Build and Update¶

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Build with GitHub | Mac-Xcode | Script
Update with GitHub | Mac-Xcode
Special Section on Trio App Group Special Section on Trio App Group

Build Trio with GitHub¶

The Trio repository contains instructions for building the Trio app using a browser and GitHub. More detailed instructions are also available in LoopDocs.

• GitHub Build Instructions
• LoopDocs: GitHub Build Overview
• LoopDocs: GitHub Build Other Apps

Every app you build will use the same 6 Secrets.

• Fork from: https://github.com/nightscout/Trio
• Identifiers for Trio: see Table of Identifiers
• You use the Trio App Group for Trio, see Create the Trio App Group
• Add the Trio App Group to these identifiers:
  • Trio
  • Trio Watch
  • Trio WatchKit Extension
• In App Store Connect, the Bundle ID for Trio will be: org.nightscout.TEAMID.trio

Create the Trio App Group¶

If you already have a Trio App Group

• You can skip this step - your existing App Groups are found at this link: App Group List
• If your Trio App Group was created from a Mac with Xcode, you may choose to edit the Description to make the NAME match

If you do not have a Trio App Group:

• Go to Register an App Group on the Apple developer site and use the table below to help you create one.

Table of Identifiers¶

• If you built previously using a Mac with Xcode, you may see the Xcode version in your NAME column - it starts with XC and then the IDENTIFIER is appended where the . is replaced with a space, the example for Trio is shown in detail
• If you built during early beta testing, you might not have Trio at the beginning of each IDENTIFIER and the full NAME may be slightly different
• Optional: You can click on a given row, and edit the Description to match the NAME from the table below. This might make building easier in the future

Add Trio App Group to Identifiers¶

Open the App IDs Identifier page for your Apple Developer Account.

Click on the Trio Identifier and assign the Trio App Group to the Identifier - see graphic below.

Repeat this for the other 2 identifiers that need to have an App Group assigned: Trio Watch and Trio WatchKit Extension

Configure Trio App¶

Follow the directions in LoopDocs, but use the Trio Bundle ID

• In App Store Connect, the Bundle ID for Trio will be: org.nightscout.TEAMID.trio

Create Certificates¶

Follow the directions in LoopDocs but run the Create Certificates action for the Trio fork.

Build Trio¶

Follow the directions in LoopDocs but run the Build Trio action for the Trio fork.

Optional¶

One-Time Update to Display Branch And Commit in Testflight¶

The Trio build can be configured to display the branch name and commit ID as test notes in TestFlight. This is an optional step, which can be especially useful if building the dev branch.

First, you must have already built Trio and have it available on Apple App Store Connect.

• Tap on the TestFlight tab
• Choose any build to open a new detailed screen for that build
• In the Test Details section, type anything you want

After you have done this one-time step, each successive build will include the branch name and commit automatically.

You can add additional tests notes for any build if you desire.

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Update Trio with GitHub¶

First, make sure any Apple License agreements have been accepted:

• Apple Developer Page

Second, make sure you have a valid Distributor certificate; if not, see Distribution Certificate:

• Apple Certificate Page

One-time Update for Trio App Group¶

If you built previously, before the App Group changed from Loop to Trio, you need to do this step. Then you can Continue Updating.

• Create the Trio App Group
• Examine the Table of Identifiers - it is optional, but editing the descriptions to match the Names in that table will make following directions easier in the future
• Update the App Group to be the Trio App Group for the Identifiers (Trio, Trio Watch and Trio Watchkit Extension)
• Run the Action: 3. Create Certificates to make certificates that go with the new Trio App Group

Continue Updating¶

Open your fork at github.com/YOUR-USERNAME/Trio with your GitHub username instead of YOUR-USERNAME

• Look to see if your fork is up to date
• If your fork shows that your branch is behind, sync the branch to get the latest updates

Distribution Certificate¶

When you first build using GitHub, a Distribution Certificate is generated. It typically is valid for one year. You should get an email from Apple when you are within 30 days of that certificate expiring. When it expires, you can no longer build a new app. (Existing apps in TestFlight are not affected, they get the full 90 days.)

