[ENG-13252][eas-cli] resolve default environment automatically based …

…on build configuration (#2644)

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# Why

https://exponent-internal.slack.com/archives/C06FK950085/p1729212611408479?thread_ts=1729186741.835629&cid=C06FK950085

# How

Resolve the default (if not set in the build profile) `environment` to use for a build based on its configuration.

Store build -> `production`
Dev client -> `development`
Other (`internal`) -> `preview`

# Test Plan

Test manually

CHANGELOG.md

@@ -11,6 +11,8 @@ This is the log of notable changes to EAS CLI and related packages.
 - Calculate fingerprint on each update. ([#2687](https://github.com/expo/eas-cli/pull/2687) by [@quinlanj](https://github.com/quinlanj))
 - Calculate fingerprint on each update republish. ([#2708](https://github.com/expo/eas-cli/pull/2708) by [@quinlanj](https://github.com/quinlanj))
 - Add `eas env` commands. ([#2711](https://github.com/expo/eas-cli/pull/2711) by [@szdziedzic](https://github.com/szdziedzic))
+- Add `--environment` flag to `eas update` command. ([#2711](https://github.com/expo/eas-cli/pull/2711) by [@szdziedzic](https://github.com/szdziedzic))
+- Load readable environment variables from EAS servers on every build. ([#2644](https://github.com/expo/eas-cli/pull/2644) by [@szdziedzic](https://github.com/szdziedzic))
 
 ### 🐛 Bug fixes
 

packages/eas-cli/src/build/evaluateConfigWithEnvVarsAsync.ts

@@ -54,9 +54,10 @@ async function resolveEnvVarsAsync({
   projectId: string;
 }): Promise<Env> {
   const environment =
-    buildProfile.environment?.toUpperCase() ?? process.env.EAS_CURRENT_ENVIRONMENT;
+    buildProfile.environment?.toUpperCase() ??
+    resolveSuggestedEnvironmentForBuildProfileConfiguration(buildProfile);
 
-  if (!environment || !isEnvironment(environment)) {
+  if (!isEnvironment(environment)) {
     Log.log(
       `Loaded "env" configuration for the "${buildProfileName}" profile: ${
         buildProfile.env && Object.keys(buildProfile.env).length > 0
@@ -130,3 +131,27 @@ async function resolveEnvVarsAsync({
     return { ...buildProfile.env };
   }
 }
+
+function resolveSuggestedEnvironmentForBuildProfileConfiguration(
+  buildProfile: BuildProfile
+): EnvironmentVariableEnvironment {
+  const setEnvironmentMessage =
+    'Set the "environment" field in the build profile if you want to specify the environment manually.';
+  if (buildProfile.distribution === 'store') {
+    Log.log(
+      `We detected that you are building for the "store" distribution. Resolving the environment for environment variables used during the build to "production". ${setEnvironmentMessage}`
+    );
+    return EnvironmentVariableEnvironment.Production;
+  } else {
+    if (buildProfile.developmentClient) {
+      Log.log(
+        `We detected that you are building the development client. Resolving the environment for environment variables used during the build to "development". ${setEnvironmentMessage}`
+      );
+      return EnvironmentVariableEnvironment.Development;
+    }
+    Log.log(
+      `We detected that you are building for the "internal" distribution. Resolving the environment for environment variables used during the build to "preview". ${setEnvironmentMessage}`
+    );
+    return EnvironmentVariableEnvironment.Preview;
+  }
+}