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dynamo/.github/workflows/fern-docs.yml

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# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Consolidated Fern Documentation Workflow
#
# This workflow handles all Fern documentation automation:
#
# 1. LINT (PRs): Validates Fern configuration and checks for broken links
# - Triggers on pull requests when fern/** files change
# - Runs `fern check` and `fern docs broken-links`
#
# 2. SYNC vNEXT (push to main): Syncs fern/ from main to docs-website branch
# - Triggers on push to main when fern/** files change
# - Preserves versioned documentation snapshots on docs-website branch
#
# 3. VERSION RELEASE (tags): Creates versioned documentation snapshot
# - Triggers on new version tags (vX.Y.Z format)
# - Creates pages-vX.Y.Z/ directory on docs-website branch
# - Updates docs.yml with new version entry
name: Fern Docs
on:
push:
branches:
- main
- "pull-request/[0-9]+"
tags:
# Match only clean semver tags: vX.Y.Z
- 'v[0-9]+.[0-9]+.[0-9]+'
workflow_dispatch:
inputs:
tag:
description: 'Version tag to release (e.g., v0.9.0). Leave empty to sync vNext.'
required: false
type: string
permissions:
contents: write
jobs:
# Detect changed files for conditional job execution
changed-files:
runs-on: ubuntu-latest
# Skip for tag pushes - version release doesn't need changed-files check
if: github.ref_type != 'tag'
outputs:
fern: ${{ steps.changes.outputs.fern }}
steps:
- name: Checkout code
uses: actions/checkout@v4
with:
fetch-depth: 0
- name: Check for changes
id: changes
uses: ./.github/actions/changed-files
with:
gh_token: ${{ github.token }}
#############################################################################
# LINT JOBS - Run on PRs when fern/** files change
#############################################################################
fern-check:
name: Fern Configuration Check
needs: changed-files
if: |
github.ref_type != 'tag' &&
needs.changed-files.outputs.fern == 'true' &&
(github.event_name == 'pull_request' || startsWith(github.ref, 'refs/heads/pull-request/'))
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Setup Node.js
uses: actions/setup-node@v4
with:
node-version: '22'
- name: Install Fern CLI
run: npm install -g fern-api
- name: Validate Fern configuration
working-directory: fern
run: fern check
fern-broken-links:
name: Fern Broken Links Check
needs: changed-files
if: |
github.ref_type != 'tag' &&
needs.changed-files.outputs.fern == 'true' &&
(github.event_name == 'pull_request' || startsWith(github.ref, 'refs/heads/pull-request/'))
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Setup Node.js
uses: actions/setup-node@v4
with:
node-version: '22'
- name: Install Fern CLI
run: npm install -g fern-api
- name: Check for broken links
working-directory: fern
run: fern docs broken-links
#############################################################################
# SYNC vNEXT - Run on push to main when fern/** files change
#############################################################################
sync-vnext:
name: Sync vNext to docs-website
needs: changed-files
if: |
github.ref == 'refs/heads/main' &&
(needs.changed-files.outputs.fern == 'true' || github.event_name == 'workflow_dispatch') &&
(github.event.inputs.tag == '' || github.event.inputs.tag == null)
runs-on: ubuntu-latest
steps:
- name: Checkout main branch
uses: actions/checkout@v4
with:
ref: main
path: main-checkout
fetch-depth: 1
- name: Checkout docs-website branch
uses: actions/checkout@v4
with:
ref: docs-website
path: fern-checkout
fetch-depth: 1
token: ${{ secrets.GITHUB_TOKEN }}
- name: Setup Git
run: |
cd fern-checkout
git config user.name "github-actions[bot]"
git config user.email "github-actions[bot]@users.noreply.github.com"
- name: Sync vNext content from main
run: |
# Sync pages/ directory (vNext content)
echo "Syncing pages/ from main to docs-website branch..."
rm -rf fern-checkout/fern/pages
cp -r main-checkout/fern/pages fern-checkout/fern/pages
# Sync versions/next.yml (vNext navigation)
echo "Syncing versions/next.yml from main to docs-website branch..."
cp main-checkout/fern/versions/next.yml fern-checkout/fern/versions/next.yml
# Sync assets/ directory
echo "Syncing assets/ from main to docs-website branch..."
rm -rf fern-checkout/fern/assets
cp -r main-checkout/fern/assets fern-checkout/fern/assets
# Sync fern.config.json
echo "Syncing fern.config.json from main to docs-website branch..."
