|
| 1 | +# 315 - Json Config Merger |
| 2 | + |
| 3 | +```rig |
| 4 | +import { agent, p, s, defineTool, repair } from "rig"; |
| 5 | +
|
| 6 | +// Agent role: deeply merge two JSON config files and write the result to an output path. |
| 7 | +const jsonConfigMerger = agent({ |
| 8 | + model: "small", |
| 9 | + input: s.object({ |
| 10 | + baseConfig: s.path, |
| 11 | + overrideConfig: s.path, |
| 12 | + outputPath: s.path, |
| 13 | + }), |
| 14 | + instructions: p`You are a JSON config merger. |
| 15 | +
|
| 16 | +Base config contents: |
| 17 | +${p.readInput("baseConfig")} |
| 18 | +
|
| 19 | +Override config contents: |
| 20 | +${p.readInput("overrideConfig")} |
| 21 | +
|
| 22 | +Use the mergeJsonObjects tool to deeply merge the override config into the base config. |
| 23 | +Then write the merged result to ${p.writeInput("outputPath", "mergedContent")}. |
| 24 | +Return the declared output.`, |
| 25 | + tools: [ |
| 26 | + defineTool("mergeJsonObjects", { |
| 27 | + description: "Deep merge two JSON strings, returning the merged JSON and counts of added/overridden keys", |
| 28 | + parameters: s.object({ |
| 29 | + baseJson: s.string, |
| 30 | + overrideJson: s.string, |
| 31 | + }), |
| 32 | + handler({ baseJson, overrideJson }) { |
| 33 | + const base = JSON.parse(baseJson) as Record<string, unknown>; |
| 34 | + const override = JSON.parse(overrideJson) as Record<string, unknown>; |
| 35 | + let keysAdded = 0; |
| 36 | + let keysOverridden = 0; |
| 37 | + function deepMerge( |
| 38 | + target: Record<string, unknown>, |
| 39 | + source: Record<string, unknown> |
| 40 | + ): Record<string, unknown> { |
| 41 | + const result = { ...target }; |
| 42 | + for (const [key, value] of Object.entries(source)) { |
| 43 | + if (key in result) { |
| 44 | + if ( |
| 45 | + typeof result[key] === "object" && |
| 46 | + result[key] !== null && |
| 47 | + typeof value === "object" && |
| 48 | + value !== null |
| 49 | + ) { |
| 50 | + result[key] = deepMerge( |
| 51 | + result[key] as Record<string, unknown>, |
| 52 | + value as Record<string, unknown> |
| 53 | + ); |
| 54 | + } else { |
| 55 | + result[key] = value; |
| 56 | + keysOverridden++; |
| 57 | + } |
| 58 | + } else { |
| 59 | + result[key] = value; |
| 60 | + keysAdded++; |
| 61 | + } |
| 62 | + } |
| 63 | + return result; |
| 64 | + } |
| 65 | + const merged = deepMerge(base, override); |
| 66 | + return { |
| 67 | + mergedJson: JSON.stringify(merged, null, 2), |
| 68 | + keysAdded, |
| 69 | + keysOverridden, |
| 70 | + totalKeys: Object.keys(merged).length, |
| 71 | + }; |
| 72 | + }, |
| 73 | + }), |
| 74 | + ], |
| 75 | + output: s.object({ |
| 76 | + keysAdded: s.int, |
| 77 | + keysOverridden: s.int, |
| 78 | + totalKeys: s.int, |
| 79 | + outputPath: s.path, |
| 80 | + }), |
| 81 | + addons: [repair()], |
| 82 | +}); |
| 83 | +
|
| 84 | +export default jsonConfigMerger; |
| 85 | +``` |
0 commit comments