Autogenerate template for scripts v0.2.1

```bash
# Pull in the latest scripts
curl -s https://raw.githubusercontent.com/rancher/charts-build-scripts/master/init.sh > /dev/null | BRANCH_ROLE=live sh
# Change the helm repo name back to partner-charts.rancher.io
yq eval -i '.helmRepo.cname = "partner-charts.rancher.io"' configuration.yaml
# Use the latest version of the scripts
sed -i'.bak' "s/CHARTS_BUILD_SCRIPT_VERSION=.*/CHARTS_BUILD_SCRIPT_VERSION=v0.2.1/" scripts/version; rm scripts/version.bak
# Pull in the latest docs
make template
```

.gitignore

@@ -0,0 +1,3 @@
+bin
+*.DS_Store
+.idea

Makefile

@@ -0,0 +1,10 @@
+pull-scripts:
+	./scripts/pull-scripts
+
+TARGETS := prepare patch charts clean validate template
+
+$(TARGETS):
+	@./scripts/pull-scripts
+	@./bin/charts-build-scripts $@
+
+.PHONY: $(TARGETS)

README.md

@@ -1,3 +1,89 @@
-# Asset Branch
+## Live Branch
 
-This branch is auto-generated from main-source branch, please open PRs to main-source.
+This branch contains generated assets that have been officially released on partner-charts.rancher.io.
+
+The following directory structure is expected:
+```text
+assets/
+  <package>/
+    <chart>-<packageVersion>.tgz
+  ...
+charts/
+  <package>
+    <chart>
+      <packageVersion>
+        # Unarchived Helm chart
+```
+
+### Configuration
+
+This repository branch contains a `configuration.yaml` file that is used to specify how it interacts with other repository branches.
+
+### Cutting a Release
+
+In the Live branch, cutting a release requires you to copy the contents of the Staging branch into your Live Branch, which can be done with the following simple Bash script.
+
+```bash
+# Assuming that your upstream remote (e.g. https://github.com/rancher/charts.git) is named `upstream` 
+# Replace the following environment variables
+STAGING_BRANCH=dev-v2.x
+LIVE_BRANCH=release-v2.x
+FORKED_BRANCH=release-v2.x.y
+git fetch upstream
+git checkout upstream/${LIVE_BRANCH} -b ${FORKED_BRANCH}
+git branch -u origin/${FORKED_BRANCH}
+git checkout upstream/${STAGING_BRANCH} -- charts assets index.yaml
+git add charts assets index.yaml
+git commit -m "Releasing chart"
+git push --set-upstream origin ${FORKED_BRANCH}
+# Create your pull request!
+```
+
+Once complete, you should see the following:
+- The `assets/` and `charts/` directories have been updated to match the Staging branch. All entires should be additions, not modifications.
+- The `index.yaml`'s diff shows only adds additional entries and does not modify or remove existing ones.
+
+No other changes are expected.
+
+### Cutting an Out-Of-Band Chart Release
+
+Similar to the above steps, cutting an out-of-band chart release will involve porting over the new chart from the Staging branch via `git checkout`. However, you will need to manually regenerate the Helm index since you only want the index.yaml on the Live branch to be updated to include the single new chart.
+
+Use the following example Bash script to execute this change:
+
+```bash
+# Assuming that your upstream remote (e.g. https://github.com/rancher/charts.git) is named `upstream` 
+# Replace the following environment variables
+STAGING_BRANCH=dev-v2.x
+LIVE_BRANCH=release-v2.x
+FORKED_BRANCH=release-v2.x.y
+NEW_CHART_DIR=charts/rancher-monitoring/rancher-monitoring/X.Y.Z
+NEW_ASSET_TGZ=assets/rancher-monitoring/rancher-monitoring-X.Y.Z.tgz
+git fetch upstream
+git checkout upstream/${LIVE_BRANCH} -b ${FORKED_BRANCH}
+git branch -u origin/${FORKED_BRANCH}
+git checkout upstream/${STAGING_BRANCH} -- ${NEW_CHART_DIR} ${NEW_ASSET_TGZ}
+helm repo index --merge ./index.yaml --url assets assets; # FYI: This will generate new 'created' timestamps across *all charts*.
+mv assets/index.yaml index.yaml
+git add ${NEW_CHART_DIR} ${NEW_ASSET_TGZ} index.yaml
+git commit -m "Releasing out-of-band chart"
+git push --set-upstream origin ${FORKED_BRANCH}
+# Create your pull request!
+```
+
+Once complete, you should see the following:
+- The new chart should exist in `assets` and `charts`. Existing charts should not be modified.
+- The `index.yaml`'s diff should show an additional entry for your new chart.
+- The `index.yaml`'s diff should show modified `created` timestamps across all charts (due to the behavior of `helm repo index`).
+
+No other changes are expected.
+
+### Makefile
+
+#### Basic Commands
+
+`make pull-scripts`: Pulls in the version of the `charts-build-scripts` indicated in scripts.
+
+`make validate`: Validates your current repository branch against all the repository branches indicated in your configuration.yaml
+
+`make template`: Updates the current directory by applying the configuration.yaml on [upstream Go templates](https://github.com/rancher/charts-build-scripts/tree/master/templates/template) to pull in the most up-to-date docs, scripts, etc. from [rancher/charts-build-scripts](https://github.com/rancher/charts-build-scripts)

_config.yml

@@ -1 +1 @@
-exclude: [charts]
+exclude: [charts]

assets/README.md

@@ -0,0 +1,3 @@
+## Assets
+
+This folder contains Helm chart archives that are served from partner-charts.rancher.io.