cp main-checkout/fern/fern.config.json fern-checkout/fern/fern.config.json
# Sync .gitignore if it exists
if [ -f main-checkout/fern/.gitignore ]; then
cp main-checkout/fern/.gitignore fern-checkout/fern/.gitignore
fi
# Sync convert_callouts.py script
if [ -f main-checkout/fern/convert_callouts.py ]; then
cp main-checkout/fern/convert_callouts.py fern-checkout/fern/convert_callouts.py
fi
- name: Convert GitHub callouts to Fern format
run: |
echo "Converting GitHub-style callouts to Fern format in pages/..."
python3 fern-checkout/fern/convert_callouts.py --dir fern-checkout/fern/pages
echo "Callout conversion complete."
- name: Update docs.yml preserving versions
run: |
cd fern-checkout/fern
# Extract the list of versioned entries from current docs.yml (on docs-website branch)
# These are entries after "path: ./versions/next.yml"
# We need to preserve them while updating the rest from main
# Get version entries (lines containing "display-name: v" and their path lines)
VERSION_ENTRIES=$(awk '/- display-name: v/{found=1} found{print; if(/path:/) found=0}' docs.yml)
# Copy docs.yml from main as base
cp ../../main-checkout/fern/docs.yml docs.yml
# If we had version entries, append them after the next.yml line
if [ -n "$VERSION_ENTRIES" ]; then
echo "Preserving version entries:"
echo "$VERSION_ENTRIES"
# Create a temp file with the version entries properly indented
echo "$VERSION_ENTRIES" > /tmp/version_entries.txt
# Insert version entries after the next.yml path line
sed -i '/path: \.\/versions\/next\.yml/r /tmp/version_entries.txt' docs.yml
fi
echo "Updated docs.yml:"
cat docs.yml
- name: Check for changes
id: changes
run: |
cd fern-checkout
if git diff --quiet && git diff --cached --quiet; then
echo "has_changes=false" >> $GITHUB_OUTPUT
echo "No changes detected"
else
echo "has_changes=true" >> $GITHUB_OUTPUT
echo "Changes detected:"
git status --short
fi
- name: Commit and push changes
if: steps.changes.outputs.has_changes == 'true'
run: |
cd fern-checkout
git add -A
git commit -m "docs(fern): sync vNext from main
Automated sync of fern/ directory from main branch.
Preserves versioned documentation snapshots.
Source commit: ${{ github.sha }}"
git push origin docs-website
echo "Successfully synced vNext docs to docs-website branch"
#############################################################################
# VERSION RELEASE - Run on new version tags (vX.Y.Z)
#############################################################################
release-version:
name: Release Version to docs-website
# Run on tag push OR manual dispatch with a tag specified
if: |
github.ref_type == 'tag' ||
(github.event_name == 'workflow_dispatch' && github.event.inputs.tag != '' && github.event.inputs.tag != null)
runs-on: ubuntu-latest
steps:
- name: Determine version tag
id: version
run: |
if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
TAG="${{ github.event.inputs.tag }}"
else
TAG="${GITHUB_REF#refs/tags/}"
fi
# Validate tag format (must be vX.Y.Z exactly)
if ! echo "$TAG" | grep -qE '^v[0-9]+\.[0-9]+\.[0-9]+$'; then
echo "::error::Invalid tag format: $TAG. Must be vX.Y.Z (e.g., v0.9.0)"
exit 1
fi
# Extract version without 'v' prefix
VERSION="${TAG#v}"
echo "tag=$TAG" >> $GITHUB_OUTPUT
echo "version=$VERSION" >> $GITHUB_OUTPUT
echo "Processing version: $VERSION (tag: $TAG)"
- name: Checkout docs-website branch
uses: actions/checkout@v4
with:
ref: docs-website
fetch-depth: 0
token: ${{ secrets.GITHUB_TOKEN }}
- name: Check if version already exists
run: |
TAG="${{ steps.version.outputs.tag }}"
if [ -d "fern/pages-$TAG" ]; then
echo "::error::Version $TAG already exists (fern/pages-$TAG directory found)"
exit 1
fi
if [ -f "fern/versions/$TAG.yml" ]; then
echo "::error::Version $TAG already exists (fern/versions/$TAG.yml found)"
exit 1
fi
echo "Version $TAG does not exist yet, proceeding with release"
- name: Setup Git
run: |
git config user.name "github-actions[bot]"
git config user.email "github-actions[bot]@users.noreply.github.com"
- name: Create versioned pages directory
run: |
TAG="${{ steps.version.outputs.tag }}"
echo "Creating fern/pages-$TAG/ from fern/pages/..."
