chore: adapt strategy to pick the commit from the user defined one

apps/backend/src/build/strategy/strategies/ci/index.ts

@@ -75,6 +75,7 @@ async function getBaseScreenshotBucket(build: Build) {
     ctx,
     base,
     head,
+    build,
   });
 
   if (!mergeBaseCommitSha) {

apps/backend/src/build/strategy/strategies/ci/strategies/github.ts

@@ -1,6 +1,10 @@
 import { invariant } from "@argos/util/invariant";
 
-import { GithubRepository, Project } from "@/database/models/index.js";
+import {
+  GithubInstallation,
+  GithubRepository,
+  Project,
+} from "@/database/models/index.js";
 import { checkErrorStatus, getInstallationOctokit } from "@/github/index.js";
 import { UnretryableError } from "@/job-core/index.js";
 
@@ -12,6 +16,7 @@ export const GithubStrategy: MergeBaseStrategy<{
   octokit: Octokit;
   owner: string;
   repo: string;
+  installation: GithubInstallation;
 }> = {
   detect: (project: Project) => Boolean(project.githubRepositoryId),
   getContext: async (project: Project) => {
@@ -52,6 +57,11 @@ export const GithubStrategy: MergeBaseStrategy<{
   },
 
   getMergeBaseCommitSha: async (args) => {
+    // If the app is light, then we rely on the reference commit provided by the user in CLI.
+    if (args.ctx.installation.app === "light") {
+      return args.build.referenceCommit;
+    }
+
     try {
       const { data } =
         await args.ctx.octokit.rest.repos.compareCommitsWithBasehead({

apps/backend/src/build/strategy/strategies/ci/types.ts

@@ -1,4 +1,4 @@
-import type { Project } from "@/database/models/index.js";
+import type { Build, Project } from "@/database/models/index.js";
 
 export type MergeBaseStrategy<TCtx> = {
   detect: (project: Project) => Promise<boolean> | boolean;
@@ -8,6 +8,7 @@ export type MergeBaseStrategy<TCtx> = {
     ctx: TCtx;
     base: string;
     head: string;
+    build: Build;
   }) => Promise<string | null>;
   listParentCommitShas: (args: {
     project: Project;