chore(deps): update build-emacs-for-macos to 0.6.57

Allow the default builder_ref to be set in the a single location, the
_prepare shared workflow. Other workflows essentially have a override
option, and no longer need explicit default values set.

.github/workflows/_build.yml

@@ -13,7 +13,7 @@ on:
         type: string
       builder_ref:
         description: "Git ref to checkout of build-emacs-for-macos"
-        required: true
+        required: false
         type: string
       builder_args:
         description: Custom arguments passed to build script

.github/workflows/_prepare.yml

@@ -5,30 +5,41 @@ on:
     inputs:
       builder_ref:
         description: Git ref to checkout of build-emacs-for-macos
-        required: true
+        required: false
         type: string
+        default: ""
     outputs:
+      builder_ref:
+        description: Git ref of build-emacs-for-macos at builder_ref
+        value: ${{ jobs.builder-sha.outputs.ref }}
       builder_sha:
-        description: Git SHA of build-emacs-for-macos at builder_ref
+        description: Git commit SHA of build-emacs-for-macos at builder_ref
         value: ${{ jobs.builder-sha.outputs.sha }}
 
 jobs:
   builder-sha:
     runs-on: "macos-13"
     outputs:
-      sha: ${{ steps.builder_sha.outputs.sha }}
+      ref: ${{ steps.ref.outputs.ref }}
+      sha: ${{ steps.sha.outputs.sha }}
     steps:
+      - name: Default git ref check
+        id: ref
+        run: |
+          DEFAULT_BUILDER_REF="v0.6.57"
+          BUILDER_REF="${{ inputs.builder_ref }}"
+          echo "ref=${BUILDER_REF:-$DEFAULT_BUILDER_REF}" >> "$GITHUB_OUTPUT"
       - name: Checkout build-emacs-for-macos repo
         uses: actions/checkout@v4
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: ${{ inputs.builder_ref }}
+          ref: ${{ steps.ref.outputs.ref }}
       - name: Store builder Git SHA
-        id: builder_sha
+        id: sha
         run: |
           BUILDER_SHA="$(git rev-parse HEAD)"
           echo "$BUILDER_SHA" > build-emacs-for-macos-git-sha.txt
-          echo "sha=$BUILDER_SHA" >> $GITHUB_OUTPUT
+          echo "sha=$BUILDER_SHA" >> "$GITHUB_OUTPUT"
           echo "Builder ref ${{ inputs.builder_ref }} resolved to" \
                "commit SHA: $BUILDER_SHA"
       - name: Upload builder git SHA artifact
@@ -58,7 +69,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: ${{ inputs.builder_ref }}
+          ref: ${{ needs.builder-sha.outputs.ref }}
           fetch-depth: 0
       - name: Setup Go
         if: steps.cache.outputs.cache-hit != 'true'

.github/workflows/build.yml

@@ -11,9 +11,9 @@ on:
         description: Override Emacs git commit SHA to build
         required: false
       builder_ref:
-        description: "Git ref to checkout of build-emacs-for-macos"
-        required: true
-        default: "v0.6.52"
+        description: "Override git ref to checkout of build-emacs-for-macos"
+        required: false
+        default: ""
       builder_args:
         description: Custom arguments passed to build script
         required: false

.github/workflows/nightly-master.yml

@@ -8,20 +8,6 @@ on:
       git_sha:
         description: Override Emacs git commit SHA to build
         required: false
-      builder_ref:
-        description: "Git ref to checkout of build-emacs-for-macos"
-        required: true
-        default: "v0.6.52"
-      x86_64:
-        description: "Build x86_64 version of Emacs"
-        required: false
-        default: true
-        type: boolean
-      arm64:
-        description: "Build arm64 version of Emacs"
-        required: false
-        default: true
-        type: boolean
 
 jobs:
   build:
@@ -30,7 +16,4 @@ jobs:
     with:
       git_ref: "master"
       git_sha: ${{ inputs.git_sha }}
-      builder_ref: ${{ inputs.builder_ref }}
-      x86_64: ${{ inputs.x86_64 }}
-      arm64: ${{ inputs.arm64 }}
     secrets: inherit

