Migrate blog to Docusaurus

SECURITY.md

@@ -95,9 +95,9 @@ The role responsible for each step is noted at the beginning.
     mailing list.
   - **Developer**: Merge the security fix PR
   - **Developer**: Release the package and/or deploy the fix as appropriate
-  - **Developer & Coordinator**: Draft a [blog post](https://github.com/conda-forge/blog) and other
+  - **Developer & Coordinator**: Draft a [blog post](/blog) and other
     announcement texts. This can be done in parallel with the previous steps, but consider using a
-    [private advisory](https://github.com/conda-forge/blog/security/advisories) for the text.
+    [private advisory](https://github.com/conda-forge/conda-forge.github.io/security/advisories) for the text.
   - **Coordinator**: Publish the security advisory on the announcement date. If applicable, GitHub
     will post the CVE to the MITRE database.
   - **Coordinator**: Publish the blog post and other announcements (Element chat room, Twitter,

blog/2019-12-06-cfep09.md

@@ -0,0 +1,49 @@
+---
+authors:
+  - cj-wright
+tags: [autotick-bot]
+---
+
+# Automatically Deployed ABI Migrations
+
+Handling application binary interface (ABI) migrations has always been a
+hassle for Conda-Forge. Maintaining ABI consistency helps enable the
+"just use conda-forge" experience for many of our users, making
+certain that numpy's blas is the same as scipy's. As libraries update
+their code, the new versions may be ABI incompatible, as function
+signatures and other symbols may have changed, leading to the dreaded
+`SegmentationFault` and other errors.
+
+<!--truncate-->
+
+Conda-Forge handles this by having a pinning file that tracks all the
+currently supported ABIs. These pinned ABIs are then used to build the
+downstream packages, making certain that all are consistent. As new
+versions of pinned software are released the pins are updated, causing a
+migration of the pin, and the rebuilding of all packages which rely on
+the pinned package. In the past, this was handled by a change to the
+global pinnings and a subsequent migration via the auto-tick bot. While
+this worked, there were issues that this created. Firstly, this approach
+could cause unsatisfiable build dependencies for new packages, as some
+of the new package's dependencies had been compiled with the new pins,
+but not all. Secondly, migrations happened in series, if a second pin
+was moved while the first was being migrated then the migration could go
+wrong as packages which were being rebuilt for the first pin got the
+second pin before they were ready.
+
+Conda-Forge Core has recently approved CFEP-9, a migration policy to fix
+these issues. With CFEP-9 pinnings are proposed as small yaml snippets
+which contain the new pins. The auto-tick bot then starts migrating the
+packages in order, applying the yaml snippet to each package in turn. If
+a second pinning change is issued then the bot starts the migration for
+that package too, enabling the two migrations to work independently. If
+a package needs a change in both pins then the maintainers can choose
+the order in which they apply the pins by merging one pin before the
+other.
+
+This approach will yield much greater stability in migrations and will
+enable more maintainers to issue migrations. Migrations can be issued by
+putting a PR into
+[conda-forge/conda-forge-pinning-feedstock](https://github.com/conda-forge/conda-forge-pinning-feedstock),
+adding a file to the `migrations` folder, PRs into the auto-tick bot are
+not needed anymore.

