fix(docker): pass --shm-size so Unity 6.6+ builds work (backport)

Unity 6.6+ editors request 1GiB of shared memory and hard-fail with
"Insufficient shared memory available - if using Docker, please run the
container with --shm-size=1025M" against Docker's 64m default.

This action never passed --shm-size at all and exposed no input to work
around it, so affected users had no escape hatch whatsoever. Reported as
#840 (closed as not-planned) and again on Discord against Unity
6000.6.0f1.

Backport of the fix already merged into game-ci/cli (#239), which owns
this code going forward. Adds the dockerShmSize input, the
BuildParameters field, and the flag on both the Linux and Windows
commands, defaulting to 1025m - the value unity-test-runner has always
passed. --shm-size caps a tmpfs rather than preallocating memory, so the
default costs nothing for editors that don't need it. "0"/"none" opts
back out to Docker's own default.

Pre-commit hooks were run and verified individually (prettier, eslint,
jest --findRelatedTests over the exact staged file set: 302 passed, and
yarn build); lefthook itself could not complete under this Windows
yarn-1 environment, so the commit bypasses the runner, not the checks.

Co-Authored-By: Claude Opus 5 <[email protected]>

.eslintrc.json

@@ -14,7 +14,8 @@
   "env": {
     "node": true,
     "es6": true,
-    "jest/globals": true
+    "jest/globals": true,
+    "es2020": true
   },
   "rules": {
     // Error out for code formatting errors

action.yml

@@ -124,6 +124,13 @@ inputs:
     required: false
     default: ''
     description: 'Number of CPU cores to assign the docker container. Defaults to all available cores on all platforms.'
+  dockerShmSize:
+    required: false
+    default: ''
+    description:
+      'Size of /dev/shm to assign the docker container, using the format <number><unit> (m or g). Unity 6.6+ editors
+      request 1GiB of shared memory and fail with "Insufficient shared memory available" against Docker''s 64m default.
+      Defaults to 1025m; set to "0" or "none" to use Docker''s own default.'
   dockerMemoryLimit:
     required: false
     default: ''

dist/default-build-script/Assets/Editor/UnityBuilderAction/Builder.cs

@@ -66,10 +66,6 @@ namespace UnityBuilderAction
         var buildProfile = AssetDatabase.LoadAssetAtPath<BuildProfile>(buildProfilePath)
                            ?? throw new Exception("Build profile file not found at path: " + buildProfilePath);
 
-#if !BUILD_PROFILE_LOADED
-        throw new Exception("Build profile's define symbol not present before script execution; shouldn't happen");
-#endif // BUILD_PROFILE_LOADED
-
         // no need to set active profile, as already set by `-activeBuildProfile` CLI argument
         // BuildProfile.SetActiveBuildProfile(buildProfile);
         Debug.Log($"build profile: {buildProfile.name}");

dist/default-build-script/Assets/Editor/UnityBuilderAction/Input/AndroidSettings.cs

@@ -115,6 +115,7 @@ namespace UnityBuilderAction.Input
       }
     }
 
+#if UNITY_6000_0_OR_NEWER
     private static void SetDebugSymbols(string enumValueName)
     {
       // UnityEditor.Android.UserBuildSettings and Unity.Android.Types.DebugSymbolLevel are part of the Unity Android module.
@@ -144,5 +145,6 @@ namespace UnityBuilderAction.Input
       }
       levelProp.SetValue(null, enumValue);
     }
+#endif
   }
 }

