Azure DevOps Migration Tools

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TfsNodeStructure

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2024-04-05 11:36:18 -0500

The TfsNodeStructureEnricher is used to create missing nodes in the target project. To configure it add a TfsNodeStructureOptions section to CommonEnrichersConfig in the config file. Otherwise defaults will be applied.

Options

Parameter name Type Description Default Value
AreaMaps Dictionary Remapping rules for area paths, implemented with regular expressions. The rules apply with a higher priority than the `PrefixProjectToNodes`, that is, if no rule matches the path and the `PrefixProjectToNodes` option is enabled, then the old `PrefixProjectToNodes` behavior is applied. {}
Enabled Boolean If enabled this will run this migrator true
IterationMaps Dictionary Remapping rules for iteration paths, implemented with regular expressions. The rules apply with a higher priority than the `PrefixProjectToNodes`, that is, if no rule matches the path and the `PrefixProjectToNodes` option is enabled, then the old `PrefixProjectToNodes` behavior is applied. {}
NodeBasePaths String[] The root paths of the Ares / Iterations you want migrate. See [NodeBasePath Configuration](#nodebasepath-configuration) ["/"]
RefName String For internal use missng XML code comments
ReplicateAllExistingNodes Boolean missng XML code comments missng XML code comments
ShouldCreateMissingRevisionPaths Boolean When set to True the susyem will try to create any missing missing area or iteration paths from the revisions. missng XML code comments

Example

A basic sample for TfsNodeStructure configuration.



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{
  "$type": "TfsNodeStructureOptions",
  "Enabled": true,
  "NodeBasePaths": null,
  "AreaMaps": {
    "$type": "Dictionary`2"
  },
  "IterationMaps": {
    "$type": "Dictionary`2"
  },
  "ShouldCreateMissingRevisionPaths": true,
  "ReplicateAllExistingNodes": false
}

Iteration Maps and Area Maps

NOTE: It is NOT posible to migrate a work item if the Area or Iteration path does not exist on the target project. This is because the work item will be created with the same Area and Iteration path as the source work item. If the path does not exist, the work item will not be created. There is not way around this!

You have two options to solve this problem:

«««< HEAD

  1. You can manually create the mentioned work items. This is a good option if you have a small number of work items or a small number of missing nodes. This will not work if you have work items that were moved from one project to another. Those Nodes are impossible to create in the target project.

  2. You can manualy create the mentioned work items. This is a good option if you have a small number of work items or a small number of missing nodes. This will not work if you have work items that were moved from one project to another. Those Nodes are imposible to create in the target project.

    origin/master

  3. You can use the AreaMaps and IterationMaps to remap the nodes to existing nodes in the target project. This is a good option if you have a large number of work items or a large number of missing nodes.

Overview

These two configuration elements apply after the NodeBasePaths selector, i.e. only on Areas and Iterations that have been selected for migration. They allow to change the area path, respectively the iteration path, of migrated work items.

These remapping rules are applied both while creating path nodes in the target project and when migrating work items.

These remapping rules are applied with a higher priority than the PrefixProjectToNodes option. This means that if no declared rule matches the path and the PrefixProjectToNodes option is enabled, then the old behavior is used.

The syntax is a dictionary of regular expressions and the replacement text.

Warning: These follow the .net regular expression language. The key in the dictionary is a regular expression search pattern, while the value is a regular expression replacement pattern. It is therefore possible to use back-references in the replacement string.

Warning: Special characters in the acceptation of regular expressions and json both need to be escaped. For a key, this means, for example, that a literal backslash must be escaped for the regular expression language \\ and each of these backslashes must then be escaped for the json encoding: \\\\. In the replacement string, a literal $ must be escaped with an additional $ if it is followed by a number (due to the special meaning in regular expression replacement strings), while a backslash must be escaped (\\) due to the special meaning in json.

Advice: To avoid unexpected results, always match terminating backslashes in the search pattern and replacement string: if a search pattern ends with a backslash, you should also put one in the replacement string, and if the search pattern does not include a terminating backslash, then none should be included in the replacement string.

