Reduce number of test runs.

.github/workflows/nightly-tests-macos-cpu.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/nightly-tests-ubuntu-conda-cpu.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/nightly-tests-ubuntu-conda-cuda.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/nightly-tests-ubuntu-pip-cpu.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/nightly-tests-ubuntu-pip-cuda.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/nightly-tests-windows-pip-cpu.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/nightly-tests-windows-pip-cuda.yml

@@ -27,7 +27,24 @@ on:
     - cron: "50 23 * * *"
 
 jobs:
+  enable_nightly_build:
+    runs-on: ubuntu-latest
+    outputs:
+      enabled: ${{ steps.set-enabled.outputs.enabled }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set enabled
+        id: set-enabled
+        run: |
+          enabled=$(python scripts/github_actions/run-nightly-build.py)
+          echo "enabled: $enabled"
+          echo "::set-output name=enabled::${enabled}"
+
   generate_build_matrix:
+    needs: enable_nightly_build
+    if: needs.enable_nightly_build.outputs.enabled == 'true'
     # see https://github.com/pytorch/pytorch/pull/50633
     runs-on: ubuntu-latest
     outputs:

.github/workflows/run-tests-macos-cpu.yml

@@ -39,8 +39,8 @@ jobs:
         id: set-matrix
         run: |
           # outputting for debugging purposes
-          python scripts/github_actions/generate_build_matrix.py
-          MATRIX=$(python scripts/github_actions/generate_build_matrix.py)
+          python scripts/github_actions/generate_build_matrix.py --test-only-latest-torch
+          MATRIX=$(python scripts/github_actions/generate_build_matrix.py --test-only-latest-torch)
           echo "::set-output name=matrix::${MATRIX}"
 
   run_tests_macos_cpu:

.github/workflows/run-tests-ubuntu-cpu.yml

@@ -39,8 +39,8 @@ jobs:
         id: set-matrix
         run: |
           # outputting for debugging purposes
-          python scripts/github_actions/generate_build_matrix.py
-          MATRIX=$(python scripts/github_actions/generate_build_matrix.py)
+          python scripts/github_actions/generate_build_matrix.py --test-only-latest-torch
+          MATRIX=$(python scripts/github_actions/generate_build_matrix.py --test-only-latest-torch)
           echo "::set-output name=matrix::${MATRIX}"
 
   run_tests_ubuntu_cpu:

.github/workflows/run-tests-windows-cpu.yml

@@ -39,8 +39,8 @@ jobs:
         id: set-matrix
         run: |
           # outputting for debugging purposes
-          python scripts/github_actions/generate_build_matrix.py
-          MATRIX=$(python scripts/github_actions/generate_build_matrix.py)
+          python scripts/github_actions/generate_build_matrix.py --test-only-latest-torch
+          MATRIX=$(python scripts/github_actions/generate_build_matrix.py --test-only-latest-torch)
           echo "::set-output name=matrix::${MATRIX}"
 
   run_tests_windows_cpu:

scripts/github_actions/run-nightly-build.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# Copyright    2022  Xiaomi Corp.        (authors: Fangjun Kuang)
+
+import subprocess
+from datetime import datetime, timedelta
+
+
+def get_last_commit_date() -> datetime:
+    date = (
+        subprocess.check_output(
+            [
+                "git",
+                "log",
+                "-1",
+                "--format=%ad",
+                "--date=unix",
+            ]
+        )
+        .decode("ascii")
+        .strip()
+    )
+    return datetime.utcfromtimestamp(int(date))
+
+
+def main():
+    last_commit_date_utc = get_last_commit_date()
+    now_utc = datetime.utcnow()
+    if last_commit_date_utc + timedelta(days=1) > now_utc:
+        print("true")
+    else:
+        print("false")
+
+
+if __name__ == "__main__":
+    main()