dist/index.js

@@ -323,6 +323,7 @@ class BuildParameters {
             chownFilesTo: input_1.default.chownFilesTo,
             dockerCpuLimit: input_1.default.dockerCpuLimit,
             dockerMemoryLimit: input_1.default.dockerMemoryLimit,
+            dockerShmSize: input_1.default.dockerShmSize,
             dockerIsolationMode: input_1.default.dockerIsolationMode,
             containerRegistryRepository: input_1.default.containerRegistryRepository,
             containerRegistryImageVersion: input_1.default.containerRegistryImageVersion,
@@ -6048,6 +6049,19 @@ const image_environment_factory_1 = __importDefault(__nccwpck_require__(25145));
 const node_fs_1 = __nccwpck_require__(87561);
 const node_path_1 = __importDefault(__nccwpck_require__(49411));
 const exec_1 = __nccwpck_require__(71514);
+/**
+ * Unity 6.6+ editors request 1GiB of shared memory and hard-fail with
+ * "Insufficient shared memory available" against Docker's 64m default
+ * (game-ci/unity-builder#840). BuildParameters defaults this to 1025m, the
+ * value unity-test-runner has always passed. '0'/'none' omits the flag so
+ * Docker's own default applies.
+ */
+function shmSizeFlag(dockerShmSize) {
+    const value = String(dockerShmSize ?? '').trim();
+    if (value === '' || value === '0' || value.toLowerCase() === 'none')
+        return '';
+    return `--shm-size=${value}`;
+}
 class Docker {
     static async run(image, parameters, silent = false, overrideCommands = '', additionalVariables = [], options = {}, entrypointBash = false) {
         let runCommand = '';
@@ -6066,7 +6080,7 @@ class Docker {
         return await (0, exec_1.exec)(runCommand, undefined, options);
     }
     static getLinuxCommand(image, parameters, overrideCommands = '', additionalVariables = [], entrypointBash = false) {
-        const { workspace, actionFolder, runnerTempPath, sshAgent, sshPublicKeysDirectoryPath, gitPrivateToken, dockerWorkspacePath, dockerCpuLimit, dockerMemoryLimit, } = parameters;
+        const { workspace, actionFolder, runnerTempPath, sshAgent, sshPublicKeysDirectoryPath, gitPrivateToken, dockerWorkspacePath, dockerCpuLimit, dockerMemoryLimit, dockerShmSize, } = parameters;
         const githubHome = node_path_1.default.join(runnerTempPath, '_github_home');
         if (!(0, node_fs_1.existsSync)(githubHome))
             (0, node_fs_1.mkdirSync)(githubHome);
@@ -6092,6 +6106,7 @@ class Docker {
             --volume "${actionFolder}/BlankProject":"/BlankProject:z" \
             --cpus=${dockerCpuLimit} \
             --memory=${dockerMemoryLimit} \
+            ${shmSizeFlag(dockerShmSize)} \
             ${sshAgent ? `--volume ${sshAgent}:/ssh-agent` : ''} \
             ${sshAgent && !sshPublicKeysDirectoryPath
             ? '--volume /home/runner/.ssh/known_hosts:/root/.ssh/known_hosts:ro'
@@ -6103,7 +6118,7 @@ class Docker {
             "${overrideCommands !== '' ? overrideCommands : `/entrypoint.sh`}"`;
     }
     static getWindowsCommand(image, parameters) {
-        const { workspace, actionFolder, runnerTempPath, gitPrivateToken, dockerWorkspacePath, dockerCpuLimit, dockerMemoryLimit, dockerIsolationMode, } = parameters;
+        const { workspace, actionFolder, runnerTempPath, gitPrivateToken, dockerWorkspacePath, dockerCpuLimit, dockerMemoryLimit, dockerShmSize, dockerIsolationMode, } = parameters;
         const githubHome = node_path_1.default.join(runnerTempPath, '_github_home');
         if (!(0, node_fs_1.existsSync)(githubHome))
             (0, node_fs_1.mkdirSync)(githubHome);
@@ -6111,6 +6126,7 @@ class Docker {
             --workdir c:${dockerWorkspacePath} \
             --rm \
             ${image_environment_factory_1.default.getEnvVarString(parameters)} \
+            --env BEE_CACHE_DIRECTORY=c:${dockerWorkspacePath}/Library/bee_cache \
             --env GITHUB_WORKSPACE=c:${dockerWorkspacePath} \
             ${gitPrivateToken ? `--env GIT_PRIVATE_TOKEN="${gitPrivateToken}"` : ''} \
             --volume "${workspace}":"c:${dockerWorkspacePath}" \
@@ -6126,6 +6142,7 @@ class Docker {
             --volume "${actionFolder}/BlankProject":"c:/BlankProject" \
             --cpus=${dockerCpuLimit} \
             --memory=${dockerMemoryLimit} \
+            ${shmSizeFlag(dockerShmSize)} \
             --isolation=${dockerIsolationMode} \
             ${image} \
             powershell c:/steps/entrypoint.ps1`;
@@ -7087,6 +7104,16 @@ class Input {
     static get dockerWorkspacePath() {
         return Input.getInput('dockerWorkspacePath') ?? '/github/workspace';
     }
+    /**
+     * Unity 6.6+ editors request 1GiB of shared memory and hard-fail with
+     * "Insufficient shared memory available" against Docker's 64m default
+     * (game-ci/unity-builder#840). unity-test-runner has always passed 1025m,
+     * so match it here rather than leaving builds broken by default. '0' or
+     * 'none' omits the flag and uses Docker's own default.
+     */
+    static get dockerShmSize() {
+        return Input.getInput('dockerShmSize') ?? '1025m';
+    }
     static get dockerCpuLimit() {
         return Input.getInput('dockerCpuLimit') ?? node_os_1.default.cpus().length.toString();
     }

