Definition Diffs

[ChrisPenner]

Overview

Adds an endpoint for diffing terms across branches/releases within a project.

Implementation

Example of a common term diff case below, see included transcripts for differing output when for example one definition is a builtin and the other is user-defined, or for type-diffs.

// Common case, diffing two user-defined terms:

/GET /users/<handle>/projects/<project-slug>/diff/terms?oldBranchRef=<branch-ref>&newBranchRef=<branch-ref>&oldTerm=<fqn>&newTerm=<fqn>

{
    "diff": {
      "contents": [
        {
          "diffTag": "old",
          "elements": [
            {
              "annotation": {
                "contents": "beforeTerm",
                "tag": "HashQualifier"
              },
              "segment": "beforeTerm"
            }
          ]
        },
        {
          "diffTag": "new",
          "elements": [
            {
              "annotation": {
                "contents": "afterTerm",
                "tag": "HashQualifier"
              },
              "segment": "afterTerm"
            }
          ]
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": {
                "tag": "TypeAscriptionColon"
              },
              "segment": " :"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "contents": "##Nat",
                "tag": "TypeReference"
              },
              "segment": "Nat"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "TypeOperator"
              },
              "segment": "->"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "contents": "##Nat",
                "tag": "TypeReference"
              },
              "segment": "Nat"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "TypeOperator"
              },
              "segment": "->"
            },
            {
              "annotation": null,
              "segment": " "
            }
          ]
        },
        {
          "diffTag": "new",
          "elements": [
            {
              "annotation": {
                "contents": "##Nat",
                "tag": "TypeReference"
              },
              "segment": "Nat"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "TypeOperator"
              },
              "segment": "->"
            },
            {
              "annotation": null,
              "segment": " "
            }
          ]
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": {
                "tag": "DelayForceChar"
              },
              "segment": "'"
            },
            {
              "annotation": {
                "contents": "##Nat",
                "tag": "TypeReference"
              },
              "segment": "Nat"
            },
            {
              "annotation": null,
              "segment": "\n"
            }
          ]
        },
        {
          "diffTag": "old",
          "elements": [
            {
              "annotation": {
                "contents": "beforeTerm",
                "tag": "HashQualifier"
              },
              "segment": "beforeTerm"
            }
          ]
        },
        {
          "diffTag": "new",
          "elements": [
            {
              "annotation": {
                "contents": "afterTerm",
                "tag": "HashQualifier"
              },
              "segment": "afterTerm"
            }
          ]
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "x"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "y"
            }
          ]
        },
        {
          "diffTag": "new",
          "elements": [
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "z"
            }
          ]
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": {
                "tag": "BindingEquals"
              },
              "segment": " ="
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "ControlKeyword"
              },
              "segment": "do"
            },
            {
              "annotation": null,
              "segment": "\n"
            },
            {
              "annotation": null,
              "segment": "  "
            },
            {
              "annotation": {
                "tag": "UseKeyword"
              },
              "segment": "use "
            },
            {
              "annotation": {
                "tag": "UsePrefix"
              },
              "segment": "Nat"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "UseSuffix"
              },
              "segment": "+"
            },
            {
              "annotation": null,
              "segment": "\n"
            },
            {
              "annotation": null,
              "segment": "  "
            },
            {
              "annotation": {
                "contents": "myList",
                "tag": "HashQualifier"
              },
              "segment": "myList"
            },
            {
              "annotation": {
                "tag": "BindingEquals"
              },
              "segment": " ="
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "contents": "##Sequence",
                "tag": "TypeReference"
              },
              "segment": "["
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "x"
            },
            {
              "annotation": {
                "contents": "##Sequence",
                "tag": "TypeReference"
              },
              "segment": ", "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "y"
            },
            {
              "annotation": {
                "contents": "##Sequence",
                "tag": "TypeReference"
              },
              "segment": ", "
            }
          ]
        },
        {
          "diffTag": "annotationChange",
          "fromAnnotation": {
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            "tag": "TermReference"
          },
          "segment": "valueChangesButNameStaysSame",
          "toAnnotation": {