The directions to renew your Distribution Certificate are found in LoopDocs: Renew Certificate.

Build Trio¶

Select Actions: 4. Build Trio and wait about an hour for your updated app to appear in TestFlight.

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Build Trio with Xcode¶

If you build Trio on your Mac using Xcode, the recommendation is to use the TrioBuildSelectScript to build your code.

Build Trio with Script¶

The TrioBuildSelectScript is similar to the script used to build Loop. If you need it, extensive instructions for that script are provided at these links: LoopDocs: Build Select Script and Loop and Learn: Build Select Script.

The TrioBuildSelectScript offers the choice to:

1. Build Trio
2. Build Related Apps
3. Run Maintenance Utilities
4. Exit Script

To execute the TrioBuildSelectScript, open a terminal on your Mac and copy and paste the command below into the terminal. Then, read and follow the directions.

/bin/bash -c "$(curl -fsSL \
  https://raw.githubusercontent.com/loopandlearn/lnl-scripts/main/TrioBuildSelectScript.sh)"

Build Trio¶

When you select Build Trio, you will be provided with a choice of branches with information to guide your selection and URL for documentation. This script will then download a fresh copy of your selected branch and guide you through building with Xcode on your Mac.

• Once the download completes, the script will also
  • Create the automatic signing file
  • Offer to remove provisioning profiles from your computer to ensure the build will last an entire year
  • Provide instructions for how to build the app once Xcode opens
  • Open Xcode with your new download.
• At this point, the main menu is displayed again for you to select another option or to exit the script

The download is placed in your Downloads folder in a directory called BuildTrio. The downloaded clone is found in a folder with the branch name, date, and time encoded.

Build Related Apps¶

When you select Build Related Apps, you will be provided with a choice of apps that users of Trio often use. Once you make your selection, the script will provide similar steps to download and build the selected app.

The choices are:

1. Build Loop Follow
2. Build xDrip4iOS
3. Return to Menu

Run Maintenance Utilities¶

When you select Run Maintenance Utilities, you will be provided with a choice of utilities helpful for Mac builders.

The following options are offered:

1. Delete Old Downloads
2. Clean Derived Data
3. Xcode Cleanup (The Big One)
4. Clean Profiles
5. Return to Menu

For more information, refer to Loop and Learn: Maintenance Utitilites documentation.

Build Errors¶

If you encounter any build issues, please look at the LoopDocs Build errors page. Only some things on that page are relevant for building Trio, but many potential issues will likely be covered there. You will also get helpful advice about what info to provide if you need to ask for help. When you have identified the error message(s), you can use the search tool in LoopDocs to see if your error is mentioned.

If you need it, you are most likely to get help in one of these groups:

• Discord: Trio channel
• Facebook group: Trio
• Facebook groups like Loop and Learn and Looped primarily focus on Loop but offer a wide variety of support surrounding all types of DIY Looping.

xDrip4iOS as CGM Source¶

If you want to use xDrip4iOS as a CGM source via “shared app group,” you must also build that app from a source with the same developer ID used for building Trio. Scripts are available for these apps as well. All scripts follow the same download and build pattern and configure automatic signing files for you.

The download is placed in your Downloads folder in a directory called BuildxDrip4iOS. The downloaded clone is found in a folder with the branch name, date, and time encoded.

These can be accessed using the TrioBuildSelectScript menu options mentioned above. Or you can run each script individually.

xDrip4iOS¶

/bin/bash -c "$(curl -fsSL \
  https://raw.githubusercontent.com/loopandlearn/lnl-scripts/main/BuildxDrip4iOS.sh)"

Alternative Branch for Trio¶

Sometimes, specific branches are offered for testing. Any desired branch can be cloned using the Build Trio script. After the final quote of the script command, add a space, hyphen, space, and branch_name. An example is shown below: replace branch_name with your desired branch. Note that specific branches like this are not deleted as part of the Delete Old Downloads utility discussed in Maintenance Utilities.