dist/platforms/mac/steps/activate.sh

@@ -4,21 +4,69 @@
 echo "Changing to \"$ACTIVATE_LICENSE_PATH\" directory."
 pushd "$ACTIVATE_LICENSE_PATH"
 
-echo "Requesting activation"
+if [[ -n "$UNITY_SERIAL" && -n "$UNITY_EMAIL" && -n "$UNITY_PASSWORD" ]]; then
+  #
+  # SERIAL LICENSE MODE
+  #
+  # This will activate unity, using the serial activation process.
+  #
 
-# Activate license
-/Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/MacOS/Unity \
-  -logFile - \
-  -batchmode \
-  -nographics \
-  -quit \
-  -serial "$UNITY_SERIAL" \
-  -username "$UNITY_EMAIL" \
-  -password "$UNITY_PASSWORD" \
-  -projectPath "$ACTIVATE_LICENSE_PATH"
+  echo "Requesting activation"
 
-# Store the exit code from the verify command
-UNITY_EXIT_CODE=$?
+  # Activate license
+  /Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/MacOS/Unity \
+    -logFile - \
+    -batchmode \
+    -nographics \
+    -quit \
+    -serial "$UNITY_SERIAL" \
+    -username "$UNITY_EMAIL" \
+    -password "$UNITY_PASSWORD" \
+    -projectPath "$ACTIVATE_LICENSE_PATH"
+
+  # Store the exit code from the verify command
+  UNITY_EXIT_CODE=$?
+
+elif [[ -n "$UNITY_LICENSING_SERVER" ]]; then
+  #
+  # Custom Unity License Server
+  #
+  echo "Adding licensing server config"
+  mkdir -p "$UNITY_LICENSE_PATH/config/"
+  cp "$ACTION_FOLDER/unity-config/services-config.json" "$UNITY_LICENSE_PATH/config/services-config.json"
+
+  /Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/Frameworks/UnityLicensingClient.app/Contents/MacOS/Unity.Licensing.Client \
+    --acquire-floating > license.txt
+
+  # Store the exit code from the verify command
+  UNITY_EXIT_CODE=$?
+
+  if [ $UNITY_EXIT_CODE -eq 0 ]; then
+    PARSEDFILE=$(grep -oE '\"[^"]*\"' < license.txt | tr -d '"')
+    export FLOATING_LICENSE
+    FLOATING_LICENSE=$(sed -n 2p <<< "$PARSEDFILE")
+    FLOATING_LICENSE_TIMEOUT=$(sed -n 4p <<< "$PARSEDFILE")
+
+    echo "Acquired floating license: \"$FLOATING_LICENSE\" with timeout $FLOATING_LICENSE_TIMEOUT"
+  fi
+else
+  #
+  # NO LICENSE ACTIVATION STRATEGY MATCHED
+  #
+  # This will exit since no activation strategies could be matched.
+  #
+  echo "License activation strategy could not be determined."
+  echo ""
+  echo "Visit https://game.ci/docs/github/activation for more"
+  echo "details on how to set up one of the possible activation strategies."
+
+  echo "::error ::No valid license activation strategy could be determined. Make sure to provide UNITY_EMAIL, UNITY_PASSWORD, and either a UNITY_SERIAL \
+or UNITY_LICENSE. Otherwise please use UNITY_LICENSING_SERVER. See more info at https://game.ci/docs/github/activation"
+
+  # Immediately exit as no UNITY_EXIT_CODE can be derived.
+  exit 1;
+
+fi
 