charts/README.md

@@ -0,0 +1,3 @@
+## Charts
+
+This folder contains unarchived Helm charts that are served from partner-charts.rancher.io.

configuration.yaml

@@ -0,0 +1,3 @@
+template: live
+helmRepo:
+  cname: partner-charts.rancher.io

scripts/pull-scripts

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+
+cd $(dirname $0)
+
+source ./version
+
+if ls ../bin/charts-build-scripts 1>/dev/null 2>/dev/null; then
+    CURRENT_SCRIPT_VERSION=$(../bin/charts-build-scripts --version | cut -d' ' -f3)
+    if [[ "${CURRENT_SCRIPT_VERSION}" == "${CHARTS_BUILD_SCRIPT_VERSION}" ]]; then
+        exit 0
+    fi
+fi
+
+echo "Pulling in charts-build-scripts version ${CHARTS_BUILD_SCRIPTS_REPO}@${CHARTS_BUILD_SCRIPT_VERSION}"
+
+rm -rf ../bin
+cd ..
+
+mkdir -p bin
+ARCH=$(go version | cut -d' ' -f4 | cut -d'/' -f1)
+if [[ ${ARCH} == "linux" ]]; then
+    BINARY_NAME=charts-build-scripts
+else
+    BINARY_NAME=charts-build-scripts-${ARCH}
+fi
+curl -s -L ${CHARTS_BUILD_SCRIPTS_REPO%.git}/releases/download/${CHARTS_BUILD_SCRIPT_VERSION}/${BINARY_NAME} --output bin/charts-build-scripts
+if ! [[ -f bin/charts-build-scripts ]] || [[ $(cat bin/charts-build-scripts) == "Not Found" ]]; then 
+    rm bin/charts-build-scripts; 
+    
+    # Fall back to old process
+    echo "Building binary locally..."
+    rm -rf charts-build-scripts
+    git clone --depth 1 --branch $CHARTS_BUILD_SCRIPT_VERSION $CHARTS_BUILD_SCRIPTS_REPO 2>/dev/null
+
+    cd charts-build-scripts
+    ./scripts/build
+    mv bin ..
+    cd ..
+    rm -rf charts-build-scripts
+else
+    echo "${BINARY_NAME} => ./bin/charts-build-scripts"
+fi
+
+chmod +x ./bin/charts-build-scripts
+./bin/charts-build-scripts --version

scripts/regenerate-assets

@@ -0,0 +1,74 @@
+#!/bin/bash
+set -e
+
+# Note: These scripts are only intended to migrate from the original build scripts to charts-build-scripts v0.1.x
+# A separate migration process is required for v0.2.x
+
+cd $(dirname $0)
+
+if [[ -z ${BRANCH} ]]; then
+    branch=$(git rev-parse --abbrev-ref HEAD)
+else
+    echo "Using branch ${BRANCH}"
+    branch=${BRANCH}
+fi
+
+if [[ -z ${REPOSITORY} ]]; then
+    echo "Need to provide REPOSITORY as environment variable"
+    exit 1
+fi
+
+cd ..
+
+# Setup
+rm -rf ./repository
+mkdir -p ./repository
+cd repository
+
+# Pull in branch
+echo "Pulling in ${REPOSITORY}@${branch}"
+git clone --depth 1 --branch ${branch} ${REPOSITORY} . > /dev/null 2>&1
+
+if ! (test -d assets && test -d charts); then
+    echo "There are no charts or assets in this repository"
+    cd ..
+    rm -rf ./repository
+    exit 1
+fi
+
+# Copy assets and charts into the new format
+for package_assets in assets/*; do
+    cp -R ${package_assets} ../assets
+    package_name=$(basename -- ${package_assets})
+    for asset in ${package_assets}/*; do
+        if [[ ${asset} =~ .*\.tgz ]]; then
+            # Parse structure
+            asset_name=$(basename -- ${asset%.*})
+            chart_name=$(echo ${asset_name} | rev | cut -d- -f2- | rev)
+            chart_name=$(echo ${chart_name} | sed -r 's/-[[:digit:]\.]+$//')
+            chart_version=${asset_name#${chart_name}-}
+            
+            # Fix chart version for rc version
+            # e.g. 0.0.0-rc100 -> 0.0.000-rc1 to keep the drop release candidate version logic simple
+            if [[ ${chart_version} =~ [0-9]{2}$ ]] && [[ ${chart_version} =~ -rc ]]; then
+                actual_version=${chart_version%-*}
+                package_version=${chart_version: -2}
+                chart_version_without_package_version=${chart_version%${package_version}}
+                rc_version=${chart_version_without_package_version#${actual_version}}
+                chart_version=${actual_version}${package_version}${rc_version}
+            fi
+
+            # Dump archives as charts
+            chart_path=../charts/${package_name}/${chart_name}/${chart_version}
+            echo "Unarchiving ${asset} to ${chart_path}"
+            mkdir -p ${chart_path}
+            tar xvzf ${asset} -C ${chart_path} --strip-components=1 > /dev/null 2>&1
+        fi
+    done
+done
+
+# Go back
+cd ..
+helm repo index --merge ./assets/index.yaml --url assets assets
+mv ./assets/index.yaml ./index.yaml
+rm -rf ./repository

scripts/version

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+CHARTS_BUILD_SCRIPTS_REPO=https://github.com/rancher/charts-build-scripts.git
+CHARTS_BUILD_SCRIPT_VERSION=v0.2.1