From 1b630d2c9bdd97e30d0b302997ff6c9f2c800d98 Mon Sep 17 00:00:00 2001
From: Luze26 <yann.uzel@gmail.com>
Date: Thu, 23 May 2024 20:17:11 +0200
Subject: [PATCH] Fix getFlowVersion (#235)

---
 .changeset/nasty-otters-chew.md |  5 +++++
 src/utils.js                    | 14 ++++++++++++--
 2 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/nasty-otters-chew.md

diff --git a/.changeset/nasty-otters-chew.md b/.changeset/nasty-otters-chew.md
new file mode 100644
index 0000000..2dcdfdf
--- /dev/null
+++ b/.changeset/nasty-otters-chew.md
@@ -0,0 +1,5 @@
+---
+"@onflow/flow-js-testing": patch
+---
+
+Add fallback for version checking CLI when JSON not supported
diff --git a/src/utils.js b/src/utils.js
index cea4982..80d6832 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -52,8 +52,18 @@ export async function getFlowVersion(flowCommand = "flow") {
           "Could not determine Flow CLI version, please make sure it is installed and available in your PATH"
         )
       } else {
-        const versionStr = JSON.parse(stdout).version
-        const version = semver.parse(versionStr)
+        let versionStr
+        try {
+          versionStr = JSON.parse(stdout).version
+        } catch (error) {
+          // fallback to regex for older versions of the CLI without JSON output
+          const rxResult = /^Version: ([^\s]+)/m.exec(stdout)
+          if (rxResult) {
+            versionStr = rxResult[1]
+          }
+        }
+
+        const version = versionStr ? semver.parse(versionStr) : undefined
         if (!version) {
           reject(`Invalid Flow CLI version string: ${versionStr}`)
         }