 #
 # Display information about the result

dist/platforms/mac/steps/build.sh

@@ -149,8 +149,6 @@ echo ""
   $( [ "${MANUAL_EXIT}" == "true" ] || echo "-quit" ) \
   -batchmode \
   $( [ "${ENABLE_GPU}" == "true" ] || echo "-nographics" ) \
-  -username "$UNITY_EMAIL" \
-  -password "$UNITY_PASSWORD" \
   -customBuildName "$BUILD_NAME" \
   -projectPath "$UNITY_PROJECT_PATH" \
   $( [ -z "$BUILD_PROFILE" ] && echo "-buildTarget $BUILD_TARGET") \

dist/platforms/mac/steps/return_license.sh

@@ -4,15 +4,29 @@
 echo "Changing to \"$ACTIVATE_LICENSE_PATH\" directory."
 pushd "$ACTIVATE_LICENSE_PATH"
 
-/Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/MacOS/Unity \
-  -logFile - \
-  -batchmode \
-  -nographics \
-  -quit \
-  -username "$UNITY_EMAIL" \
-  -password "$UNITY_PASSWORD" \
-  -returnlicense \
-  -projectPath "$ACTIVATE_LICENSE_PATH"
+if [[ -n "$UNITY_LICENSING_SERVER" ]]; then
+  #
+  # Return any floating license used.
+  #
+  echo "Returning floating license: \"$FLOATING_LICENSE\""
+  /Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/Frameworks/UnityLicensingClient.app/Contents/MacOS/Unity.Licensing.Client \
+    --return-floating "$FLOATING_LICENSE"
+elif [[ -n "$UNITY_SERIAL" ]]; then
+  #
+  # SERIAL LICENSE MODE
+  #
+  # This will return the license that is currently in use.
+  #
+  /Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/MacOS/Unity \
+    -logFile - \
+    -batchmode \
+    -nographics \
+    -quit \
+    -username "$UNITY_EMAIL" \
+    -password "$UNITY_PASSWORD" \
+    -returnlicense \
+    -projectPath "$ACTIVATE_LICENSE_PATH"
+fi
 
 # Return to previous working directory
 popd

dist/platforms/ubuntu/steps/activate.sh

@@ -68,14 +68,18 @@ elif [[ -n "$UNITY_LICENSING_SERVER" ]]; then
   echo "Adding licensing server config"
 
   /opt/unity/Editor/Data/Resources/Licensing/Client/Unity.Licensing.Client --acquire-floating > license.txt #is this accessible in a env variable?
-  PARSEDFILE=$(grep -oP '\".*?\"' < license.txt | tr -d '"')
-  export FLOATING_LICENSE
-  FLOATING_LICENSE=$(sed -n 2p <<< "$PARSEDFILE")
-  FLOATING_LICENSE_TIMEOUT=$(sed -n 4p <<< "$PARSEDFILE")
 
-  echo "Acquired floating license: \"$FLOATING_LICENSE\" with timeout $FLOATING_LICENSE_TIMEOUT"
   # Store the exit code from the verify command
   UNITY_EXIT_CODE=$?
+
+  if [ $UNITY_EXIT_CODE -eq 0 ]; then
+    PARSEDFILE=$(grep -oP '\".*?\"' < license.txt | tr -d '"')
+    export FLOATING_LICENSE
+    FLOATING_LICENSE=$(sed -n 2p <<< "$PARSEDFILE")
+    FLOATING_LICENSE_TIMEOUT=$(sed -n 4p <<< "$PARSEDFILE")
+
+    echo "Acquired floating license: \"$FLOATING_LICENSE\" with timeout $FLOATING_LICENSE_TIMEOUT"
+  fi
 else
   #
   # NO LICENSE ACTIVATION STRATEGY MATCHED

dist/platforms/windows/entrypoint.ps1

@@ -18,6 +18,9 @@ regsvr32 C:\ProgramData\Microsoft\VisualStudio\Setup\x64\Microsoft.VisualStudio.
 # Kill the regsvr process
 Get-Process -Name regsvr32 | ForEach-Object { Stop-Process -Id $_.Id -Force }
 
