[Infra] Limit concurrent matrix jobs in 'spm' jobs

.github/workflows/abtesting.yml

@@ -50,6 +50,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/appdistribution.yml

@@ -46,6 +46,7 @@ jobs:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
 
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14, macos-13]
         include:

.github/workflows/auth.yml

@@ -103,6 +103,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/core.yml

@@ -43,6 +43,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/core_internal.yml

@@ -39,6 +39,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/crashlytics.yml

@@ -57,6 +57,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/database.yml

@@ -68,6 +68,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/dynamiclinks.yml

@@ -43,6 +43,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14, macos-13]
         include:

.github/workflows/firebase_app_check.yml

@@ -100,6 +100,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-14, macos-13]

.github/workflows/functions.yml

@@ -56,6 +56,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14]
         include:

.github/workflows/inappmessaging.yml

@@ -70,6 +70,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14, macos-13]
         include:

.github/workflows/installations.yml

@@ -61,6 +61,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         # TODO: macos tests are blocked by https://github.com/erikdoe/ocmock/pull/532
         target: [iOS, tvOS, macOS, watchOS, catalyst]

.github/workflows/messaging.yml

@@ -82,6 +82,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, watchOS, tvOS, macOS, catalyst]
         os: [macos-13, macos-14]

.github/workflows/mlmodeldownloader.yml

@@ -73,6 +73,7 @@ jobs:
   spm:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/performance.yml

@@ -127,6 +127,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS]
         include:

.github/workflows/remoteconfig.yml

@@ -58,6 +58,7 @@ jobs:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
 
     strategy:
+      max-parallel: 1
       matrix:
         # TODO: macos tests are blocked by https://github.com/erikdoe/ocmock/pull/532
         target: [ios, tvos, macos --skip-tests, watchos]

.github/workflows/sessions.yml

@@ -53,6 +53,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/shared-swift.yml

@@ -45,6 +45,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/storage.yml

@@ -63,6 +63,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/vertexai.yml

@@ -17,6 +17,7 @@ concurrency:
 jobs:
   spm-unit:
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, macOS, catalyst, tvOS, visionOS, watchOS]
         os: [macos-14]
@@ -44,6 +45,7 @@ jobs:
 
   spm-integration:
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS]
         os: [macos-14]