            "contents": "#gjmq673r1vrurfotlnirv7vutdhm6sa3s02em5g22kk606mv6duvv8be402dv79312i4a0onepq5bo7citsodvq2g720nttj0ee9p0g",
            "tag": "TermReference"
          }
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": {
                "contents": "##Sequence",
                "tag": "TypeReference"
              },
              "segment": ", "
            }
          ]
        },
        {
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            "tag": "TermReference"
          },
          "diffTag": "segmentChange",
          "fromSegment": "nameChangesButValueStaysSame",
          "toSegment": "changedNameWithSameValue"
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": {
                "contents": "##Sequence",
                "tag": "TypeReference"
              },
              "segment": "]"
            },
            {
              "annotation": null,
              "segment": "\n"
            },
            {
              "annotation": null,
              "segment": "  "
            },
            {
              "annotation": {
                "contents": "myList2",
                "tag": "HashQualifier"
              },
              "segment": "myList2"
            },
            {
              "annotation": {
                "tag": "BindingEquals"
              },
              "segment": " ="
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "contents": "#6frvp5jfjtt7odi9769i0p5phuuuij1fi1d9l5ncpelh416ab3vceaphhaijh0ct0v9n793j7e4h78687oij6ai97085u63m264gj5o",
                "tag": "TermReference"
              },
              "segment": "List.map"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Parenthesis"
              },
              "segment": "("
            },
            {
              "annotation": null,
              "segment": "x"
            },
            {
              "annotation": {
                "tag": "ControlKeyword"
              },
              "segment": " ->"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "x"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "contents": "##Nat.+",
                "tag": "TermReference"
              },
              "segment": "+"
            },
            {
              "annotation": null,
              "segment": " "
            }
          ]
        },
        {
          "diffTag": "old",
          "elements": [
            {
              "annotation": {
                "tag": "NumericLiteral"
              },
              "segment": "1"
            }
          ]
        },
        {
          "diffTag": "new",
          "elements": [
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "z"
            }
          ]
        },
        {
          "diffTag": "both",
          "elements": [
            {
              "annotation": {
                "tag": "Parenthesis"
              },
              "segment": ")"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "myList"
            },
            {
              "annotation": null,
              "segment": "\n"
            },
            {
              "annotation": null,
              "segment": "  "
            },
            {
              "annotation": {
                "contents": "##List.size",
                "tag": "TermReference"
              },
              "segment": "List.size"
            },
            {
              "annotation": null,
              "segment": " "
            },
            {
              "annotation": {
                "tag": "Var"
              },
              "segment": "myList2"
            }
          ]
        }
      ],
      "tag": "UserObject"
    },
    "diffKind": "diff",
    "newBranchRef": "after",
    "newTerm": {
      "bestTermName": "afterTerm",
      "defnTermTag": "Plain",
      "signature": [
        {
          "annotation": {
            "contents": "##Nat",
            "tag": "TypeReference"
          },
          "segment": "Nat"
        },
        {
          "annotation": null,
          "segment": " "
        },
        {
          "annotation": {
            "tag": "TypeOperator"
          },
          "segment": "->"
        },
        {
          "annotation": null,
          "segment": " "
        },
        {
          "annotation": {
            "contents": "##Nat",
            "tag": "TypeReference"
          },
          "segment": "Nat"
        },
        {
          "annotation": null,
          "segment": " "
        },
        {
          "annotation": {
            "tag": "TypeOperator"
          },
          "segment": "->"
        },
        {
          "annotation": null,
          "segment": " "
        },
        {
          "annotation": {
            "contents": "##Nat",
            "tag": "TypeReference"
          },
          "segment": "Nat"
        },
        {
          "annotation": null,
          "segment": " "
        },
        {
          "annotation": {
            "tag": "TypeOperator"
          },
          "segment": "->"
        },
        {
          "annotation": null,
          "segment": " "
        },
        {
          "annotation": {
            "tag": "DelayForceChar"
          },
          "segment": "'"
        },
        {
          "annotation": {
            "contents": "##Nat",
            "tag": "TypeReference"
          },
          "segment": "Nat"
        }
      ],
      "termDefinition": {
        "contents": [
          {
            "annotation": {
              "contents": "afterTerm",
              "tag": "HashQualifier"
            },
            "segment": "afterTerm"
          },
          {
            "annotation": {
              "tag": "TypeAscriptionColon"
            },
            "segment": " :"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "contents": "##Nat",
              "tag": "TypeReference"
            },
            "segment": "Nat"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "TypeOperator"
            },
            "segment": "->"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "contents": "##Nat",
              "tag": "TypeReference"
