@npio/cli/src/util.ts

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import prismaInternals from "@prisma/internals";
import { readFile, readdir } from "fs/promises";
import { getSchemaRootDir } from "nitropage/internals";
import { join } from "path";

const datasourceRegex = /datasource \S+ {/;

const getSchemaPath = async () => {
  const rootDir = getSchemaRootDir();

  const items = await readdir(rootDir);
  for (const item of items) {
    if (!item.endsWith(".prisma")) {
      continue;
    }

    const itemPath = join(rootDir, item);
    const contents = await readFile(itemPath, "utf-8");
    if (contents.match(datasourceRegex)) {
      return itemPath;
    }
  }

  throw new Error("Unable to find prisma schema file");
};

export const getDatabaseProvider = async () => {
  const { getConfig: getPrismaConfig } = prismaInternals;
  const schemaPath = await getSchemaPath();
  let mainSchema = await readFile(schemaPath, { encoding: "utf8" });

  const schemaConfig = await getPrismaConfig({
    datamodel: mainSchema,
    ignoreEnvVarErrors: true,
  });

  const provider = schemaConfig.datasources[0]?.provider || "sqlite";

  return provider;
};