Multiple changes.

- Add build manifests for SourceHut.
  - Update README destination links.
  - Fix manifest for prerelease gem.
  - Reopen env handles when #clear is successful.
  - Fix #each when there is only one key.
  - Always use io_vec lengths when creating new strings.
  - Hook for rdoc generation.
  - Rename #open to #reopen, don't alias it.
  - Add a Rollback exception for upcoming transaction block work

FossilOrigin-Name: d6ddedc51b0ac67f395d5749aa3e6adbeebdaf2843c6402ace757b0afffc2be9

.builds/freebsd.yml

@@ -0,0 +1,26 @@
+image: freebsd/12.x
+shell: true
+packages:
+  - ruby
+sources:
+  - hg+https://hg.sr.ht/~mahlon/ruby-mdbx
+tasks:
+  - env-setup: |
+      sudo sh -c 'echo "DEFAULT_VERSIONS+=ruby=2.7" > /etc/make.conf'
+      sudo portsnap fetch extract
+      cd /usr/ports/devel/ruby-gems
+      sudo make -DBATCH install
+      cd /usr/ports/databases/mdbx
+      sudo make -DBATCH install
+  - project-setup: |
+      cd ~/ruby-mdbx
+      sudo gem install -Ng
+  - test: |
+      export LC_ALL=en_US.UTF-8
+      cd ~/ruby-mdbx
+      rake test
+triggers:
+  - action: email
+    condition: always
+    to: mahlon@martini.nu
+

.builds/ubuntu.yml

@@ -0,0 +1,29 @@
+image: ubuntu/lts
+shell: true
+packages:
+  - ruby
+  - ruby-dev
+sources:
+  - hg+https://hg.sr.ht/~mahlon/ruby-mdbx
+tasks:
+  - env-setup: |
+      git clone https://github.com/erthink/libmdbx.git
+      cd libmdbx
+      make dist
+      cd dist
+      make
+      sudo make install
+  - project-setup: |
+      cd ~/ruby-mdbx
+      sudo gem install -Ng
+  - test: |
+      sudo locale-gen en_US.UTF-8
+      sudo update-locale LANG=en_US.UTF-8
+      export LC_ALL=en_US.UTF-8
+      cd ~/ruby-mdbx
+      rake test
+triggers:
+  - action: email
+    condition: always
+    to: mahlon@martini.nu
+