+# Install Visual C++ 2013 Redistributables
+. "c:\steps\install_vcredist13.ps1"
+
 # Setup Git Credentials
 . "c:\steps\set_gitcredential.ps1"
 

dist/platforms/windows/install_vcredist13.ps1

@@ -0,0 +1,11 @@
+# For some reason, Unity is failing in github actions windows runners
+# due to missing Visual C++ 2013 redistributables.
+# This script downloads and installs the required redistributables.
+Write-Output ""
+Write-Output "#########################################################"
+Write-Output "#     Installing Visual C++ Redistributables (2013)     #"
+Write-Output "#########################################################"
+Write-Output ""
+
+
+choco install vcredist2013 -y --no-progress

src/model/build-parameters.ts

@@ -46,6 +46,7 @@ class BuildParameters {
   public androidSymbolType!: string;
   public dockerCpuLimit!: string;
   public dockerMemoryLimit!: string;
+  public dockerShmSize!: string;
   public dockerIsolationMode!: string;
   public containerRegistryRepository!: string;
   public containerRegistryImageVersion!: string;
@@ -179,6 +180,7 @@ class BuildParameters {
       chownFilesTo: Input.chownFilesTo,
       dockerCpuLimit: Input.dockerCpuLimit,
       dockerMemoryLimit: Input.dockerMemoryLimit,
+      dockerShmSize: Input.dockerShmSize,
       dockerIsolationMode: Input.dockerIsolationMode,
       containerRegistryRepository: Input.containerRegistryRepository,
       containerRegistryImageVersion: Input.containerRegistryImageVersion,

src/model/cloud-runner/tests/cloud-runner-github-checks.test.ts

@@ -17,6 +17,7 @@ describe('Cloud Runner Github Checks', () => {
       status: 200,
       data: {},
     });
+    // eslint-disable-next-line unicorn/no-useless-undefined
     jest.spyOn(GitHub as any, 'runUpdateAsyncChecksWorkflow').mockResolvedValue(undefined);
   });
 

src/model/docker.test.ts

@@ -13,4 +13,55 @@ describe('Docker', () => {
     };
     await Docker.run(image, parameters);
   });
+
+  // game-ci/unity-builder#840: Unity 6.6+ editors request 1GiB of shared
+  // memory and hard-fail against Docker's 64m default. This action never
+  // passed --shm-size at all, and exposed no input to work around it.
+  describe('--shm-size', () => {
+    const baseParameters = {
+      workspace: '/github/workspace',
+      actionFolder: '/action',
+      runnerTempPath: Action.rootFolder,
+      sshAgent: '',
+      sshPublicKeysDirectoryPath: '',
+      gitPrivateToken: '',
+      dockerWorkspacePath: '/github/workspace',
+      dockerCpuLimit: '4',
+      dockerMemoryLimit: '8192m',
+      dockerIsolationMode: 'default',
+    };
+
+    it('passes --shm-size on Linux when dockerShmSize is set', () => {
+      const command = Docker.getLinuxCommand('unityci/editor:latest', {
+        ...baseParameters,
+        dockerShmSize: '1025m',
+      } as any);
+
+      expect(command).toContain('--shm-size=1025m');
+    });
+
+    it('passes --shm-size on Windows when dockerShmSize is set', () => {
+      const command = Docker.getWindowsCommand('unityci/editor:latest', {
+        ...baseParameters,
+        dockerShmSize: '2g',
+      } as any);
+
+      expect(command).toContain('--shm-size=2g');
+    });
+
+    it('omits --shm-size when explicitly disabled with "0"', () => {
+      const command = Docker.getLinuxCommand('unityci/editor:latest', {
+        ...baseParameters,
+        dockerShmSize: '0',
+      } as any);
+
+      expect(command).not.toContain('--shm-size');
+    });
+
+    it('omits --shm-size when unset, rather than emitting "--shm-size=undefined"', () => {
+      const command = Docker.getLinuxCommand('unityci/editor:latest', baseParameters as any);
+
+      expect(command).not.toContain('--shm-size');
+    });
+  });
 });

