├── .github
    └── workflows
    │   └── apk.yaml
├── .gitmodules
├── Dockerfile
├── Makefile
├── README.md
└── custom_server.patch.tpl


/.github/workflows/apk.yaml:
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 1 | on: push
 2 | 
 3 | jobs:
 4 |   apk:
 5 |     runs-on: ubuntu-latest
 6 |     container:
 7 |       image: ghcr.io/${{ github.repository }}
 8 |       credentials:
 9 |         username: ${{ github.actor }}
10 |         password: ${{ secrets.CR_PAT }}
11 |     steps:
12 |       - uses: actions/checkout@v3
13 |         with:
14 |           submodules: true
15 |       - name: make apk
16 |         env:
17 |           TAILSCALE_SERVER: ${{ secrets.TAILSCALE_SERVER }}
18 |         run: |
19 |           make patch
20 |           make apk
21 |       - name: save apk artifact
22 |         uses: actions/upload-artifact@v3
23 |         with:
24 |           name: apk
25 |           path: tailscale-android/tailscale-debug.apk
26 | 


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/.gitmodules:
--------------------------------------------------------------------------------
1 | [submodule "tailscale-android"]
2 | 	path = tailscale-android
3 | 	url = git@github.com:tailscale/tailscale-android.git
4 | 


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/Dockerfile:
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1 | FROM tailscale-android
2 | 
3 | RUN apt-get install -y patch gettext-base
4 | 


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/Makefile:
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 1 | .PHONY: docker patch apk
 2 | 
 3 | ANDROID_REPO := tailscale-android/
 4 | PATCHFILES := custom_server.patch
 5 | DOCKER_TAG := tailscale-android
 6 | 
 7 | docker:
 8 | 	docker build -t $(DOCKER_TAG) $(ANDROID_REPO) && \
 9 | 		docker build -t $(DOCKER_TAG)-builder -f Dockerfile .
10 | 
11 | $(PATCHFILES):
12 | 	envsubst '$$TAILSCALE_SERVER' < $@.tpl > $@
13 | 	patch -d $(ANDROID_REPO) -p1 < $@
14 | 
15 | patch: $(PATCHFILES)
16 | 
17 | apk:
18 | 	make -C $(ANDROID_REPO) tailscale-debug.apk
19 | 
20 | clean:
21 | 	rm -f $(PATCHFILES)
22 | 	git -C $(ANDROID_REPO) reset --hard
23 | 	git -C $(ANDROID_REPO) clean -dfx
24 | 


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/README.md:
--------------------------------------------------------------------------------
 1 | ### tailscale android builder
 2 | 
 3 | This repo will build the tailscale android client with a custom server url
 4 | using github actions.
 5 | 
 6 | ### Usage:
 7 | 
 8 | 1. Fork this repo
 9 | 2. Configure secrets for github actions:
10 | 
11 | * `CR_PAT`: personal access token with read access to ghcr
12 | * `TAILSCALE_SERVER`: FQDN of tailscale server: e.g. https://controlplane.tailscale.com
13 | 
14 | 3. Build the "builder image" for the apk:
15 | 
16 | ```
17 | make docker
18 | ```
19 | 
20 | 4. Push the builder image to ghcr:
21 | 
22 | ```
23 | docker tag tailscale-android-builder ghcr.io/<github_username>/tailscale-android-builder
24 | docker push ghcr.io/<github_username>/tailscale-android-builder
25 | ```
26 | 
27 | 5. Trigger a workflow run in github actions. The apk will be stored as an
28 |    artifact of the build. Recommend deleting the artifact after downloading
29 |    from github if it is public, as this will contain your personal control
30 |    plane server fqdn.
31 | 
32 | ### versioning:
33 | 
34 | The tailscale-android repo is a submodule. Update the submodule commit sha to
35 | the target release and push to recreate a new apk.
36 | 


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/custom_server.patch.tpl:
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 1 | diff --git a/cmd/tailscale/backend.go b/cmd/tailscale/backend.go
 2 | index 966689d..d258147 100644
 3 | --- a/cmd/tailscale/backend.go
 4 | +++ b/cmd/tailscale/backend.go
 5 | @@ -136,8 +136,11 @@ func newBackend(dataDir string, jvm *jni.JVM, appCtx jni.Object, store *stateSto
 6 |  
 7 |  func (b *backend) Start(notify func(n ipn.Notify)) error {
 8 |  	b.backend.SetNotifyCallback(notify)
 9 | +	prefs := ipn.NewPrefs()
10 | +	prefs.ControlURL = "$TAILSCALE_SERVER"
11 |  	return b.backend.Start(ipn.Options{
12 | -		StateKey: "ipn-android",
13 | +		StateKey:    "ipn-android",
14 | +		UpdatePrefs: prefs,
15 |  	})
16 |  }
17 |  
18 | 


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