# Copy current pages/ to pages-vX.Y.Z/
cp -r fern/pages "fern/pages-$TAG"
echo "Created fern/pages-$TAG/"
ls -la "fern/pages-$TAG/" | head -20
- name: Update GitHub links to 'main' to version tag
run: |
TAG="${{ steps.version.outputs.tag }}"
echo "Updating GitHub links from 'tree/main' to 'tree/$TAG' in fern/pages-$TAG/..."
# Find all markdown files and replace tree/main with tree/vX.Y.Z
find "fern/pages-$TAG" -name "*.md" -o -name "*.mdx" | while read file; do
if grep -q "github.com/ai-dynamo/dynamo/tree/main" "$file"; then
echo "Updating: $file"
sed -i "s|github.com/ai-dynamo/dynamo/tree/main|github.com/ai-dynamo/dynamo/tree/$TAG|g" "$file"
fi
done
# Also update blob/main references (for direct file links)
find "fern/pages-$TAG" -name "*.md" -o -name "*.mdx" | while read file; do
if grep -q "github.com/ai-dynamo/dynamo/blob/main" "$file"; then
echo "Updating blob links: $file"
sed -i "s|github.com/ai-dynamo/dynamo/blob/main|github.com/ai-dynamo/dynamo/blob/$TAG|g" "$file"
fi
done
echo "GitHub link update complete."
- name: Convert GitHub callouts to Fern format
run: |
TAG="${{ steps.version.outputs.tag }}"
echo "Converting GitHub-style callouts to Fern format in pages-$TAG/..."
python3 fern/convert_callouts.py --dir "fern/pages-$TAG"
echo "Callout conversion complete."
- name: Create version config file
run: |
TAG="${{ steps.version.outputs.tag }}"
VERSION="${{ steps.version.outputs.version }}"
VERSION_FILE="fern/versions/$TAG.yml"
echo "Creating version config: $VERSION_FILE"
# Copy next.yml as template
cp fern/versions/next.yml "$VERSION_FILE"
# Update the comment at the top
sed -i "s/# Navigation structure for Latest version/# Navigation structure for $TAG version/" "$VERSION_FILE"
sed -i "s|# Matching https://docs.nvidia.com/dynamo/latest/|# Snapshot from tag $TAG|" "$VERSION_FILE"
# Update all page paths from ../pages/ to ../pages-vX.Y.Z/
sed -i "s|path: \.\./pages/|path: ../pages-$TAG/|g" "$VERSION_FILE"
echo "Created $VERSION_FILE"
echo "First 30 lines:"
head -30 "$VERSION_FILE"
- name: Update docs.yml with new version
run: |
TAG="${{ steps.version.outputs.tag }}"
DOCS_FILE="fern/docs.yml"
echo "Updating $DOCS_FILE to include $TAG..."
# Check if version already in docs.yml
if grep -q "display-name: $TAG" "$DOCS_FILE"; then
echo "Version $TAG already in docs.yml, skipping update"
exit 0
fi
# Insert new version after "Next" entry
# The new version should be inserted after the "path: ./versions/next.yml" line
# Use a temp file approach for reliable multi-line insertion
awk -v tag="$TAG" '
/path: \.\/versions\/next\.yml/ {
print
print " - display-name: " tag
print " path: ./versions/" tag ".yml"
next
}
{ print }
' "$DOCS_FILE" > "${DOCS_FILE}.tmp" && mv "${DOCS_FILE}.tmp" "$DOCS_FILE"
echo "Updated docs.yml versions section:"
grep -A 20 "^versions:" "$DOCS_FILE"
- name: Commit and push changes
run: |
TAG="${{ steps.version.outputs.tag }}"
git add "fern/pages-$TAG/"
git add "fern/versions/$TAG.yml"
git add fern/docs.yml
git commit -m "docs(fern): release version $TAG
- Created fern/pages-$TAG/ with documentation snapshot
- Created fern/versions/$TAG.yml version navigation config
- Updated fern/docs.yml to include $TAG in version list
Automated by fern-docs workflow
Source tag: $TAG"
git push origin docs-website
echo "Successfully released documentation for $TAG on docs-website branch"
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