From aea537f8e77bd979151889c7fe0d3a2992eb3edd Mon Sep 17 00:00:00 2001
From: Rob Emery <git@mintsoft.net>
Date: Sun, 27 Sep 2026 07:52:26 +0100
Subject: [PATCH] Storing the output of the build in tmp files so we can
 extract the bits we need But we need both main and branch checked out and the
 action can do it for us Pulling the bank occupancy from the map produced by
 sdcc rather than the output of the build as it appears the output number is
 only the maximum size of the banks BANK0 isn't output, but what I'm guessing
 are the consituents for it are

---
 .github/workflows/build.yml | 44 ++++++++++++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 31a94891..b1bfb084 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,6 +5,10 @@ on:
     branches: ['**']
   pull_request:
 
+permissions:
+  contents: read
+  pull-requests: write
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -13,18 +17,48 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
+        with:
+          path: branch
+
+      - uses: actions/checkout@v6
+        with:
+          path: main
+          ref: main
 
       - name: Install dependencies
         run: |
           apt update
           apt install make gcc sdcc xxd python-is-python3 libjson-c-dev zlib1g-dev -y
       - name: Run the host-side unit tests
-        run: make -C test
+        run: cd branch && make -C test
       - name: Check that every machine definition can be compiled
-        run: make machine_check
+        run: cd branch && make machine_check
       - name: Make project (4x2/RTL8372)
-        run: make CI=1 MACHINE="KP_9000_6XHML_X2"
+        run: cd branch && make CI=1 MACHINE="KP_9000_6XHML_X2" && cp output/KP_9000_6XHML_X2/rtlplayground.map /tmp/branch.map
       - name: Make project (8x1/RTL8373)
-        run: make CI=1 MACHINE="KP_9000_9XHML_X_V3_1"
+        run: cd branch && make CI=1 MACHINE="KP_9000_9XHML_X_V3_1"
       - name: Make project with the health instrumentation
-        run: make clean && make CI=1 MACHINE="KP_9000_6XHML_X2" HEALTH=1
+        run: cd branch && make clean && make CI=1 MACHINE="KP_9000_6XHML_X2" HEALTH=1
+      - name: Make main
+        run: cd main && make CI=1 MACHINE="KP_9000_6XHML_X2" && cp output/KP_9000_6XHML_X2/rtlplayground.map /tmp/main.map
+      - name: Calculate bank growth
+        run: |
+          sed -rn 's/^([XCD]SEG|(BANK[0-9])).*=\s+([0-9]+)\. bytes.*$/MAIN_\1=\3/p' /tmp/main.map | sort | uniq >> "$GITHUB_ENV"
+          sed -rn 's/^([XCD]SEG|(BANK[0-9])).*=\s+([0-9]+)\. bytes.*$/BRANCH_\1=\3/p' /tmp/branch.map | sort | uniq >> "$GITHUB_ENV"
+      - name: Update PR comment
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: Sizes
+          message: |
+            ## Image Growth
+
+            Commit: ${{ github.sha }}
+
+            | Bank # | Main | Branch |
+            | --- | --- | --- |
+            | XSEG | ${{ env.MAIN_XSEG }} bytes | ${{ env.BRANCH_XSEG }} bytes |
+            | CSEG | ${{ env.MAIN_CSEG }} bytes | ${{ env.BRANCH_CSEG }} bytes |
+            | DSEG | ${{ env.MAIN_DSEG }} bytes | ${{ env.BRANCH_DSEG }} bytes |
+            | 1 | ${{ env.MAIN_BANK1 }} bytes | ${{ env.BRANCH_BANK1 }} bytes |
+            | 2 | ${{ env.MAIN_BANK2 }} bytes | ${{ env.BRANCH_BANK2 }} bytes |
+            | 3 | ${{ env.MAIN_BANK3 }} bytes | ${{ env.BRANCH_BANK3 }} bytes |