README.md

@@ -26,12 +26,12 @@
 ## Features
 
 - Self-contained Emacs.app application bundle, with no external dependencies.
-- Native compilation ([gccemacs][]), only in Emacs 28.x and later builds.
-- Native JSON parsing via libjansson.
+- Native compilation ([gccemacs][]).
+- Native JSON parsing.
 - SVG rendering via librsvg.
 - Various image formats are supported via macOS native image APIs.
-- Xwidget-webkit support is enabled, allowing access to a embedded WebKit-based
-  browser with `M-x xwidget-webkit-browse-url`.
+- Xwidget-webkit support, allowing access to a embedded WebKit-based browser
+  with `M-x xwidget-webkit-browse-url`.
 - Native XML parsing via libxml2.
 - Dynamic module loading.
 - Includes the [fix-window-role][], [system-appearance][], and
@@ -56,11 +56,13 @@
 
 ## System Requirements
 
-- macOS 13 Ventura or later for Apple Silicon builds.
-- macOS 12 Monterey or later for Intel builds, which can run on Apple Silicon
-  via Rosetta2.
+- Builds produced after 2024-11-30:
+  - macOS 11 or later.
+- Builds produced before 2024-11-30:
+  - macOS 13 Ventura or later for Apple Silicon builds.
+  - macOS 12 Monterey or later for Intel builds.
 - Xcode Command Line Tools to use native compilation in Emacs, available since
-  28.x.
+  Emacs 28.x builds.
 
 ## Installation
 
@@ -114,25 +116,8 @@ for at least a day or two without any obvious issues.
 
 ## Apple Silicon
 
-Native builds for Apple Silicon is supported, but currently GitHub's M1-based
-Actions Runners are prohibitively expensive for nightly builds. Intel builds
-though do work on Apple Silicon machines via Rosetta2, with a minor performance
-impact.
-
-Due to the costs, Apple Silicon builds are for now only scheduled for the 1st of
-each month. The `emacs-app-monthly` Homebrew Cask will always be pointing at a
-release that includes Intel and Apple Silicon builds.
-
-Builds for stable releases of Emacs will also include both Intel and Apple
-Silicon builds.
-
-### Costs
-
-At time of writing (2023-11-21), an average Apple Silicon build uses around 17
-minutes of billable time, at a cost of $0.16 USD per minute, that comes out to
-around $2.72 per build. I am considering enabling sponsorship on this repository
-in an effort to cover the costs for more frequent Apple Silicon builds, and will
-update here if/when I have any news.
+As of 2024-11-30, all builds include both Apple Silicon (arm64) and Intel
+(x86_64) artifacts.
 
 ## Use Emacs.app as `emacs` CLI Tool
 
@@ -173,13 +158,11 @@ use the alias from the above example.
 ## Build Process
 
 Building Emacs is done using the [jimeh/build-emacs-for-macos][] build script,
-executed within a GitHub Actions [workflow][]. This is why macOS 11.x (Big Sur)
-or later is required, as it's the oldest version of macOS available in GitHub
-Actions.
+executed within a GitHub Actions [workflow][].
 
 [jimeh/build-emacs-for-macos]: https://github.com/jimeh/build-emacs-for-macos
 [workflow]:
-  https://github.com/jimeh/emacs-builds/blob/main/.github/workflows/build.yml
+  https://github.com/jimeh/emacs-builds/blob/main/.github/workflows/nightly-master.yml
 
 Full history for all builds is available on GitHub Actions [here][actions].
 Build logs are only retained by GitHub for 90 days though.
@@ -219,6 +202,19 @@ Please see [Issues][] for details of things to come, or to report issues.
 
 ## News / Recent Changes
 
+### 2024-12-01 — Apple Silicon builds all the time, more stability via Nix
+
+GitHub's standard runner for macOS 14 and later runs on Apple Silicon, and are
+free to use for public repositories. As such we now use `runs-on: macos-13` for
+Intel builds, and `runs-on: macos-14` for Apple Silicon builds. And we do so on
+all builds, nightlies, pretests, and stable.
+
+Additionally, macOS 11 Big Sur is now the minimum required version again, for
+both Intel and Apple Silicon builds. This is due to switching from Homebrew to
+Nix for managing build-time dependencies. And it supports easily switching
+between different macOS SDK versions, meaning we can target an SDK that is older
+than the OS we are creating the builds on.
+
 ### 2023-11-22 — Apple Silicon builds, drop macOS 11 support
 
 Apple Silicon builds are now available, but limited to stable releases, and