Refine the issue-labeler config for this repo. Add comments and a doc.

.github/workflows/labeler-cache-retention.yml

@@ -1,3 +1,8 @@
+# Workflow template imported and updated from:
+# https://github.com/dotnet/issue-labeler/wiki/Onboarding
+#
+# See labeler.md for more information
+#
 # Regularly restore the prediction models from cache to prevent cache eviction
 name: "Labeler: Cache Retention"
 

.github/workflows/labeler-predict-issues.yml

@@ -1,3 +1,8 @@
+# Workflow template imported and updated from:
+# https://github.com/dotnet/issue-labeler/wiki/Onboarding
+#
+# See labeler.md for more information
+#
 # Predict labels for Issues using a trained model
 name: "Labeler: Predict (Issues)"
 
@@ -24,7 +29,6 @@ env:
   LABEL_PREFIX: "area-"
   THRESHOLD: 0.40
   DEFAULT_LABEL: "needs-area-label"
-  EXCLUDED_AUTHORS: "" # Comma-separated list of authors to exclude from training data
 
 jobs:
   predict-issue-label:
@@ -51,7 +55,6 @@ jobs:
           label_prefix: ${{ env.LABEL_PREFIX }}
           threshold: ${{ env.THRESHOLD }}
           default_label: ${{ env.DEFAULT_LABEL }}
-          excluded_authors: ${{ env.EXCLUDED_AUTHORS }}
         env:
           GITHUB_TOKEN: ${{ github.token }}
         continue-on-error: ${{ !env.ALLOW_FAILURE }}

.github/workflows/labeler-predict-pulls.yml

@@ -1,3 +1,8 @@
+# Workflow template imported and updated from:
+# https://github.com/dotnet/issue-labeler/wiki/Onboarding
+#
+# See labeler.md for more information
+#
 # Predict labels for Pull Requests using a trained model
 name: "Labeler: Predict (Pulls)"
 
@@ -37,7 +42,6 @@ env:
   LABEL_PREFIX: "area-"
   THRESHOLD: 0.40
   DEFAULT_LABEL: "needs-area-label"
-  EXCLUDED_AUTHORS: "" # Comma-separated list of authors to exclude from training data
 
 jobs:
   predict-pull-label:
@@ -64,7 +68,6 @@ jobs:
           label_prefix: ${{ env.LABEL_PREFIX }}
           threshold: ${{ env.THRESHOLD }}
           default_label: ${{ env.DEFAULT_LABEL }}
-          excluded_authors: ${{ env.EXCLUDED_AUTHORS }}
         env:
           GITHUB_TOKEN: ${{ github.token }}
         continue-on-error: ${{ !env.ALLOW_FAILURE }}

.github/workflows/labeler-promote.yml

@@ -1,3 +1,8 @@
+# Workflow template imported and updated from:
+# https://github.com/dotnet/issue-labeler/wiki/Onboarding
+#
+# See labeler.md for more information
+#
 # Promote a model from staging to 'ACTIVE', backing up the currently 'ACTIVE' model
 name: "Labeler: Promotion"
 

.github/workflows/labeler-train.yml

@@ -1,3 +1,8 @@
+# Workflow template imported and updated from:
+# https://github.com/dotnet/issue-labeler/wiki/Onboarding
+#
+# See labeler.md for more information
+#
 # Train the Issues and Pull Requests models for label prediction
 name: "Labeler: Training"
 
@@ -29,7 +34,7 @@ on:
         description: "Max number of items to download for training/testing the model (newest items are used). Defaults to the max number of pages times the page size."
         type: number
       page_size:
-        description: "Number of items per page in GitHub API requests. Defaults to 100 for issues, 25 for pull requests."
+        description: "Number of items per page in GitHub API requests. Defaults to 100 for issues. Always uses 1 for pull requests."
         type: number
       page_limit:
         description: "Maximum number of pages to download for training/testing the model. Defaults to 1000 for issues, 4000 for pull requests."
@@ -84,8 +89,8 @@ jobs:
           repository: ${{ env.REPOSITORY }}
           label_prefix: ${{ env.LABEL_PREFIX }}
           limit: ${{ env.LIMIT }}
-          page_size: ${{ env.PAGE_SIZE }}
-          page_limit: ${{ env.PAGE_LIMIT }}
+          page_size: 1 # This repository can only successfully download pulls one at a time due to GitHub's API performance
+          page_limit: 10000 # Download the newest 10,000 pull requests
           excluded_authors: ${{ env.EXCLUDED_AUTHORS }}
         env:
           GITHUB_TOKEN: ${{ github.token }}
@@ -154,8 +159,8 @@ jobs:
           label_prefix: ${{ env.LABEL_PREFIX }}
           threshold: ${{ env.THRESHOLD }}
           limit: ${{ env.LIMIT }}
-          page_size: ${{ env.PAGE_SIZE }}
-          page_limit: ${{ env.PAGE_LIMIT }}
+          page_size: 1 # This repository can only successfully download pulls one at a time due to GitHub's API performance
+          page_limit: 10000 # Download the newest 10,000 pull requests
           excluded_authors: ${{ env.EXCLUDED_AUTHORS }}
         env:
           GITHUB_TOKEN: ${{ github.token }}

.github/workflows/labeler.md

@@ -0,0 +1,32 @@
+# Issue-Labeler Workflows
+
+This repository uses actions from [dotnet/issue-labeler](https://github.com/dotnet/issue-labeler) to predict area labels for issues and pull requests.
+
+The following workflow templates were imported and updated from [dotnet/issue-labeler/wiki/Onboarding](https://github.com/dotnet/issue-labeler/wiki/Onboarding):
+
+1. `labeler-cache-retention.yml`
+2. `labeler-predict-issues.yml`
+3. `labeler-predict-pulls.yml`
+4. `labeler-promote.yml`
+5. `labeler-train.yml`
+
+## Repository Configuration
+
+Across these workflows, the following changes were made to configure the issue labeler for this repository:
+
+1. Set `LABEL_PREFIX` to `"area-"`:
+    - `labeler-predict-issues.yml`
+    - `labeler-predict-pulls.yml`
+    - `labeler-train.yml`
+2. Set `DEFAULT_LABEL` to `"needs-area-label"`:
+    - `labeler-predict-issues.yml`
+    - `labeler-predict-pulls.yml`
+3. Remove the `EXCLUDED_AUTHORS` value as we do not bypass labeling for any authors' issues/pulls in this repository:
+    - `labeler-predict-issues.yml`
+    - `labeler-predict-pulls.yml`
+4. Remove the `repository` input for training the models against another repository:
+    - `labeler-train.yml`
+5. Hard-code the `page_size` to 1 and `page_limit` to 10000 for pull requests
+    - `labeler-train.yml` (on both the `download-pulls` and `test-pulls` jobs)
+6. Update the cache retention cron schedule to an arbitrary time of day:
+    - `labeler-cache-retention.yml`