Added a new CHROMATIC_DEFAULT_BRANCH option

.changeset/chatty-moose-crash.md

@@ -0,0 +1,5 @@
+---
+"@workleap/chromado": minor
+---
+
+Added a new CHROMATIC_DEFAULT_BRANCH option to configure the name of the repository default branch.

docs/available-options.md

@@ -53,3 +53,18 @@ Add the `CHROMATIC_DISABLE_TURBOSNAP` environment variable to your `chromatic.ym
 !!!info
 We strongly encourage using TurboSnap as Chromatic snapshots are not cheap.
 !!!
+
+## CHROMATIC_DEFAULT_BRANCH
+
+If your repository default branch is not `main`, using this option to provide the name of your repository default branch:
+
+```yaml !#8 chromatic.yml
+- task: CmdLine@2
+  displayName: Chromatic
+  inputs:
+    script: pnpm dlx @workleap/chromado
+  env:
+    CHROMATIC_PROJECT_TOKEN: $(CHROMATIC_PROJECT_TOKEN)
+    CHROMATIC_PULL_REQUEST_COMMENT_ACCESS_TOKEN: $(PULL_REQUEST_COMMENT_ACCESS_TOKEN)
+    CHROMATIC_DEFAULT_BRANCH: master
+```

src/bin.ts

@@ -41,14 +41,17 @@ async function run() {
             argv.push("--only-changed");
         }
 
-        // Accepting the baseline automatically when Chromatic is executed on the "main" branch.
-        // Running Chromatic on the "main" branch allow us to use "squash" merge for PRs, see: https://www.chromatic.com/docs/custom-ci-provider/#squashrebase-merge-and-the-main-branch.
+        // Accepting the baseline automatically when Chromatic is executed on the default branch.
+        // Running Chromatic on the default branch allow us to use "squash" merge for PRs, see: https://www.chromatic.com/docs/custom-ci-provider/#squashrebase-merge-and-the-main-branch.
         // Furthermore, changes from PR doesn't seem to be updating the baseline at all but I don't know why, it seems like a bug with ADO (but according to Chromatic customers support it's normal).
         const isAutoAcceptingChangesOnMainBranch = getVariable("Build.Reason") !== "PullRequest" && getVariable("Build.SourceBranch") === "refs/heads/main";
 
         if (isAutoAcceptingChangesOnMainBranch) {
-            // The second arg restrict the changes to be auto accepted only for the "main" branch.
-            argv.push("--auto-accept-changes", "main");
+            // Defaults to "main" but is configurable becase we have a few repos still using "master" as de the default branch.
+            const defaultBranch = getVariable("CHROMATIC_DEFAULT_BRANCH") ?? "main";
+
+            // The second arg restrict the changes to be auto accepted only for the default branch.
+            argv.push("--auto-accept-changes", defaultBranch);
         }
 
         // Add default branch paths to ignore.