Configuration

"IterationMaps": {
  "^OriginalProject\\\\Path1(?=\\\\Sprint 2022)": "TargetProject\\AnotherPath\\NewTeam",
  "^OriginalProject\\\\Path1(?=\\\\Sprint 2020)": "TargetProject\\AnotherPath\\Archives\\Sprints 2020",
  "^OriginalProject\\\\Path2": "TargetProject\\YetAnotherPath\\Path2",
},
"AreaMaps": {
  "^OriginalProject\\\\(DescopeThis|DescopeThat)": "TargetProject\\Archive\\Descoped\\",
  "^OriginalProject\\\\(?!DescopeThis|DescopeThat)": "TargetProject\\NewArea\\",
}

  • "^OriginalProject\\\\Path1(?=\\\\Sprint 2022)": "TargetProject\\AnotherPath\\NewTeam",

    In an iteration path, OriginalProject\Path1 found at the beginning of the path, when followed by \Sprint 2022, will be replaced by TargetProject\AnotherPath\NewTeam.

    OriginalProject\Path1\Sprint 2022\Sprint 01 will become TargetProject\AnotherPath\NewTeam\Sprint 2022\Sprint 01 but OriginalProject\Path1\Sprint 2020\Sprint 03 will not be transformed by this rule.

  • "^OriginalProject\\\\Path1(?=\\\\Sprint 2020)": "TargetProject\\AnotherPath\\Archives\\Sprints 2020",

    In an iteration path, OriginalProject\Path1 found at the beginning of the path, when followed by \Sprint 2020, will be replaced by TargetProject\AnotherPath\Archives\\Sprints 2020.

    OriginalProject\Path1\Sprint 2020\Sprint 01 will become TargetProject\AnotherPath\Archives\Sprint 2020\Sprint 01 but OriginalProject\Path1\Sprint 2021\Sprint 03 will not be transformed by this rule.

  • "^OriginalProject\\\\Path2": "TargetProject\\YetAnotherPath\\Path2",

    In an iteration path, OriginalProject\Path2 will be replaced by TargetProject\YetAnotherPath\Path2.

  • "^OriginalProject\\\\(DescopeThis|DescopeThat)": "TargetProject\\Archive\\Descoped\\",

    In an area path, OriginalProject\ found at the beginning of the path, when followed by either DescopeThis or DescopeThat will be replaced by TargetProject\Archive\Descoped\.

    OriginalProject\DescopeThis\Area will be transformed to TargetProject\Archive\Descoped\DescopeThis\Area. OriginalProject\DescopeThat\Product will be transformed to TargetProject\Archive\Descoped\DescopeThat\Product.

  • "^OriginalProject\\\\(?!DescopeThis|DescopeThat)": "TargetProject\\NewArea\\",

    In an area path, OriginalProject\ found at the beginning of the path will be replaced by TargetProject\NewArea\ unless it is followed by DescopeThis or DescopeThat.

    OriginalProject\ValidArea\ would be replaced by TargetProject\NewArea\ValidArea\ but OriginalProject\DescopeThis would not be modified by this rule.

«««< HEAD

PrefixProjectToNodes

The PrefixProjectToNodes was an option that was used to prepend the source project name to the target set of nodes. This was super valuable when the target Project already has nodes and you dont want to merge them all together. This is now replaced by the AreaMaps and IterationMaps options.

"IterationMaps": {
  "^SourceServer\\\\(.*)" , "TargetServer\\SourceServer\\$1",
},
"AreaMaps": {
   "^SourceServer\\\\(.*)" , "TargetServer\\SourceServer\\$1",
}

=======

origin/master

More Complex Regex

Before your migration starts it will validate that all of the Areas and Iterations from the Source work items revisions exist on the Target. Any that do not exist will be flagged in the logs and if and the migration will stop just after it outputs a list of the missing nodes.

Our algorithm that converts the Source nodes to Target nodes processes the mappings at that time. This means that any valid mapped nodes will never be caught by the This path is not anchored in the source project message as they are already altered to be valid.

We recently updated the logging for this part of the system to more easily debug both your mappings and to see what they system is doing with the nodes and their current state. You can set "LogLevel": "Debug" to see the details.

To add a mapping, you can follow the documentation with this being the simplest way:

"IterationMaps": {
  "WorkItemMovedFromProjectName\\\\Iteration 1": "TargetProject\\Sprint 1",
},
"AreaMaps": {
   "WorkItemMovedFromProjectName\\\\Team 2": "TargetProject\\ProductA\\Team 2",
}

Or you can use regular expressions to match the missing area or iteration paths:

"IterationMaps": {
  "^OriginalProject\\\\Path1(?=\\\\Sprint 2022)": "TargetProject\\AnotherPath\\NewTeam",
  "^OriginalProject\\\\Path1(?=\\\\Sprint 2020)": "TargetProject\\AnotherPath\\Archives\\Sprints 2020",
  "^OriginalProject\\\\Path2": "TargetProject\\YetAnotherPath\\Path2",
},
"AreaMaps": {
  "^OriginalProject\\\\(DescopeThis|DescopeThat)": "TargetProject\\Archive\\Descoped\\",
  "^OriginalProject\\\\(?!DescopeThis|DescopeThat)": "TargetProject\\NewArea\\",
}

If you want to use the matches in the replacement you can use the following:

"IterationMaps": {
  "^\\\\oldproject1(?:\\\\([^\\\\]+))?\\\\([^\\\\]+)$": "TargetProject\\Q1\$2",
}

If the olf iteration path was \oldproject1\Custom Reporting\Sprint 13, then this would result in a match for each Iteration node after the project node. You would then be able to reference any of the nodes using “$” and then the number of the match.

