Auto merge of #165148 - ubiratansoares:u/macos-free-disk-space, r=<try>

ci: increase free disk space on macos-26 jobs


try-job: test-aarch64-apple-macos-26-*

Author: bors

.github/workflows/ci.yml

@@ -121,12 +121,12 @@ jobs:
         with:
           fetch-depth: 2
 
-      # Free up disk space on Linux by removing preinstalled components that
+      # Free up disk space on Linux or macOS by removing preinstalled components that
       # we do not need. We do this to enable some of the less resource
       # intensive jobs to run on free runners, which however also have
       # less disk space.
       - name: free up disk space
-        run: src/ci/scripts/free-disk-space-linux.sh
+        run: src/ci/scripts/free-disk-space.sh
         if: matrix.free_disk
 
       # If we don't need to free up disk space then just report how much space we have

src/ci/github-actions/jobs.yml

@@ -21,6 +21,7 @@ runners:
 
   - &job-macos-26
     os: macos-26 # macOS 26 Arm64
+    free_disk: true # See https://github.com/rust-lang/infra-team/issues/307
     <<: *base-job
 
   - &job-windows

src/ci/scripts/free-disk-space-mac.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+set -euo pipefail
+# ignore-tidy-file-linelength
+
+# Free disk space on macOS GitHub action runners
+# Achieved by removing all iOS simulator instance files and runtimes
+# See https://developer.apple.com/documentation/xcode/xcode-command-line-tool-reference#Manage-the-Simulator
+
+space_before=$(df -k "$GITHUB_WORKSPACE" | awk 'NR == 2 {print $4}')
+
+xcrun simctl shutdown all
+xcrun simctl delete all
+
+# This subcommand runs asynchronously
+xcrun simctl runtime delete all
+
+# Wait a max of 60 seconds to ensure the clean-up is done before any subsequential build steps
+for ((attempt = 0; attempt < 30; attempt++)); do
+    remaining=$(xcrun simctl runtime list -j | jq 'length')
+    echo "Remaining runtime iOS simulator images : $remaining"
+
+    if [[ "$remaining" == 0 ]]; then
+        break
+    fi
+    sleep 2
+done
+
+if [[ "$remaining" != 0 ]]; then
+    echo "::warning::Runtime deletion did not finish within the polling period."
+fi
+
+# Report net increase in available disk space
+space_after=$(df -k "$GITHUB_WORKSPACE" | awk 'NR == 2 {print $4}')
+extra_space=$(awk -v b="$space_before" -v a="$space_after" 'BEGIN { printf "%.2f", (a - b) / 1048576 }')
+echo "Increase in available disk space: $extra_space GiB"

src/ci/scripts/free-disk-space.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -euo pipefail
+
+script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
+
+# dispatch according to the Github Runner
+case "${RUNNER_OS:-}" in
+    Linux)
+        exec "${script_dir}/free-disk-space-linux.sh"
+        ;;
+    macOS)
+        exec "${script_dir}/free-disk-space-mac.sh"
+        ;;
+    *)
+        echo "::error:: freeing disk space not supported for : '${RUNNER_OS:-unset}'"
+        exit 1
+        ;;
+esac