/bin/bash -c "$(curl -fsSL \
  https://raw.githubusercontent.com/loopandlearn/lnl-scripts/main/BuildTrio.sh)" - branch_name

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Update Trio with Xcode¶

Because Trio uses submodules, there are actions you need to perform when updating that are easiest using the command line interface (CLI) in a terminal opened in the same folder as the Trio workspace.

If you prefer, you can use the Build Script to download and build a fresh copy.

This section tells you how to update the version you already have on your computer.

Open Xcode. If your Trio workspace is not already open, you can usually find it in the recent projects, as shown in the graphic below. You can also pull down the Xcode menu for File, select Open Recent, and find your workspace.

Open Terminal¶

Once you have Xcode open with your previous build of Trio, the first thing to do is open a terminal. Here are two methods - choose one:

1. Use Xcode, Behaviors, Open Terminal if you configured Xcode Behaviors
2. Locate the Trio folder using Where is my Download

Customizations¶

Always attempt to Update your Code first. Typically, your customizations can be left alone and git will merge the new code without requiring any additional action on your part.

• If you have a customization, you can often proceed with the update with no issues
• If your customization conflicts with a file or submodule that is being updated, you get a clear error message and need to proceed to Fix Trio Conflicts

Update your Code¶

In the terminal, you will copy and paste this pair of commands to update your workspace and all your submodules.

git fetch
git pull --recurse

The first command git fetch brings down any updates about the state of the Trio workspace repository from GitHub.

The second command git pull --recurse does several things:

• Brings down any updates about the state of the submodule repositories from GitHub, e.g., Fetching submodule XXXX repeated for each submodule
• Merges any changes from GitHub into your local copy of the Trio workspace
• For each submodule, it updates the version to match the one selected in GitHub, see Submodule Update for more details

There can be errors in several places, for example:

error: Your local changes to the following files would be overwritten by merge:
    FreeAPS/folder/file.swift
Please commit your changes or stash them before you merge.
Aborting

The pull command halts at this error and does not move on updating the submodules. You must first fix the Trio workspace files using Fix Trio Conflicts.

• If there was no error similar to the one shown above, you will see the word Updating with the list of files changed.
• If there were no updates, you'll see Already up to date

Submodule Update¶

• If there are no updates to submodules, you won't see any submodule update messages - that is not uncommon
• If there are updates to one or more submodules with no errors, you will see messages indicating the submodules are being checked out similar to the one below

Submodule path 'ModuleName': checked out 'f11abde5e2eea2cbf7ac80f3f4bc4bc6e7f6de56'

If you see the word error or conflict on the output, similar to the following, head over to Fix Submodule Conflicts.

error: Your local changes to the following files would be overwritten by checkout:
    SubModuleName/folder/file.swift
Please commit your changes or stash them before you switch branches.
Aborting
fatal: Unable to checkout 'f11abde5e2eea2cbf7ac80f3f4bc4bc6e7f6de56' in submodule path 'SubModuleName'

If you saw no errors, you are ready to build.

Fix Trio Conflicts¶

If you have customizations in the Trio code (in the workspace) that cause a conflict when you pull, it is best to delete those and start fresh. (Expert users know how to handle this, these directions are for novices):

git reset --hard
git clean -fd
git pull

You should see the words: Your branch is up to date with origin/main (or dev or other branch if you are not running main.)

Now you need to continue to update the submodules with this command:

git submodule update

If there are no conflicts, you are ready to build the Trio app to your phone.

If there are conflicts similar to those shown in Submodule Update, fix them before building.

Fix Submodule Conflicts¶

If you have customizations in the submodules that conflict with the update, you see a message fatal: Unable to checkout the submodule. It is easiest to discard the customizations and reapply them manually after the update:

• Read which submodule failed to checkout
• Change directory to that module: cd modulename
• Discard your changes: git reset --hard; git clean -fd
• Return to the Trio folder and try again: cd ..; git submodule update

If another submodule fails to checkout, repeat the steps for that modulename.

If there are no errors, the Trio code is now updated.

If Xcode is not open, you can open it by typing xed . in the Trio folder of your terminal window.

You can now build the updated Trio app to your phone.

