From c57619cb84012ba88113302d5b0d1119a14dc2e8 Mon Sep 17 00:00:00 2001
From: tczekajlo <t.czekajlo@rasa.com>
Date: Fri, 3 Dec 2021 15:42:13 +0100
Subject: [PATCH] Update documentation workflow to only publish one version per
 major

---
 .github/workflows/documentation.yml | 64 ++++++++++++++++++++++++++++-
 docs/package.json                   |  3 +-
 docs/yarn.lock                      |  2 +-
 scripts/push_docs_to_branch.sh      | 19 +++++----
 4 files changed, 78 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 2e7344111..e0341efe2 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -15,12 +15,74 @@ on:
 env:
   DOCS_FOLDER: docs
   DOCS_BRANCH: documentation
+  TAG_NAME: ${GITHUB_REF#refs/tags/}
+  IS_TAG_BUILD: ${{ startsWith(github.event.ref, 'refs/tags') }}
+  IS_MASTER_BRANCH: ${{ github.ref == 'refs/heads/main' }}
 
 jobs:
+  evaluate_release_tag:
+    name: Evaluate release tag
+    runs-on: ubuntu-latest
+    if: github.repository == 'RasaHQ/rasa-sdk'  # don't run this for main branches of forks, would fail anyways
+    outputs:
+      build_docs: ${{ steps.check_tag.outputs.build_docs }}
+
+    steps:
+    - name: Checkout git repository 🕝
+      uses: actions/checkout@v2
+
+    - name: Check if tag version is equal or higher than the latest tagged Rasa SDK version
+      id: rasa_sdk_get_version
+      run: |
+        # Get latest tagged Rasa SDK version
+        git fetch --depth=1 origin "+refs/tags/*:refs/tags/*"
+        # Fetch branch history
+        git fetch --prune --unshallow
+        LATEST_TAGGED_NON_ALPHA_RASA_SDK_VERSION=$(git tag | sort -r -V | grep -E "^[0-9.]+$" | head -n1)
+        echo "LATEST_TAGGED_NON_ALPHA_RASA_SDK_VERSION=${LATEST_TAGGED_NON_ALPHA_RASA_SDK_VERSION}" >> $GITHUB_ENV
+        # Return 'true' if tag version is equal or higher than the latest tagged Rasa SDK version
+        IS_LATEST_VERSION=$((printf '%s\n%s\n' "${LATEST_TAGGED_NON_ALPHA_RASA_SDK_VERSION}" "$TAG_NAME" \
+          | sort -V -C && echo true || echo false) || true)
+        if [[ "${IS_LATEST_VERSION}" == "true" && "$TAG_NAME" =~ ^[0-9.]+$ ]]; then
+          echo "::set-output name=is_latest_version::true"
+        else
+          echo "::set-output name=is_latest_version::false"
+        fi
+    # MAJOR.MINOR.MICRO(PATCH)
+    # docs are built on every minor tag for the latest major (when 3.0 is out, the latest major is 3.0)
+    # (technically it'll be always the latest version)
+    #
+    # docs are built on every micro tag for the latest minor of
+    # - the latest major (when 3.0 is out, the latest major is 3.0)
+    # - the previous major (when 3.0 is out, the previous major is 2.0, the latest minor on this version being 2.8)
+    - name: Check if it's a micro tag for the latest minor
+      if: env.IS_TAG_BUILD == 'true'
+      id: check_tag
+      run: |
+        IS_LATEST_VERSION=${{ steps.rasa_sdk_get_version.outputs.is_latest_version }}
+        # the latest major (when 3.0 is out, the latest major is 3.0)
+        # build docs on push to the main branch
+        if [[ "${IS_LATEST_VERSION}" == "true" || "${IS_MASTER_BRANCH}" == "true" ]]; then
+          echo "::set-output name=build_docs::true"
+          exit 0
+        fi
+        # the previous major (when 3.0 is out, the previous major is 2.0, the latest minor on this version being 2.8)
+        CURRENT_MAJOR_VERSION=$(echo ${LATEST_TAGGED_NON_ALPHA_RASA_SDK_VERSION} | awk -F\. '{print $1}')
+        PREVIOUS_MAJOR_LATEST_VERSION=$(git tag | sort -r -V | grep -E "^[0-9.]+$" | grep -vE "^${CURRENT_MAJOR_VERSION}" | head -n1)
+        # Return 'true' if tag version is equal or higher than the latest previous major version
+        IS_PREVIOUS_MAJOR_LATEST_VERSION=$((printf '%s\n%s\n' "${PREVIOUS_MAJOR_LATEST_VERSION}" "$TAG_NAME" \
+          | sort -V -C && echo true || echo false) || true)
+        if [[ "${IS_PREVIOUS_MAJOR_LATEST_VERSION}" == "true" ]]; then
+          echo "::set-output name=build_docs::true"
+          exit 0
+        fi
+        echo "::set-output name=build_docs::false"
+
   docs:
     name: Build Docs
     runs-on: ubuntu-latest
-    if: github.repository == 'RasaHQ/rasa-sdk'  # don't run this for main branches of forks, would fail anyways
+    needs: [ evaluate_release_tag ]
+    if: github.repository == 'RasaHQ/rasa-sdk' && needs.evaluate_release_tag.outputs.build_docs == 'true'  # don't run this for main branches of forks, would fail anyways
 
