From f88af9c3f94ed1de49b87e70b623963030717d3a Mon Sep 17 00:00:00 2001
From: Felipe Knorr Kuhn <100320+knorrium@users.noreply.github.com>
Date: Wed, 23 Mar 2022 12:16:21 -0700
Subject: [PATCH 1/4] Add the DOCKER_COMMIT_HASH env var to the backend
 Dockerfile

---
 docker/backend/Dockerfile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index ceddc9000..c013fc23a 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -1,5 +1,8 @@
 FROM node:16.10.0-buster-slim AS builder
 
+ARG commitHash
+ENV DOCKER_COMMIT_HASH=${commitHash}
+
 WORKDIR /build
 COPY . .
 

From 4bb6f499504f160079ff64e7c15e3075262b1b7d Mon Sep 17 00:00:00 2001
From: Felipe Knorr Kuhn <100320+knorrium@users.noreply.github.com>
Date: Wed, 23 Mar 2022 12:17:23 -0700
Subject: [PATCH 2/4] Copy the git commit hash logic to the backend

---
 backend/src/api/backend-info.ts | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/backend/src/api/backend-info.ts b/backend/src/api/backend-info.ts
index 5a556ef18..3dde6ea47 100644
--- a/backend/src/api/backend-info.ts
+++ b/backend/src/api/backend-info.ts
@@ -2,6 +2,7 @@ import * as fs from 'fs';
 import * as os from 'os';
 import logger from '../logger';
 import { IBackendInfo } from '../mempool.interfaces';
+const { spawnSync } = require('child_process');
 
 class BackendInfo {
   private gitCommitHash = '';
@@ -27,10 +28,24 @@ class BackendInfo {
   }
 
   private setLatestCommitHash(): void {
-    try {
-      this.gitCommitHash = fs.readFileSync('../.git/refs/heads/master').toString().trim();
-    } catch (e) {
-      logger.err('Could not load git commit info: ' + (e instanceof Error ? e.message : e));
+    //TODO: share this logic with `generate-config.js`
+    if (process.env.DOCKER_COMMIT_HASH) {
+      this.gitCommitHash = process.env.DOCKER_COMMIT_HASH;
+    } else {
+      try {
+        const gitRevParse = spawnSync('git', ['rev-parse', '--short', 'HEAD']);
+
+        if (!gitRevParse.error) {
+          this.gitCommitHash = gitRevParse.stdout.toString('utf-8').replace(/[\n\r\s]+$/, '');
+          console.log(`mempool revision ${this.gitCommitHash}`);
+        } else if (gitRevParse.error.code === 'ENOENT') {
+          console.log('git not found, cannot parse git hash');
+          this.gitCommitHash = '?';
+        }
+      } catch (e: any) {
+        console.log('Could not load git commit info: ' + e.message);
+        this.gitCommitHash = '?';
+      }
     }
   }
 

From 230fbdbc8ea739f5ca26c430a47ca014b919917c Mon Sep 17 00:00:00 2001
From: Felipe Knorr Kuhn <100320+knorrium@users.noreply.github.com>
Date: Wed, 23 Mar 2022 12:33:15 -0700
Subject: [PATCH 3/4] Fix empty revision case

---
 backend/src/api/backend-info.ts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/backend/src/api/backend-info.ts b/backend/src/api/backend-info.ts
index 3dde6ea47..d98675671 100644
--- a/backend/src/api/backend-info.ts
+++ b/backend/src/api/backend-info.ts
@@ -34,10 +34,9 @@ class BackendInfo {
     } else {
       try {
         const gitRevParse = spawnSync('git', ['rev-parse', '--short', 'HEAD']);
-
         if (!gitRevParse.error) {
-          this.gitCommitHash = gitRevParse.stdout.toString('utf-8').replace(/[\n\r\s]+$/, '');
-          console.log(`mempool revision ${this.gitCommitHash}`);
+          const output = gitRevParse.stdout.toString('utf-8').replace(/[\n\r\s]+$/, '');
+          this.gitCommitHash = output ? output : '?';
         } else if (gitRevParse.error.code === 'ENOENT') {
           console.log('git not found, cannot parse git hash');
           this.gitCommitHash = '?';

From 9c3fc9f75a23ca99fdee2f632ec8718e702640b3 Mon Sep 17 00:00:00 2001
From: Felipe Knorr Kuhn <100320+knorrium@users.noreply.github.com>
Date: Wed, 23 Mar 2022 12:33:47 -0700
Subject: [PATCH 4/4] Update frontend git commit hash logic

---
 frontend/generate-config.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/frontend/generate-config.js b/frontend/generate-config.js
index 617ab3c0e..1f37953b7 100644
--- a/frontend/generate-config.js
+++ b/frontend/generate-config.js
@@ -51,9 +51,9 @@ if (process.env.DOCKER_COMMIT_HASH) {
 } else {
   try {
     const gitRevParse = spawnSync('git', ['rev-parse', '--short', 'HEAD']);
-  
     if (!gitRevParse.error) {
-      gitCommitHash = gitRevParse.stdout.toString('utf-8').replace(/[\n\r\s]+$/, '');
+      const output = gitRevParse.stdout.toString('utf-8').replace(/[\n\r\s]+$/, '');
+      gitCommitHash = output ? output : '?';
       console.log(`mempool revision ${gitCommitHash}`);
     } else if (gitRevParse.error.code === 'ENOENT') {
       console.log('git not found, cannot parse git hash');