First Xcode Build with Trio App Group¶

If you previously built using Xcode when the Loop App Group was used, you may need to let Xcode connect with Apple to update the new Trio App Group. See instructions at Mac Build after App Group Change.

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Xcode Behaviors¶

You can add Behaviors to your version of Xcode. These custom Behaviors only need to be added once.

You will create a shell script and add it to Xcode.

• Open Terminal will open a terminal in the workspace or project folder currently in use by Xcode

Prepare the Shell Script¶

Open a new terminal:

Step 1: Create a folder to store your shell scripts by copying and pasting the next line (only do this one time or you will get an error message):

mkdir ~/scripts

Step 2: Copy and paste this command into your terminal to prepare the Open Terminal shell script:

touch ~/scripts/open_terminal.sh; open -e ~/scripts/open_terminal.sh

Copy and paste the following lines into the editor and then save and close the file.

#!/bin/bash
open -a Terminal "`pwd`"

Step 3: Make the shell script executable; Copy and paste this command into your terminal:

chmod +x ~/scripts/*.sh

Add Behaviors to Xcode¶

Under the Xcode menu item, select Behaviors, Edit Behaviors

Follow these steps (refer to the graphic below):

1. At the bottom of the window, click the + sign
2. Under the Custom section, you should see the New Behavior row, enter Open Terminal
3. On the right side at the bottom, click on Run, then Choose Script

• Navigate to your username (mine is marion) and find the scripts directory
• Highlight the file open-terminal.sh and then select Save

The Behavior Open Terminal is now ready for you to use, as shown in this graphic.

Return to Open Terminal.

Where is my Download¶

If you have Xcode open, you can right-click on any file and select Show in Finder. Then at the bottom of the Finder window, right-click on the Trio folder and select New Terminal at Folder.

If you do not have Xcode open, you can use Finder to locate the directory where the BuildTrio script saved the code. The directory is named after the branch with the date and time for the download:

• Released (main) branch: Downloads/BuildTrio/Trio_main-[date-time]/Trio
  • Example: ~/Downloads/BuildTrio/Trio_main-220122-1352/Trio
• Development (dev) branch: Downloads/BuildTrio/Trio_dev-[date-time]/Trio
  • Example: ~/Downloads/BuildTrio/Trio_dev-220108-1827/Trio

Use Finder to open a Terminal window at the Trio directory by right-clicking on it and selecting New Terminal at Folder. 

To open Xcode, type xed . in the Terminal.

Return to Open Terminal.

Special Section on Trio App Group¶

• If you have never built Trio before - just follow the instructions on this page: return Top of Page
• If you have already built Trio and have added the Trio App Group: return Top of Page
• If you have already built Trio, but you did not add the Trio App Group (or are not sure), please read this section for hints and help

Instructions for GitHub | Mac-Xcode

Browser Build after App Group Change¶

In order to build the Trio app with Browser Build, you must assign the Trio App Group to 3 of the 4 identifiers for Trio.

Step 1: Create Trio App Group¶

• Check if you have a Trio App Group: List your App Groups
• Create a Trio App Group if you don't have one: Register an App Group

Step 2: Assign Trio App Group to Trio Identifiers¶

Return to Add Trio App Group to Identifiers

Mac Build after App Group Change¶

The first time you build Trio after the change from Loop App Group to Trio App Group, you are likely to see the build error in the first graphic.

You must be connected to the internet and must allow Xcode to connect to Apple to update your app group. Tap in the four locations (in order): (1) Folder Icon, (2) FreeAPS folder, (3) Signing & Capabilities and (4) Target: FreeAPS, as indicated in the graphic below. The app group may momentarily appear in red font, then will update to black font for the trio-app-group. Continue until you have examined three targets FreeAPS, FreeAPSWatch and FreeAPSWatch Watchkit Extension. When those targets show the correct App Group, press the build symbol again.

Consequences of Trio App Group¶

If you use xDrip4iOS as your CGM for Trio, it needs to support the same App Group as Trio.

xDrip4iOS requires version 5.3.1 or newer to support the Trio App Group