Updates graphql tags that are not within an object literal and not standalone expressions to be wrapped in an object similar to what the Relay babel plugin used to do before simplifying the logic there.

fix-graphql.js

'use strict';

// To be used with jscodeshift: https://github.com/facebook/jscodeshift

export default function transformer(file, api) {
  const j = api.jscodeshift;

  if (!file.source.includes('graphql`')) {
    return;
  }

  source = j(source)
    .find(j.TaggedTemplateExpression, {
      tag: {type: 'Identifier', name: 'graphql'},
    })
    .filter(path => getAssignedObjectPropertyName(path) == null)
    .filter(path => path.parentPath.node.type !== 'ExpressionStatement')
    .forEach(path => {
      const text = path.node.quasi.quasis[0].value.raw;
      const fragmentNameMatch = text
        .replace(/#.*/g, '')
        .match(/fragment (\w+)/);
      if (!fragmentNameMatch) {
        return;
      }
      const fragmentName = fragmentNameMatch[1];

      const [, propName] = getFragmentNameParts(fragmentName);

      j(path).replaceWith(
        j.objectExpression([
          j.objectProperty(j.identifier(propName), path.node),
        ]),
      );
    })
    .toSource();

  return source;
}

function getAssignedObjectPropertyName(path) {
  var property = path;
  while (property) {
    if (property.node.type === 'Property' && property.node.key.name) {
      return property.node.key.name;
    }
    property = property.parentPath;
  }
}

function getFragmentNameParts(fragmentName) {
  const match = fragmentName.match(
    /^([a-zA-Z][a-zA-Z0-9]*)(?:_([a-zA-Z][_a-zA-Z0-9]*))?$/,
  );
  if (!match) {
    throw new Error(
      'BabelPluginGraphQL: Fragments should be named ' +
        '`ModuleName_fragmentName`, got `' +
        fragmentName +
        '`.',
    );
  }
  const module = match[1];
  const propName = match[2] || '@nocommit';
  return [module, propName];
}

@sibelius Changing L7 property.node.type === 'Property' -> property.node.type === 'ObjectProperty' fixes it for me.

did the tricky, it solved most of the problems

there was another edge case

where you declare more than one fragment inside the graphql tag

BabelPluginRelay will catch this:

Error: BabelPluginRelay: Expected exactly one fragment in the graphql tag referenced by the property query.

I had the same problem, @sibelius

Thank you so much for sharing this codemod. 👍 It helped me to start with jscodeshift (never used it before) and migrate some components.

I extended it to solve a few more issues specific for the project I'm working on:

1. step1: Transform graphql tag to an object, split multiple fragments, add missing _data suffix to the fragment name:

   // Input:
   graphql`
     fragment Foo {
     }
     fragment Foo_bar {
     }
   `
   // Output:
   {
     data: graphql`
       fragment Foo_data {
       }
     `,
     bar: graphql`
       fragment Foo_bar {
       }
     `,
   }
   

2. step2: Add missing _data to type imports:

   // Input:
   import type { Foo as Data } from './__generated__/Foo.graphql`;
   // Output:
   import type { Foo_data as Data } from './__generated__/Foo_data.graphql`;
   

3. step3: Add missing _data to fragment spreads:

   // Input:
   fragment Foo_data {
     ...Bar
   }
   // Output:
   fragment Foo_data {
     ...Bar_data
   }
   

4. step4: Switch to @kiwicom/relay:

   // Input:
   import { createFragmentContainer, graphql } from 'react-relay';
   // Output:
   import { createFragmentContainer, graphql } from '@kiwicom/relay';
   

The last step is highly opinionated - we're switching to our @kiwicom/relay wrapper mainly for the better Flow type safety.

Here is the changed source:

// @flow
'use strict';
var { Source, parse, print } = require('graphql');

// To be used with jscodeshift: https://github.com/facebook/jscodeshift

export const parser = 'flow';

export default function transformer(file: any, api: any) {
  const j = api.jscodeshift;

  if (!file.source.includes('graphql')) {
    return;
  }

  const step1 = j(file.source)
    .find(j.TaggedTemplateExpression, {
      tag: { type: 'Identifier', name: 'graphql' },
    })
    .filter(path => getAssignedObjectPropertyName(path) == null)
    .filter(path => path.parentPath.node.type !== 'ExpressionStatement')
    .forEach(path => {
      const text = path.node.quasi.quasis[0].value.raw;
      const document = parse(new Source(text));

      if (document.definitions[0].kind !== 'FragmentDefinition') {
        return;
      }

      j(path).replaceWith(
        j.objectExpression(
          document.definitions.map(definition => {
            const originalFragmentName = definition.name.value;
            const fragmentName = originalFragmentName.includes('_')
              ? originalFragmentName
              : `${originalFragmentName}_data`;
            definition.name.value = fragmentName;
            const fixedDefinition = print(definition);
            const propNameMatch = fragmentName.match(/([^_]+)$/);
            const propName = propNameMatch[1];