            },
            "segment": "Nat"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "TypeOperator"
            },
            "segment": "->"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "contents": "##Nat",
              "tag": "TypeReference"
            },
            "segment": "Nat"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "TypeOperator"
            },
            "segment": "->"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "DelayForceChar"
            },
            "segment": "'"
          },
          {
            "annotation": {
              "contents": "##Nat",
              "tag": "TypeReference"
            },
            "segment": "Nat"
          },
          {
            "annotation": null,
            "segment": "\n"
          },
          {
            "annotation": {
              "contents": "afterTerm",
              "tag": "HashQualifier"
            },
            "segment": "afterTerm"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "Var"
            },
            "segment": "x"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "Var"
            },
            "segment": "y"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "Var"
            },
            "segment": "z"
          },
          {
            "annotation": {
              "tag": "BindingEquals"
            },
            "segment": " ="
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "ControlKeyword"
            },
            "segment": "do"
          },
          {
            "annotation": null,
            "segment": "\n"
          },
          {
            "annotation": null,
            "segment": "  "
          },
          {
            "annotation": {
              "tag": "UseKeyword"
            },
            "segment": "use "
          },
          {
            "annotation": {
              "tag": "UsePrefix"
            },
            "segment": "Nat"
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "tag": "UseSuffix"
            },
            "segment": "+"
          },
          {
            "annotation": null,
            "segment": "\n"
          },
          {
            "annotation": null,
            "segment": "  "
          },
          {
            "annotation": {
              "contents": "myList",
              "tag": "HashQualifier"
            },
            "segment": "myList"
          },
          {
            "annotation": {
              "tag": "BindingEquals"
            },
            "segment": " ="
          },
          {
            "annotation": null,
            "segment": " "
          },
          {
            "annotation": {
              "contents": "##Sequence",
              "tag": "TypeReference"
            },
            "segment": "["
          },
          {
            "annotation": {
              "tag": "Var"
            },
            "segment": "x"
          },
          {
            "annotation": {
              "contents": "##Sequence",
              "tag": "TypeReference"
            },
            "segment": ", "
          },
          {
            "annotation": {
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            },
            "segment": "y"
          },
          {
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              "contents": "##Sequence",
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            },
            "segment": ", "
          },
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              "tag": "TermReference"
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            "segment": "valueChangesButNameStaysSame"
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            "segment": "changedNameWithSameValue"
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            },
            "segment": "]"
          },
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            "annotation": null,
            "segment": "\n"
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            "segment": "  "
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              "tag": "HashQualifier"
            },
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            "segment": " ="
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            "segment": "List.map"
          },
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            "segment": " "
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            },
            "segment": "("
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            "segment": " ->"
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            "annotation": {
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            },
            "segment": "x"
          },
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            "segment": " "
          },
          {
            "annotation": {
              "contents": "##Nat.+",
              "tag": "TermReference"
            },
            "segment": "+"
          },
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            "segment": " "
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            "annotation": {
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            "segment": ")"
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            "segment": " "
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            "segment": "myList"
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            "segment": "\n"
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            "segment": "  "
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              "tag": "TermReference"
            },
            "segment": "List.size"
          },
          {
            "annotation": null,
            "segment": " "
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      ]
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            "segment": "do"
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