Installing and Updating the Tatin Client

You don't need to worry about installing Tatin if you use version 19.0 of Dyalog: In 19.0 Tatin just needs to be activated with the ]activate user command.

In 18.2 you need to install Tatin yourself.

• Tatin needs a Unicode version of Dyalog
• Dyalog version 18.2 or better
• Link version 3.0.8 or better

Note that when you call ]Tatin.Init, Tatin will check whether those requirements are met.

Strictly speaking it is not necessary to install Tatin for 19.0, because Tatin is part of a 19.0-installation. However, before it can be used it must be activated. That's because in 19.0 it is still experimental.

Note that activating is available in 19.0 only. Activating is not supported in 18.2.

In order to activate Tatin, execute

]Activate -??

and follow the instructions.

⍝⍝⍝ Version specific

⍝ Windows
<HOME>\Documents\Dyalog APL-64 19.0 Unicode Files

⍝ Others
<HOME>/dyalog.190U64.files

⍝⍝⍝ Version agnostic

⍝ Windows
<HOME>\Documents\Dyalog APL Files

⍝ Others
<HOME>/dyalog.files

]Deactivate [all|cider|tatin] [-versionagnostic]

Instructions:

1. Download the latest release of the Tatin client from https://github.com/aplteam/Tatin/releases
2. Unzipping the file will produce a subdirectory named Tatin/ that you should then place in the appropriate installation folder discussed in a second

C:\Users\<⎕AN>\Documents\Dyalog APL[-64] <version> Unicode Files\SessionExtensions\CiderTatin

/home/<⎕AN>/dyalog.<version>U<bit>.files/SessionExtensions/CiderTatin

/Users/<⎕AN>/dyalog.<version>U<bit>.files/SessionExtensions/CiderTatin

⍝ Windows
C:\Users\<⎕AN>\Documents\Dyalog APL Files\SessionExtensions\CiderTatin

⍝ Linux
/home/<⎕AN>/dyalog.files/SessionExtensions/CiderTatin

⍝ Mac OS
/Users/<⎕AN>/dyalog.files/SessionExtensions/CiderTatin

As a result you should see something like this:

⍝ Windows
...\Dyalog APL[-64] <version> Unicode Files\SessionExtensions\CiderTatin\Tatin

⍝ Linux & Mac OS
.../dyalog.<version><bit>.files/SessionExtensions/CiderTatin/Tatin

Though Tatin's user command script etc. is now in place, Dyalog does not know about it yet. To achieve that we have to add the folder to SALT's search path. This step needs to be carried out only once for version 18.2

Execute one of the following commands:

]SALT.Settings cmddir ",C:\Users\<⎕AN>\Documents\Dyalog APL-64 18.2 Unicode Files\SessionExtensions\CiderTatin" -p

]SALT.Settings cmddir ",/home/<⎕AN>/dyalog.182U64.files/SessionExtensions/CiderTatin -p

]SALT.Settings cmddir ",/Users/<⎕AN>/dyalog.182U64.files/SessionExtensions/CiderTatin" -p

Notes:

• Note the comma (,) in front of the path: it tells SALT to add the path, rather than using it as a replacement
• The -p stands for “permanent”; this makes sure your addition to the search path is permanent
• In case you installed Tatin into a version-agnostic folder you must specify that folder of course

Any newly started instance of Dyalog now comes with the user command ]Tatin.*.

There is no point in having a function Run.aplf in place with 8.2: only in 19.0 did Dyalog add the feature that a function Run.aplf will be loaded and executed as part of Dyalog's bootstrapping procedure; in earlier versions such a function is not executed.

As a side effect of executing any of the Tatin user commands the Tatin API will become available via ⎕SE.Tatin.

If you want the Tatin API to be available right from the start: this is discussed soon.

Once installed, any suitable version of Dyalog will provide a list of the Tatin user commands once you enter:

      ]tatin -?

The script Tatin.dyalog is the interface between the Dyalog user command framework and the Tatin API.

When any of the Tatin user commands is executed, it will check whether the API is already loaded — that will be the case in 19.0 once Tatin is activated. If it's not available yet (18.2), it will be loaded.

The way to achieve this goal requires the introduction or modification of a file setup.dyalog in your MyUCMDs/ folder.

Where to find the MyUCMDs/ folder depends on your operating system:

• On Windows it's usually C:\Users\{username}\Documents\
• On Linux (including the PI) it is /home/{username}/
• On Mac OS it is /Users/{username}/

Note that only on Windows is the folder created as part of the installation routine. On other platforms you must create the folder yourself.

