From a38331404079fe68dae977647a176f5632fb386f Mon Sep 17 00:00:00 2001
From: Sebastiaan de Schaetzen <sebastiaan.de.schaetzen@gmail.com>
Date: Wed, 23 Apr 2025 11:55:47 +0200
Subject: [PATCH] Add up-to-date check to not recompile things that have not
 changed

---
 .gitea/workflows/up-to-date.sh | 47 ++++++++++++++++++++++++++++++++++
 .gitea/workflows/workflow.yml  | 31 +++++++++++++++++++++-
 PKGBUILD                       |  3 ++-
 3 files changed, 79 insertions(+), 2 deletions(-)
 create mode 100755 .gitea/workflows/up-to-date.sh

diff --git a/.gitea/workflows/up-to-date.sh b/.gitea/workflows/up-to-date.sh
new file mode 100755
index 0000000..e972df0
--- /dev/null
+++ b/.gitea/workflows/up-to-date.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Exit on any error
+set -e
+
+# Source the PKGBUILD in a subshell to avoid polluting the global environment
+(
+    source ./PKGBUILD
+
+    # Convert pkgname to array in case it's a single string
+    pkgnames=("${pkgname[@]}")
+
+    for pkg in "${pkgnames[@]}"; do
+        echo "Checking package: $pkg"
+
+        if pacman -Si "$pkg" &>/dev/null; then
+            echo "Package '$pkg' exists in a repository."
+
+            # Get the package build date
+            pkg_build_date=$(date -d "$(pacman -Si "$pkg" | grep 'Build Date' | cut -d: -f2-)" +%s)
+
+            all_deps=("${depends[@]}" "${makedepends[@]}" "${optdepends[@]}")
+
+            # Check each dependency
+            for dep in "${all_deps[@]}"; do
+                dep_name=$(echo "$dep" | sed 's/[<>=].*//')  # Remove version constraints
+                echo "Querying dependency: $dep_name"
+
+                if pacman -Si "$dep_name" &>/dev/null; then
+                    dep_build_date=$(date -d "$(pacman -Si "$dep_name" | grep 'Build Date' | cut -d: -f2-)" +%s)
+                    if (( dep_build_date >= pkg_build_date )); then
+                        echo "Dependency '$dep_name' has newer or equal build date than '$pkg'."
+                        exit 1
+                    fi
+                else
+                    echo "Dependency '$dep_name' not found in repositories. Skipping."
+                fi
+            done
+
+            echo "All dependencies are older than package '$pkg'."
+            exit 0
+        else
+            echo "Package '$pkg' does NOT exist in any repository."
+            exit 1
+        fi
+    done
+)
diff --git a/.gitea/workflows/workflow.yml b/.gitea/workflows/workflow.yml
index ab4254c..55a5c67 100644
--- a/.gitea/workflows/workflow.yml
+++ b/.gitea/workflows/workflow.yml
@@ -37,12 +37,37 @@ jobs:
         run: |
           curl https://idlesleep.wolproxy.seeseepuff.be/status
 
+  check:
+    name: Check if rebuild is necessary
+    runs-on: ubuntu-amd64
+    needs: wake
+    outputs:
+      up-to-date: ${{ steps.up-to-date.outputs.up-to-date }}
+    container:
+      image: gitea.seeseepuff.be/archlinux/archlinux:latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      
+      - name: Ensure image is up-to-date
+        run: |
+          sudo pacman -Sy --noconfirm
+      
+      - name: Check if rebuild is necessary
+        id: up-to-date
+        run: |
+          set +e
+          .gitea/workflows/up-to-date.sh
+          echo "exit_code=$?" >> "$GITHUB_OUTPUT"
+          set -e
+
   build:
     name: Build and Push
     runs-on: ubuntu-amd64
-    needs: wake
+    needs: check
     container:
       image: gitea.seeseepuff.be/archlinux/archlinux:latest
+    if: needs.check.outputs.up-to-date == '1'
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -50,6 +75,10 @@ jobs:
       - name: Ensure image is up-to-date
         run: |
           sudo pacman -Syu --noconfirm
+      
+      - name: Check if rebuild is necessary
+        run: |
+          .gitea/workflows/up-to-date.sh
 
       - name: Build package
         run: |
diff --git a/PKGBUILD b/PKGBUILD
index 492e52c..d251215 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -15,7 +15,8 @@ optdepends=(
   'sudo: privilege elevation'
   'doas: privilege elevation'
 )
-makedepends=('go>=1.21')
+makedepends=('go>=1.21'
+  'helloworld')
 source=("${pkgname}-${pkgver}.tar.gz::https://github.com/Jguer/yay/archive/v${pkgver}.tar.gz")
 sha256sums=('f3f4af5d84f75abc3ea726f192568bdf570e2632b4b3c214effa4bba406ad293')