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[07-C] [Project Solar / Phase 1 / Engineering Follow-ups] Improve validation for $modes #3397

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[07-C] [Project Solar / Phase 1 / Engineering Follow-ups] Improve validation for $modes #3397

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b5dc44c
added `chalk` as devDependency
didoo Dec 2, 2025
ce89515
updated `build.ts` script for design tokens, to have validation of ex…
didoo Dec 2, 2025
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1 change: 1 addition & 0 deletions packages/tokens/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@
"@types/tinycolor2": "^1.4.6",
"@typescript-eslint/eslint-plugin": "^8.18.1",
"@typescript-eslint/parser": "^8.18.1",
"chalk": "^5.4.1",
"eslint": "^8.57.1",
"fs-extra": "^11.2.0",
"lodash-es": "^4.17.21",
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9 changes: 7 additions & 2 deletions packages/tokens/scripts/build.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ import StyleDictionary from 'style-dictionary';
import type { DesignToken, PlatformConfig } from 'style-dictionary/types';

import tinycolor from 'tinycolor2';
import chalk from 'chalk';

import fs from 'fs-extra';
import path from 'path';
Expand Down Expand Up @@ -42,10 +43,14 @@ for (const mode of modes) {
function replaceModes(slice: DesignToken) {
if (slice.$modes) {
if (mode in slice.$modes) {
// extra validation to catch instances where the `default` mode value is different from the `$value`
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@KristinLBradley KristinLBradley Dec 2, 2025

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Using file: packages/tokens/src/products/shared/typography.json

On line 158, I tested changing the font-weight regular $value to "900" so that it no longer matched the $modes default value of "400" then ran pnpm build.

I saw a warning as expected, but it was repeated twice:

Processing mode "default"...
⚠️ WARNING - Found themed 'default' token with value different than '$value' (`400` instead of the expected `900`) - File: src/products/shared/typography.json
⚠️ WARNING - Found themed 'default' token with value different than '$value' (`400` instead of the expected `900`) - File: src/products/shared/typography.json

I tested again, changing another value and was also seeing a duplicated warning.

if (mode === 'default' && slice.$modes[mode] !== slice.$value) {
console.warn(`⚠️ ${chalk.yellow.bold('WARNING')} - Found themed 'default' token with value different than '$value' (\`${slice.$modes[mode]}\` instead of the expected \`${slice.$value}\`) - File: ${slice.filePath}`);
}
slice.$value = slice.$modes[mode];
} else {
// TODO! decide if we want to throw here (and test if it works, by removing a value from one of the test files) - see: https://hashicorp.atlassian.net/browse/HDS-5668
console.error(`❌ ERROR - Found themed token without '${mode}' value:`, JSON.stringify(slice, null, 2));
// we want to interrupt the execution of the script if one of the expected modes is missing
throw new Error(`❌ ${chalk.red.bold('ERROR')} - Found themed token without '${mode}' value - ${JSON.stringify(slice, null, 2)}`);
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@KristinLBradley KristinLBradley Dec 2, 2025

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Using file: packages/tokens/src/products/shared/typography.json

I tried deleting one of the $modes entries and ran pnpm build and received an error as expected.

Processing mode "cds-g0"...
/Users/kristinbradley/dev/design-system/packages/tokens/scripts/build.ts:53
            throw new Error(`❌ ${chalk.red.bold('ERROR')} - Found themed token without '${mode}' value - ${JSON.stringify(slice, null, 2)}`);
                  ^

Error: ❌ ERROR - Found themed token without 'cds-g0' value - {
  "$type": "font-family",
  "$value": "{typography.font-stack.monospace.code.combined}",
  "$modes": {
    "default": "{typography.font-stack.monospace.code.combined}",
    "cds-g10": "{carbon.typography.font-family.mono}",
    "cds-g90": "{carbon.typography.font-family.mono}",
    "cds-g100": "{carbon.typography.font-family.mono}"
  },

}
} else {
Object.values(slice).forEach((value) => {
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72 changes: 13 additions & 59 deletions pnpm-lock.yaml
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