Create one that looks like this:

:Namespace SetItUp

    ∇ {r}←Setup arg;⎕IO;⎕ML;dmx
      r←⍬
      ⎕IO←1 ⋄ ⎕ML←1
      :If ~IfAtLeastVersion 19
      :AndIf 0=≢⎕←AutoloadTatin ⎕SE.SALTUtils.DEBUG
          {}⎕SE.SALTUtils.ResetUCMDcache -1
      :EndIf
    ∇

    ∇ r←AutoloadTatin debug;wspath;path2Config
      r←0 0⍴''
      :Trap debug/0
          :If 0=⎕SE.⎕NC'_Tatin'  ⍝ In 19.0 it most likely will already be there!
              :If ~IfAtLeastVersion 18
                  r←'Tatin not loaded: not compatible with this version of Dyalog'
              :ElseIf 80≠⎕DR' '              ⍝ Not in "Classic"
                  r←'Tatin not loaded: not compatible with Classic'
              :Else
                  ⎕SE.⎕EX¨'_Tatin' 'Tatin'
                  wspath←1 GetProgramFilesFolder '/SessionExtensions/CiderTatin/Tatin/Client.dws'
                  '_Tatin'⎕SE.⎕CY wspath
                  path2Config←⊃⎕nparts ⎕SE._Tatin.Client.FindUserSettings ⎕AN
                  'Create!'⎕SE._Tatin.Client.F.CheckPath path2Config
                  'Tatin'⎕SE.⎕NS''
                  path2Config ⎕SE._Tatin.Admin.EstablishClientInQuadSE ⍬
              :EndIf
          :EndIf
      :Else
          r←'Attempt to load Tatin failed with ',⎕DMX.EM
      :EndTrap
    ∇

      IfAtLeastVersion←{
      ⍝ ⍵ is supposed to be a number like 15 or 17.1, representing a version of Dyalog APL.
      ⍝ Returns a Boolean that is 1 only if the current version is at least as good.
          ⍵≤{⊃(//)⎕VFI ⍵/⍨2>+\'.'=⍵}2⊃# ⎕WG'APLVersion'
      }

    ∇ r←{versionAgnostic}GetProgramFilesFolder postFix;version;aplVersion;OS
      ⍝ Returns the path to Dyalog's version-specific program files folder.\\
      ⍝ Works on all platforms but returns different results.\\
      ⍝ Under Windows typically:\\
      ⍝ `C:\Users\<⎕AN>\Documents\Dyalog APL[-64] 19.0 Unicode Files' ←→ GetMyUCMDsFolder
      ⍝ ⍺ is optional and defaults to 0, meaning the version-agnostic folder is returned.
      ⍝ If ⍺←1, the folder associated with the currently running version of Dyalog is returned.
       versionAgnostic←{0<⎕NC ⍵:⍎⍵ ⋄ 0}'versionAgnostic'
       OS←3↑1⊃# ⎕WG'APLVersion'
       postFix←{(((~'/\'∊⍨⊃⍵)∧0≠≢⍵)/'/'),⍵}postFix
       aplVersion←# ⎕WG'APLVersion'
       :If versionAgnostic
           :If OS≡'Win'
               version←((∨/'-64'⍷1⊃aplVersion)/'-64'),' ',({⍵/⍨2>+\⍵='.'}2⊃aplVersion),' ',(80=⎕DR' ')/'Unicode'
               r←(2 ⎕NQ #'GetEnvironment' 'USERPROFILE'),'\Documents\Dyalog APL',version,' Files',postFix
           :Else
               version←({'.'~⍨⍵/⍨2>+\⍵='.'}2⊃aplVersion),((80=⎕DR' ')/'U'),((1+∨/'-64'⍷1⊃aplVersion)⊃'32' '64')
               r←(⊃⎕SH'echo $HOME'),'/dyalog.',version,'.files',postFix
           :EndIf
       :Else
           :If OS≡'Win'
               r←(2 ⎕NQ #'GetEnvironment' 'USERPROFILE'),'\Documents\Dyalog APL Files',postFix
           :Else
               r←(⊃⎕SH'echo $HOME'),'/dyalog.files',postFix
           :EndIf
       :EndIf
   ∇

:EndNamespace

Copy the functions IfAtLeastVersion, GetProgramFilesFolder and AutoLoadTatin from above into your own setup.dyalog script and then make sure that AutoLoadTatin is called from your Setup function.

Also, call {}⎕SE.SALTUtils.ResetUCMDcache -1 in case AutoLoadTatin returned an empty vector (read: was executed successfully) in order to make sure that the Tatin user commands are found.

You've installed (18.2) or activated (later than 18.2) Tatin before and want to update it to the latest version.

In that case you might need to perform some action, depending on how old your version of Tatin is.

Versions before 0.105.0 might have been installed into one of these folders:

C:\Users\<user>\Documents\MyUCMDs\     ⍝ Windows
/users/<user>/MyUCMDs/                 ⍝ Mac-OS
/home/<user>/MyUCMDs/                  ⍝ Linux

If that is the case then, in order to keep things simple, you are advised to remove the folder Tatin from the MyUCMDs/ folder and install Tatin (and, if installed, Cider) from scratch rather than updating it.

If have loaded Tatin into ⎕SE with a script setup.dyalog you might need to make amendment to it.

Once you have Tatin 0.105.0 (or later) installed in the right place you can use ]Tatin.UpdateTatin for updating Tatin to a later version.

Just execute:

]Tatin.UpdateTatin

All necessary steps will be executed; eventually the new version number will be reported.

Notes:

• The command will put the release notes on display in your default browser
• Although Tatin is updated on disk, the workspace from which the update command was executed is not updated for technical reasons — start a new instance of Dyalog to get the latest version

• 19.0 and later only: Tatin's Update command overwrites the version in the installation directory in your home directory, not the version that came originally with Dyalog APL; that remains unchanged.

Debugging is the process of removing bugs from code, while programming is how you introduce them in the first place.

There is always the possibility that the update process is itself buggy. Calling it again usually does not help, so you need an escape route.