            return j.objectProperty(
              j.identifier(propName),
              j.taggedTemplateExpression(
                j.identifier('graphql'),
                j.templateLiteral(
                  [
                    j.templateElement(
                      {
                        cooked: fixedDefinition,
                        raw: fixedDefinition,
                      },
                      true,
                    ),
                  ],
                  [],
                ),
              ),
            );
          }),
        ),
      );
    })
    .toSource();

  const step2 = j(step1)
    .find(j.ImportDeclaration)
    .filter(path => {
      let importPath = path.value.source.value;
      if (!importPath.match(/\/__generated__\//)) {
        // not a Relay import
        return false;
      }
      if (importPath.match(/(Query|Mutation|Subscription).graphql$/)) {
        // not a fragment
        return false;
      }
      return true;
    })
    .forEach(path => {
      path.value.specifiers.forEach(specifier => {
        if (!specifier.imported.name.includes('_')) {
          specifier.imported.name += '_data';
        }
      });
      const fixedPath = path.value.source.value.replace(
        /\/([a-zA-Z][a-zA-Z0-9]*)\.graphql$/,
        "/$1_data.graphql",
      );
      path.value.source.value = fixedPath;
    })
    .toSource();

  const step3 = j(step2)
    .find(j.TaggedTemplateExpression, {
      tag: { type: 'Identifier', name: 'graphql' },
    })
    .forEach(path => {
      const text = path.node.quasi.quasis[0].value.raw;
      const fixedText = text.replace(
        /(\.\.\.[a-zA-Z][a-zA-Z0-9]*)(\s)/gm,
        '$1_data$2',
      );
      path.node.quasi.quasis[0].value.raw = fixedText;
    })
    .toSource();

  const step4 = j(step3)
    .find(j.ImportDeclaration)
    .filter(path => {
      return path.value.source.value === 'react-relay';
    })
    .forEach(path => {
      path.value.source.value = '@kiwicom/relay';
    })
    .toSource();

  return step4;
}

function getAssignedObjectPropertyName(path) {
  let property = path;
  while (property) {
    if (property.node.type === 'Property' && property.node.key.name) {
      return property.node.key.name;
    }
    property = property.parentPath;
  }
}

Thank you a lot but The codemod is not useful when we have multiple fragments inside one graphql tag.
I have modified it to support this situation:

// To be used with jscodeshift: https://github.com/facebook/jscodeshift

export default function transformer(file, api) {
    const j = api.jscodeshift;

    if (!file.source.includes('graphql`')) {
      return;
    }

    function getAssignedObjectPropertyName(path) {
        var property = path;
        while (property) {
            if (property.node.type === 'Property' && property.node.key.name) {
                return property.node.key.name;
            }
            property = property.parentPath;
        }
    }

    function getFragmentNameParts(fragmentName) {
        const match = fragmentName.match(
            /^([a-zA-Z][a-zA-Z0-9]*)(?:_([a-zA-Z][_a-zA-Z0-9]*))?$/,
        );
        if (!match) {
            throw new Error(
                'BabelPluginGraphQL: Fragments should be named ' +
                '`ModuleName_fragmentName`, got `' +
                fragmentName +
                '`.',
            );
        }
        const module = match[1];
        const propName = match[2] || "data";
        return [module, propName];
    }

    return j(file.source)
    .find(j.TaggedTemplateExpression, { tag: { type: 'Identifier', name: 'graphql' } })
    .filter(path => getAssignedObjectPropertyName(path) == null)
    .filter(path => path.parentPath.node.type !== 'ExpressionStatement')
    .forEach(path => {
        const text = path.node.quasi.quasis[0].value.raw;
        if (!text.includes('fragment ')) {
          return;
        }

        const fragmentStrings = text.replace(/#.*/g, '')
          .split('fragment ')
          .map(item => item.trim())
          .filter(item => item !== '' && !item.startsWith('query') && !item.startsWith('mutation'))
          .map(item => `fragment ${item}`);

        const expressions = fragmentStrings.map((fragmentString) => {
          const fragmentNameMatch =  fragmentString.match(/fragment\s+(\w+)/);
          if (!fragmentNameMatch) {
            return;
          }

          const fragmentName = fragmentNameMatch[1];
          const [, propName] = getFragmentNameParts(fragmentName);

          const key = j.identifier(propName);
          const value = j.taggedTemplateExpression(
              j.identifier('graphql'),
              j.templateLiteral([
                j.templateElement({ cooked: fragmentString, raw: fragmentString }, true ),
              ], []),
            );

          return j.objectProperty(key, value);
        }).filter(Boolean)

        if (expressions.length > 0) {
          j(path).replaceWith(j.objectExpression(expressions));
        }
    })
    .toSource();
}