Regular expressions are much more difficult to build and debug so it is a good idea to use a regular expression tester to check that you are matching the right things and to build them in ChatGTP.

NOTE: You need \\ to escape a \ the pattern, and \\ to escape a \ in JSON. Therefor on the left of the match you need 4 \ to represent the \\ for the pattern and only 2 \ in the match

image

Example with PrefixProjectToNodes

This will prepend a bucket to the area and iteration paths. This is useful when you want to keep the original paths but also want to be able to identify them as being from the original project.


```json
"AreaMaps": {
  "^OriginalProject(?:\\\\([^\\\\]+))?\\\\([^\\\\]+)$": "TargetProject\\BucketForIncommingAreas\$2",
},
"IterationMaps": {
  "^OriginalProject(?:\\\\([^\\\\]+))?\\\\([^\\\\]+)$": "TargetProject\\BucketForIncommingInterations\$2",
}

Example with AreaMaps and IterationMaps

"CommonEnrichersConfig": [
    {
    "$type": "TfsNodeStructureOptions",
    "PrefixProjectToNodes": false,
    "NodeBasePaths": [],
    "AreaMaps": {
      "^Skypoint Cloud$" : "MigrationTest5"
    },
    "IterationMaps": {
      "^Skypoint Cloud\\\\Sprint 1$" : "MigrationTest5\\Sprint 1"
    },
    "ShouldCreateMissingRevisionPaths": true,
    "ReplicateAllExistingNodes":  true
  }
],

NodeBasePath Configuration

The NodeBasePaths entry allows the filtering of the nodes to be replicated on the target projects. To try to explain the correct usage let us assume that we have a source team project SourceProj with the following node structures

  • AreaPath
    • SourceProj
    • SourceProj\Team 1
    • SourceProj\Team 2
    • SourceProj\Team 2\Sub-Area
    • SourceProj\Team 3
  • IterationPath
    • SourceProj
    • SourceProj\Sprint 1
    • SourceProj\Sprint 2
    • SourceProj\Sprint 2\Sub-Iteration
    • SourceProj\Sprint 3

Depending upon what node structures you wish to migrate you would need the following settings. Exclusions are also possible by prefixing a path with an exclamation mark !. Example are

   
Intention Migrate all areas and iterations and all Work Items
NodeBasePath []
Comment The same AreaPath and Iteration Paths are created on the target as on the source. Hence, all migrated WI remain in their existing area and iteration paths
   
Intention Only migrate area path Team 2 and it associated Work Items, but all iteration paths
NodeBasePath ["Team 2", "Sprint"]
Comment Only the area path ending Team 2 will be migrated.
The WIQLQueryBit should be edited to limit the WI migrated to this area path e.g. add AND [System.AreaPath] UNDER 'SampleProject\\Team 2' .
The migrated WI will have an area path of TargetProj\Team 2 but retain their iteration paths matching the sprint name on the source
   
Intention Only migrate iterations structure
NodeBasePath ["Sprint"]
Comment Only the area path ending Team 2 will be migrated
All the iteration paths will be migrated.
The migrated WI will have the default area path of TargetProj as their source area path was not migrated i.e. TargetProj
The migrated WI will have an iteration path match the sprint name on the source
   
Intention Move all WI to the existing area and iteration paths on the targetProj
NodeBasePath ["DUMMY VALUE"]
Comment As the NodeBasePath does not match any source area or iteration path no nodes are migrated.
Migrated WI will be assigned to any matching area or iteration paths. If no matching ones can be found they will default to the respective root values
   
Intention Move the Team 2 area, but not its Sub-Area
NodeBasePath ["Team 2", "!Team 2\\SubArea"]
Comment The Work Items will have to be restricted to the right areas, e.g. with AND [System.AreaPath] UNDER 'SampleProject\\Team 2' AND [System.AreaPath] NOT UNDER 'SampleProject\\Team 2\\Sub-Area', otherwise their migratin will fail
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