     steps:
     - name: Checkout git repository 🕝
diff --git a/docs/package.json b/docs/package.json
index 64b72668c..198b1069c 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -51,7 +51,8 @@
     "remark-sources": "^1.1.0",
     "sass": "^1.26.10",
     "sass-loader": "^9.0.3",
-    "styled-components": "^4.2.0"
+    "styled-components": "^4.2.0",
+    "fs-extra": "^9.0.1"
   },
   "browserslist": {
     "production": [
diff --git a/docs/yarn.lock b/docs/yarn.lock
index 6861e79ac..de101b474 100644
--- a/docs/yarn.lock
+++ b/docs/yarn.lock
@@ -8718,7 +8718,7 @@ fs-extra@^8.1, fs-extra@^8.1.0:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
-fs-extra@^9.0:
+fs-extra@^9.0, fs-extra@^9.0.1:
   version "9.1.0"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-9.1.0.tgz#5954460c764a8da2094ba3554bf839e6b9a7c86d"
   integrity sha512-hcg3ZmepS30/7BSFqRvoo3DOMQu7IjqxO5nCDt+zM9XWjb33Wg7ziNT+Qvqbuc3+gWpzO02JubVyk2G4Zvo1OQ==
diff --git a/scripts/push_docs_to_branch.sh b/scripts/push_docs_to_branch.sh
index 7155f6317..8076ff695 100755
--- a/scripts/push_docs_to_branch.sh
+++ b/scripts/push_docs_to_branch.sh
@@ -14,15 +14,15 @@ set -Eeuo pipefail
 
 TODAY=`date "+%Y%m%d"`
 # we build new versions only for minors and majors
-PATTERN_FOR_NEW_VERSION="^refs/tags/[0-9]+\\.[0-9]+\\.0$"
-PATTERN_FOR_MICRO_VERSION="^refs/tags/[0-9]+\\.[0-9]+\\.[1-9][0-9]*$"
+PATTERN_FOR_NEW_VERSION="^refs/tags/[0-9]+\\.0\\.0$"
+PATTERN_FOR_EXISTING_VERSION="^refs/tags/[0-9]+\\.[0-9]+\\.[0-9]+$"
 MAIN_REF=refs/heads/main
 VARIABLES_JSON=docs/docs/variables.json
 SOURCES_FILES=docs/docs/sources/
 CHANGELOG=docs/docs/changelog.mdx
 
 [[ ! $GITHUB_REF =~ $PATTERN_FOR_NEW_VERSION ]] \
-&& [[ ! $GITHUB_REF =~ $PATTERN_FOR_MICRO_VERSION ]] \
+&& [[ ! $GITHUB_REF =~ $PATTERN_FOR_EXISTING_VERSION ]] \
 && [[ $GITHUB_REF != $MAIN_REF ]] \
 && echo "Not on main or tagged version, skipping." \
 && exit 0
@@ -31,10 +31,12 @@ NEW_VERSION=
 EXISTING_VERSION=
 if [[ "$GITHUB_REF" =~ $PATTERN_FOR_NEW_VERSION ]]
 then
-    NEW_VERSION=${GITHUB_REF/refs\/tags\//}
-elif [[ "$GITHUB_REF" =~ $PATTERN_FOR_MICRO_VERSION ]]
+    NEW_VERSION=$(echo $GITHUB_REF | sed -E "s/^refs\/tags\/([0-9]+)\.([0-9]+)\.0$/\1.x/")
+    if [[ -n ${CI} ]]; then echo "New version: ${NEW_VERSION}"; fi
+elif [[ "$GITHUB_REF" =~ $PATTERN_FOR_EXISTING_VERSION ]]
 then
-    EXISTING_VERSION=$(echo $GITHUB_REF | sed -E "s/^refs\/tags\/([0-9]+)\.([0-9]+)\.[0-9]+$/\1.\2.0/")
+    EXISTING_VERSION=$(echo $GITHUB_REF | sed -E "s/^refs\/tags\/([0-9]+)\.([0-9]+)\.[0-9]+$/\1.x/")
+    if [[ -n ${CI} ]]; then echo "Existing version: ${EXISTING_VERSION}"; fi
 fi
 
 # clone the $DOCS_BRANCH in a temp directory
@@ -46,6 +48,9 @@ then
     EXISTING_VERSION=$NEW_VERSION
 fi
 
+# install yarn dependencies in the temp directory
+cd $TMP_DOCS_FOLDER/docs && yarn install && cd - || exit 1
+
 if [ ! -z "$EXISTING_VERSION" ]
 then
     echo "Updating docs for existing version $EXISTING_VERSION..."
@@ -71,7 +76,7 @@ fi
 CURRENTLY_EDITING_VERSION=${EXISTING_VERSION:-$NEW_VERSION}
 if [ -n "$CURRENTLY_EDITING_VERSION" ]
 then
-    cd $TMP_DOCS_FOLDER/docs && yarn run update-versioned-sources -- $CURRENTLY_EDITING_VERSION && cd -
+    cd $TMP_DOCS_FOLDER/docs && yarn run update-versioned-sources $CURRENTLY_EDITING_VERSION && cd - || exit 1
 fi
 
 cd $TMP_DOCS_FOLDER