blog/2020-02-04-gsoc.md

@@ -0,0 +1,112 @@
+---
+authors:
+  - ocefpaf
+tags: [autotick-bot, gsoc]
+---
+
+# Google Summer of Code 2020 improved automatic maintenance of `conda-forge`
+
+The `conda-forge` "autotick" bot is a crucial part of `conda-forge`'s
+infrastructure. It enables automatic maintenance of `conda-forge`
+packages by pushing version updates to the underlying software and
+enabling large migrations of packages from one dependency to another
+(e.g., Python 3.7 to Python 3.8). As `conda-forg` grows in size, with
+over 9,000 packages to date, automatic maintenance of the `conda-forge`
+ecosystem will become even more important.
+
+<!--truncate-->
+
+We here at `conda-forge` have a large number of potential Google Sumer
+of Code projects around maintenance and development of the autotick bot
+infrastructure. These projects are high-impact, affecting the entire
+`conda-forge` ecosystem. They also cover multiple systems including
+databases, `conda`'s CDN provider, continuous integration providers,
+and user interactions on GitHub.
+
+Want to be a part of the team? Great! Take a look at the projects below
+and get in touch with us on GitHub! You can check the [GSoC
+label](https://github.com/regro/cf-scripts/labels/GSOC) for a
+detailed listing of the issues that need work.
+
+1.  Maintenance and Refactoring
+
+    We have a large backlog of maintenance and refactoring issues that
+    are great for people with a range of experience from beginners to
+    true code ninjas.
+
+    - Integration Testing for the Autotick Bot
+
+      > Run true integration testing on a copy of the graph to better
+      > test code changes and improve our CI process.
+      >
+      > **Issue**: [regro/cf-scripts261](https://github.com/regro/cf-scripts/issues/261)
+      >
+      > **Experience Level**: advanced
+
+    - Work on the "code hardening"
+      [Milestone](https://github.com/regro/cf-scripts/milestone/4)
+
+      Address any of the issues in the milestone above related to code
+      refactoring and cleanup.
+
+      **Issues**: [regro/cf-scripts milestone #4](https://github.com/regro/cf-scripts/milestone/4)
+
+      **Experience Level**: beginner to advanced
+
+2.  Automated PRs for Globally Pinned Packages
+
+    `conda-forge` maintains a list of globally pinned packages. These
+    are typically dependencies whose version needs to be the same across
+    all of `conda-forge` (e.g., the compiler versions or packages like
+    `HDF5`). While we have infrastructure to run a migration of the
+    downstream packages from a given pinned package, we do not have
+    automated infrastructure to propose the migration of the pin itself.
+    The project here is to add this functionality to our infrastructure.
+
+    **Issue**: [regro/cf-scripts#665](https://github.com/regro/cf-scripts/issues/665)
+
+    **Experience Level**: advanced
+
+3.  Check the `conda` CDN for Updated Packages before Issuing PRs in a
+    Migration
+
+    `conda` relies on a CDN provider to serve the index of available
+    packages. There is a moderate ~30 minute delay between when a
+    package is uploaded to `anaconda.org` and when it will appear in the
+    `conda` index. We currently do not take this delay into account when
+    issuing PRs in a migration.
+
+    **Issue**: [regro/cf-scripts#595](https://github.com/regro/cf-scripts/issues/595)
+
+    **Experience Level**: beginner
+
+4.  Finish Migrations with PR into the `conda-forge` Pinnings File
+
+    Right now, when the migration of say package `ABC` to version `X`
+    from version `Y` is done, we do not automatically merge the change
+    in the globally pinned value of `ABC` into our listing of global
+    pinnings. We should be issuing a PR to the pinnings file once we
+    have determined that a suitable fraction of the packages effected by
+    a migration have been properly rebuilt.
+
+    **Issue**: [regro/cf-scripts#595](https://github.com/regro/cf-scripts/issues/595)
+
+    **Experience Level**: moderate
+
+5.  Fully Render `conda` Packages in order to Determine Migration
+    Dependencies
+
+    Determining the dependencies of a given package is actually a
+    computation expensive task due to the way `conda` recipes are
+    structured and parametrized through the use of `Jinja2` and
+    `conda-build-config.yaml` files. Currently, the autotick bot
+    examines the static metadata in the `meta.yaml` file and not the
+    fully rendered metadata. For this reason, we sometimes miss
+    dependencies of a given package that need to be migrated first.
+    Addressing this issue involves both calling the rendering process
+    and also scaling that process to the entire set of `conda-forge`
+    packages.
+
+    **Issue**: [regro/cf-scripts#664](https://github.com/regro/cf-scripts/issues/664)
+
+    **Experience Level**: moderate