From 57bcedf8e07b0ccd1ad2cb50bb6aab6539f0ea5c Mon Sep 17 00:00:00 2001
From: Yvan Sraka <yvan@sraka.xyz>
Date: Mon, 13 Mar 2023 22:35:43 +0100
Subject: [PATCH] Use GitHub Pages to serve statically the bootstrap shell

curl https://input-output-hk.github.io/devx | sh
---
 .github/workflows/gh-pages.yml | 43 ++++++++++++++++++++++
 gh-pages/bootstrap.sh          | 65 ++++++++++++++++++++++++++++++++++
 gh-pages/index.html            |  1 +
 3 files changed, 109 insertions(+)
 create mode 100644 .github/workflows/gh-pages.yml
 create mode 100644 gh-pages/bootstrap.sh
 create mode 120000 gh-pages/index.html

diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
new file mode 100644
index 00000000..d676ff29
--- /dev/null
+++ b/.github/workflows/gh-pages.yml
@@ -0,0 +1,43 @@
+# Simple workflow for deploying static content to GitHub Pages
+name: Deploy static content to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  # FIXME: disabled while working on it ...
+  # push:
+  #  branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow one concurrent deployment
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Pages
+        uses: actions/configure-pages@v3
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          # Upload entire repository
+          path: './gh-pages'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1
diff --git a/gh-pages/bootstrap.sh b/gh-pages/bootstrap.sh
new file mode 100644
index 00000000..2c5a4468
--- /dev/null
+++ b/gh-pages/bootstrap.sh
@@ -0,0 +1,65 @@
+#! /bin/bash
+set -euo pipefail
+
+# End-user DevX could also be potentially improved through this script: e.g,
+# by helping new users to set up Nix using Determinate Systems new installer,
+# or detect that it's used in a GA context and advise installing Nix with Cachix install Nix action.
+
+# TODO: you can give it a try with ...
+# curl --proto '=https' --tlsv1.2 -sSf -L https://yvan-sraka.github.io/devx/ | sh -s -- ghc8107-static-minimal
+
+if ! command -v nix >/dev/null 2>&1; then
+  echo "This script requires nix to be installed; you don't appear to have nix available ..."
+  if [ "$GITHUB_ACTIONS" == "true" ]; then
+    echo "... and it seems that you run it inside a GitHub Action!
+
+You can setup Nix using https://github.com/cachix/install-nix-action, e.g.:
+
+  - name: Install Nix with good defaults
+    uses: cachix/install-nix-action
+    with:
+      extra_nix_config: |
+        trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
+        substituters = https://cache.iog.io/ https://cache.nixos.org/"
+    # TODO: explain how to use the shell with something better than:
+    #
+    # - name: Add devx-shell
+    #   run: |
+    #     echo $PATH
+    #     cat <<EOF > /usr/local/bin/devx-shell
+    #     #!/bin/bash
+    #     nix develop github:input-output-hk/devx#ghc8107-static-minimal \
+    #       --command /usr/bin/bash <(echo 'eval "\$shellHook\"'; cat "$1")
+    #     EOF
+    #     chmod +x /usr/local/bin/devx-shell
+    # - name: Build
+    #   shell: devx-shell {0}
+    #   run: |
+    #     cabal update
+    #     cabal build
+    exit 1
+  else
+    echo "... we can run https://github.com/DeterminateSystems/nix-installer for you!"
+    echo "Do you want to install nix now? (y/n)"
+    read -r answer
+    case "$answer" in
+      y|Y)
+        curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install
+        ;;
+      *)
+        echo "Feel free to install (or not) nix your way :)"
+        exit 1
+        ;;
+    esac
+  fi
+fi
+# TODO: figure out the best way of doing ...
+#
+# if [[ -e /nix/store/...path-to-rc file ]]; then
+#   <launch directly>
+# else
+#   curl + import + launch
+# fi
+#
+# ... rather than?
+nix develop "github:yvan-sraka/static-closure#$1" --impure --no-write-lock-file --refresh --accept-flake-config
diff --git a/gh-pages/index.html b/gh-pages/index.html
new file mode 120000
index 00000000..eba53897
--- /dev/null
+++ b/gh-pages/index.html
@@ -0,0 +1 @@
+bootstrap.sh
\ No newline at end of file