generated the dependency graph
+- `GITHUB_DEPENDENCY_GRAPH_WORKSPACE`: Sets the root directory of the github repository
 - `DEPENDENCY_GRAPH_REPORT_DIR` (optional): Specifies where the dependency graph report will be generated
 
 Each of these values can also be provided via a system property. 

plugin-self-test-local

@@ -1,9 +1,9 @@
 #!/bin/sh
 
-export GITHUB_JOB_ID="42"
-export GITHUB_JOB_CORRELATOR="plugin-self-test"
-export GITHUB_REF="refs/heads/main"
-export GITHUB_SHA=$( git rev-parse HEAD )
-export GITHUB_WORKSPACE=$( pwd )
+export GITHUB_DEPENDENCY_GRAPH_JOB_ID="42"
+export GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR="plugin-self-test"
+export GITHUB_DEPENDENCY_GRAPH_REF="refs/heads/main"
+export GITHUB_DEPENDENCY_GRAPH_SHA=$( git rev-parse HEAD )
+export GITHUB_DEPENDENCY_GRAPH_WORKSPACE=$( pwd )
 
 ./plugin-self-test $*

plugin-test/src/test/groovy/org/gradle/github/dependencygraph/BaseExtractorTest.groovy

@@ -289,12 +289,12 @@ abstract class BaseExtractorTest extends Specification {
 
         Map<String, String> asEnvironmentMap() {
             return [
-                "GITHUB_JOB_ID"        : jobId,
-                "GITHUB_JOB_CORRELATOR": jobCorrelator,
+                "GITHUB_DEPENDENCY_GRAPH_JOB_ID"        : jobId,
+                "GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR": jobCorrelator,
                 "DEPENDENCY_GRAPH_REPORT_DIR"    : reportDir,
-                "GITHUB_REF"                            : ref,
-                "GITHUB_SHA"                            : sha,
-                "GITHUB_WORKSPACE"                      : workspace,
+                "GITHUB_DEPENDENCY_GRAPH_REF"                            : ref,
+                "GITHUB_DEPENDENCY_GRAPH_SHA"                            : sha,
+                "GITHUB_DEPENDENCY_GRAPH_WORKSPACE"                      : workspace,
                 "GITHUB_TOKEN"                          : gitHubToken
             ]
         }

plugin-test/src/test/groovy/org/gradle/github/dependencygraph/DependencyExtractorConfigTest.groovy

@@ -38,8 +38,8 @@ class DependencyExtractorConfigTest extends BaseExtractorTest {
 
         when:
         executer
-            .withArgument("-DGITHUB_JOB_CORRELATOR=TEST_CORRELATOR")
-            .withArgument("-DGITHUB_REF=refs/my-branch/foo")
+            .withArgument("-DGITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR=TEST_CORRELATOR")
+            .withArgument("-DGITHUB_DEPENDENCY_GRAPH_REF=refs/my-branch/foo")
         run()
 
         then:
@@ -81,11 +81,11 @@ class DependencyExtractorConfigTest extends BaseExtractorTest {
     def "fails gracefully if configuration values not set"() {
         when:
         def envVars = environmentVars.asEnvironmentMap()
-        envVars.remove("GITHUB_JOB_CORRELATOR")
+        envVars.remove("GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR")
         executer.withEnvironmentVars(envVars)
         def result = executer.runWithFailure()
 
         then:
-        result.output.contains("'GITHUB_JOB_CORRELATOR' must be set")
+        result.output.contains("'GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR' must be set")
     }
 }

plugin/src/main/kotlin/org/gradle/github/dependencygraph/GitHubSnapshotParams.kt

@@ -4,15 +4,15 @@ import org.gradle.dependencygraph.util.PluginParameters
 import java.nio.file.Path
 import java.nio.file.Paths
 
-const val PARAM_JOB_ID = "GITHUB_JOB_ID"
-const val PARAM_JOB_CORRELATOR = "GITHUB_JOB_CORRELATOR"
-const val PARAM_GITHUB_REF = "GITHUB_REF"
-const val PARAM_GITHUB_SHA = "GITHUB_SHA"
+const val PARAM_JOB_ID = "GITHUB_DEPENDENCY_GRAPH_JOB_ID"
+const val PARAM_JOB_CORRELATOR = "GITHUB_DEPENDENCY_GRAPH_JOB_CORRELATOR"
+const val PARAM_GITHUB_REF = "GITHUB_DEPENDENCY_GRAPH_REF"
+const val PARAM_GITHUB_SHA = "GITHUB_DEPENDENCY_GRAPH_SHA"
 /**
  * Environment variable should be set to the workspace directory that the Git repository is checked out in.
  * This is used to determine relative path to build files referenced in the dependency graph.
  */
-const val PARAM_GITHUB_WORKSPACE = "GITHUB_WORKSPACE"
+const val PARAM_GITHUB_WORKSPACE = "GITHUB_DEPENDENCY_GRAPH_WORKSPACE"
 
 class GitHubSnapshotParams(private val pluginParameters: PluginParameters) {
     val dependencyGraphJobCorrelator: String = pluginParameters.load(PARAM_JOB_CORRELATOR)