feat(.travis.yml): deploy nightly builds to Github Pages

.travis.yml

@@ -123,7 +123,8 @@ script:
           ../src || exit
   - make -j2 || exit
   - if [[ $TEST != OFF ]]; then yes "A" | ctest -j2 --output-on-failure; fi
-  - if [[ $UPLOAD == ON ]]; then cpack; make package; fi
+  - if [[ $UPLOAD == ON ]]; then cpack; fi
+  - if [[ $UPLOAD == ON && $GH_TOKEN && $TRAVIS_PULL_REQUEST == false && $TRAVIS_BRANCH == master ]]; then bash script/deploy_gh_pages.sh; fi
   - if [[ $TEST_LEANPKG_REGISTRY == ON ]]; then ../script/test_registry.py; fi
   - cd ..
 
@@ -139,12 +140,11 @@ notifications:
 
 deploy:
   provider: releases
-  api_key:
-    secure: NeTKs0tb0hM9yC1lJyc7Y8ev1rfEe9tpY8bS20hUivNKcX8S0HjJh/xtx/3LgrhcqVP0xKuDPE0YNQk3E9SO1ni2ESjIFIVXI/hpDLNjxjfaeW7rcpYcc7dy7ynEP23HnAOMr4PMHs0T/ATsJHKyDXTUi4yrQToBBTQUFvCKgo8=
+  api_key: $GH_TOKEN
   file: $TARGET
   skip_cleanup: true
   overwrite: true
   on:
-    condition: $UPLOAD = ON
+    condition: $UPLOAD = ON && $GH_TOKEN
     repo: leanprover/lean
     tags: true

.travis.yml.in

@@ -123,7 +123,8 @@ script:
           ../src || exit
   - make -j2 || exit
   - if [[ $TEST != OFF ]]; then yes "A" | ctest -j2 --output-on-failure; fi
-  - if [[ $UPLOAD == ON ]]; then cpack; make package; fi
+  - if [[ $UPLOAD == ON ]]; then cpack; fi
+  - if [[ $UPLOAD == ON && $GH_TOKEN && $TRAVIS_PULL_REQUEST == false && $TRAVIS_BRANCH == master ]]; then bash script/deploy_gh_pages.sh; fi
   - if [[ $TEST_LEANPKG_REGISTRY == ON ]]; then ../script/test_registry.py; fi
   - cd ..
 
@@ -139,12 +140,11 @@ notifications:
 
 deploy:
   provider: releases
-  api_key:
-    secure: NeTKs0tb0hM9yC1lJyc7Y8ev1rfEe9tpY8bS20hUivNKcX8S0HjJh/xtx/3LgrhcqVP0xKuDPE0YNQk3E9SO1ni2ESjIFIVXI/hpDLNjxjfaeW7rcpYcc7dy7ynEP23HnAOMr4PMHs0T/ATsJHKyDXTUi4yrQToBBTQUFvCKgo8=
+  api_key: $GH_TOKEN
   file: $TARGET
   skip_cleanup: true
   overwrite: true
   on:
-    condition: $UPLOAD = ON
+    condition: $UPLOAD = ON && $GH_TOKEN
     repo: leanprover/lean
     tags: true

script/deploy_gh_pages.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# inspired by https://github.com/steveklabnik/automatically_update_github_pages_with_travis_example
+
+set -eu
+
+rev=$(git rev-parse --short HEAD)
+
+
+git clone -b gh-pages "https://$GH_TOKEN@github.com/$TRAVIS_REPO_SLUG.git" gh-pages
+cd gh-pages
+
+# "build/lean-3.2.0-linux.tar.gz" ~> "build/lean-nightly-linux.tar.gz"
+NIGHTLY_TARGET=${TARGET/-*-/-nightly-}
+mkdir -p build
+ln ../$TARGET $NIGHTLY_TARGET
+
+git config user.name "Bot Botson"
+git config user.email "bot@bot.bot"
+
+git add -A .
+git commit -am "nightly build at ${rev}"
+git push -fq