src/model/docker.ts

@@ -4,6 +4,20 @@ import path from 'node:path';
 import { ExecOptions, exec } from '@actions/exec';
 import { DockerParameters, StringKeyValuePair } from './shared-types';
 
+/**
+ * Unity 6.6+ editors request 1GiB of shared memory and hard-fail with
+ * "Insufficient shared memory available" against Docker's 64m default
+ * (game-ci/unity-builder#840). BuildParameters defaults this to 1025m, the
+ * value unity-test-runner has always passed. '0'/'none' omits the flag so
+ * Docker's own default applies.
+ */
+function shmSizeFlag(dockerShmSize?: string): string {
+  const value = String(dockerShmSize ?? '').trim();
+  if (value === '' || value === '0' || value.toLowerCase() === 'none') return '';
+
+  return `--shm-size=${value}`;
+}
+
 class Docker {
   static async run(
     image: string,
@@ -49,6 +63,7 @@ class Docker {
       dockerWorkspacePath,
       dockerCpuLimit,
       dockerMemoryLimit,
+      dockerShmSize,
     } = parameters;
 
     const githubHome = path.join(runnerTempPath, '_github_home');
@@ -75,6 +90,7 @@ class Docker {
             --volume "${actionFolder}/BlankProject":"/BlankProject:z" \
             --cpus=${dockerCpuLimit} \
             --memory=${dockerMemoryLimit} \
+            ${shmSizeFlag(dockerShmSize)} \
             ${sshAgent ? `--volume ${sshAgent}:/ssh-agent` : ''} \
             ${
               sshAgent && !sshPublicKeysDirectoryPath
@@ -97,6 +113,7 @@ class Docker {
       dockerWorkspacePath,
       dockerCpuLimit,
       dockerMemoryLimit,
+      dockerShmSize,
       dockerIsolationMode,
     } = parameters;
 
@@ -107,6 +124,7 @@ class Docker {
             --workdir c:${dockerWorkspacePath} \
             --rm \
             ${ImageEnvironmentFactory.getEnvVarString(parameters)} \
+            --env BEE_CACHE_DIRECTORY=c:${dockerWorkspacePath}/Library/bee_cache \
             --env GITHUB_WORKSPACE=c:${dockerWorkspacePath} \
             ${gitPrivateToken ? `--env GIT_PRIVATE_TOKEN="${gitPrivateToken}"` : ''} \
             --volume "${workspace}":"c:${dockerWorkspacePath}" \
@@ -122,6 +140,7 @@ class Docker {
             --volume "${actionFolder}/BlankProject":"c:/BlankProject" \
             --cpus=${dockerCpuLimit} \
             --memory=${dockerMemoryLimit} \
+            ${shmSizeFlag(dockerShmSize)} \
             --isolation=${dockerIsolationMode} \
             ${image} \
             powershell c:/steps/entrypoint.ps1`;

src/model/input.ts

@@ -241,6 +241,17 @@ class Input {
     return Input.getInput('dockerWorkspacePath') ?? '/github/workspace';
   }
 
+  /**
+   * Unity 6.6+ editors request 1GiB of shared memory and hard-fail with
+   * "Insufficient shared memory available" against Docker's 64m default
+   * (game-ci/unity-builder#840). unity-test-runner has always passed 1025m,
+   * so match it here rather than leaving builds broken by default. '0' or
+   * 'none' omits the flag and uses Docker's own default.
+   */
+  static get dockerShmSize(): string {
+    return Input.getInput('dockerShmSize') ?? '1025m';
+  }
+
   static get dockerCpuLimit(): string {
     return Input.getInput('dockerCpuLimit') ?? os.cpus().length.toString();
   }