Re-enable link linter (#153280)

And make URL linter always succeed for now.
I'll monitor the logs manually and experiment with it futher.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/153280
Approved by: https://github.com/albanD

.github/workflows/_link_check.yml

@@ -7,29 +7,25 @@ on:
       ref:
         type: string
         required: true
-      run-url-lint:
-        type: boolean
-        required: false
-        default: false
 
 jobs:
   lint-urls:
-    if: ${{ inputs.run-url-lint }}
+    if: ${{ github.event_name != 'pull_request' || !contains(github.event.pull_request.labels.*.name, 'skip-url-lint') }}
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     with:
       timeout: 120
       runner: ${{ inputs.runner }}linux.2xlarge
-      docker-image: pytorch-linux-focal-linter
+      docker-image: ci-image:pytorch-linux-focal-linter
       fetch-depth: 0
       submodules: false
       ref: ${{ inputs.ref }}
       script: |
         ./scripts/lint_urls.sh $(
-          { [ "${{ github.event_name }}" = "pull_request" ] \
-              && git diff --name-only "${{ github.event.pull_request.base.sha }}...${{ github.event.pull_request.head.sha }}"; } \
-          || \
-          { [ "${{ github.event_name }}" = "push" ] \
-              && git diff --name-only "${{ github.event.before }}...${{ github.sha }}"; }
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            echo "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}"
+          else
+            echo "${{ github.event.before }}" "${{ github.sha }}"
+          fi
         ) || {
           echo
           echo "URL lint failed."
@@ -44,17 +40,17 @@ jobs:
     with:
       timeout: 60
       runner: ${{ inputs.runner }}linux.2xlarge
-      docker-image: pytorch-linux-focal-linter
+      docker-image: ci-image:pytorch-linux-focal-linter
       fetch-depth: 0
       submodules: false
       ref: ${{ inputs.ref }}
       script: |
         ./scripts/lint_xrefs.sh $(
-          { [ "${{ github.event_name }}" = "pull_request" ] \
-              && git diff --name-only "${{ github.event.pull_request.base.sha }}...${{ github.event.pull_request.head.sha }}"; } \
-          || \
-          { [ "${{ github.event_name }}" = "push" ] \
-              && git diff --name-only "${{ github.event.before }}...${{ github.sha }}"; }
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            echo "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}"
+          else
+            echo "${{ github.event.before }}" "${{ github.sha }}"
+          fi
         ) || {
           echo
           echo "Xref lint failed."

.github/workflows/lint.yml

@@ -283,6 +283,15 @@ jobs:
           # All we need to see is that it passes
           python3 torch/utils/collect_env.py
 
+  link-check:
+    name: Link checks
+    needs: get-label-type
+    uses: ./.github/workflows/_link_check.yml
+    with:
+      runner: ${{ needs.get-label-type.outputs.label-type }}
+      ref:    ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+    secrets: inherit
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}-${{ github.event_name == 'workflow_dispatch' }}
   cancel-in-progress: true

.github/workflows/nightly.yml

@@ -34,7 +34,6 @@ jobs:
     with:
       runner: ${{ needs.get-label-type.outputs.label-type }}
       ref:    ${{ github.sha }}
-      run-url-lint: true
     secrets: inherit
 
   docs-build:

scripts/lint_urls.sh

@@ -61,7 +61,7 @@ while IFS=: read -r filepath url; do
   while [ "$(running_jobs)" -ge "$max_jobs" ]; do
     sleep 1
   done
- done < <(
+done < <(
   pattern='(?!.*@lint-ignore)(?<!git\+)(?<!\$\{)https?://(?![^/]*@)(?![^\s<>\")]*[<>\{\}\$])[^[:space:]<>")\[\]\\|]+'
   excludes=(
     ':(exclude,glob)**/.*'
@@ -73,12 +73,17 @@ while IFS=: read -r filepath url; do
     ':(exclude,glob)**/third-party/**'
     ':(exclude,glob)**/third_party/**'
   )
-  if [ $# -gt 0 ]; then
-    paths=("$@")
+  if [ $# -eq 2 ]; then
+    for filename in $(git diff --name-only --unified=0 "$1...$2"); do
+      git diff --unified=0 "$1...$2" -- "$filename" "${excludes[@]}" \
+        | grep -E '^\+' \
+        | grep -Ev '^\+\+\+' \
+        | perl -nle 'print for m#'"$pattern"'#g' \
+        | sed 's|^|'"$filename"':|'
+    done
   else
-    paths=('*')
-  fi
-  git --no-pager grep --no-color -I -P -o "$pattern" -- "${paths[@]}" "${excludes[@]}" \
+    git --no-pager grep --no-color -I -P -o "$pattern" -- . "${excludes[@]}"
+  fi \
   | sed -E 's/[^/[:alnum:]]+$//' \
   | grep -Ev '://(0\.0\.0\.0|127\.0\.0\.1|localhost)([:/])' \
   | grep -Ev '://[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' \

scripts/lint_xrefs.sh

@@ -29,12 +29,17 @@ done < <(
     ':(exclude,glob)**/third-party/**'
     ':(exclude,glob)**/third_party/**'
   )
-  if [ $# -gt 0 ]; then
-    paths=("$@")
+  if [ $# -eq 2 ]; then
+    for filename in $(git diff --name-only --unified=0 "$1...$2"); do
+      git diff --unified=0 "$1...$2" -- "$filename" "${excludes[@]}" \
+        | grep -E '^\+' \
+        | grep -Ev '^\+\+\+' \
+        | perl -nle 'print for m#'"$pattern"'#g' \
+        | sed 's|^|'"$filename"':|'
+    done
   else
-    paths=('*')
-  fi
-  git --no-pager grep --no-color -I -P -o "$pattern" -- "${paths[@]}" "${excludes[@]}" \
+    git --no-pager grep --no-color -I -P -o "$pattern" -- . "${excludes[@]}"
+  fi \
   | grep -Ev 'https?://' \
   | sed -E \
       -e 's#([^:]+):\[[^]]+\]\(([^)]+)\)#\1:\2#' \