From c2fd0ecfda24377fae5fba38b1221e60971315ec Mon Sep 17 00:00:00 2001
From: Peder Bergebakken Sundt <pbsds@hotmail.com>
Date: Mon, 13 Jul 2026 16:55:42 +0200
Subject: [PATCH] just checkout lol

---
 justfile | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 59 insertions(+), 5 deletions(-)

diff --git a/justfile b/justfile
index 8b9da16..9378333 100644
--- a/justfile
+++ b/justfile
@@ -413,6 +413,12 @@ __build_packages $system $outdir +$attrpaths:
     chmod +x "$outdir"/_rerun.sh
     fd . "$outdir" -l
 
+# TODO: redesign or drop
+@build-pr-packages $pr=`just _a_pr` $merge=`gum choose --header="which refs/pull/<id>/xxx ?" merge head` $attrpaths=`just _some_packages` $args=`gum choose --no-limit -- -j0 "--system "{aarch64,x86_64}-{darwin,linux} --rebuild`:
+    printf "github:nixos/nixpkgs/refs/pull/"$(just _sanitize_pr_url "$pr")"/$merge#%s\n" $attrpaths | xargs {{XARGS_NL}} echo + nom build $args
+    (printf "github:nixos/nixpkgs/refs/pull/"$(just _sanitize_pr_url "$pr")"/$merge#%s\n" $attrpaths | xargs {{XARGS_NL}} nom build $args) ||:
+    printf "github:nixos/nixpkgs/refs/pull/"$(just _sanitize_pr_url "$pr")"/$merge#%s\n" $attrpaths | xargs {{XARGS_NL}} echo + nom build $args
+
 # TODO: use in 'bump'
 [no-cd]
 build-package-sources *packages:
@@ -473,11 +479,59 @@ _build_package_sources $system +packages:
     } >build.nix
     chmod +x build.nix
 
-# TODO: redesign or drop
-@build-pr-packages $pr=`just _a_pr` $merge=`gum choose --header="which refs/pull/<id>/xxx ?" merge head` $attrpaths=`just _some_packages` $args=`gum choose --no-limit -- -j0 "--system "{aarch64,x86_64}-{darwin,linux} --rebuild`:
-    printf "github:nixos/nixpkgs/refs/pull/"$(just _sanitize_pr_url "$pr")"/$merge#%s\n" $attrpaths | xargs {{XARGS_NL}} echo + nom build $args
-    (printf "github:nixos/nixpkgs/refs/pull/"$(just _sanitize_pr_url "$pr")"/$merge#%s\n" $attrpaths | xargs {{XARGS_NL}} nom build $args) ||:
-    printf "github:nixos/nixpkgs/refs/pull/"$(just _sanitize_pr_url "$pr")"/$merge#%s\n" $attrpaths | xargs {{XARGS_NL}} echo + nom build $args
+[no-cd]
+checkout-package-sources *packages:
+    #!/usr/bin/env -S bash -euo pipefail
+    packages=("$@")
+    [[ "${#packages[@]}" -gt 0 ]] || readarray -td $'\n' packages < <( just _some_packages )
+    just _checkout_package_sources "${packages[@]}"
+
+[no-cd]
+_checkout_package_sources *packages:
+    #!/usr/bin/env -S bash -euo pipefail
+    packages=("$@")
+    verbose() (set -x; "$@";)
+    if [[ -d results-checkout ]]; then
+      verbose rm -rf results-checkout/
+    fi
+    delcare -A repo_urls=()
+    delcare -A repo_revs=()
+    for package in "${packages[@]}"; do
+      repo_url=$(verbose nix eval -f default.nix "$package".src.gitRepoUrl --raw ||:)
+      [[ -n "$repo_url" ]] || continue
+
+      repo_rev=$(verbose nix eval -f default.nix "$package".src.tag --raw ||:)
+      [[ -n "$repo_rev" ]] ||
+      repo_rev=$(verbose nix eval -f default.nix "$package".src.rev --raw ||:)
+      [[ -n "$repo_rev" ]] || continue
+
+      repo_urls["$package"]="$repo_url"
+      repo_urls["$package"]="$repo_rev"
+      verbose git clone "$repo_url" results-checkout/"$package".src --branch "$repo_rev" ||:
+    done
+    {
+        # echo "#!/usr/bin/env -S nom-build"
+        echo "#!/usr/bin/env -S nom build -f"
+        echo "let pkgs = import ./. { }; in {"
+        for package in "${packages[@]}"; do
+            # printf "  # ./build.nix -A %q" "$package"
+            echo "  /*"
+            printf "  ./build.nix %q\n" "$package"
+            printf "  ./build.nix %q\n" "$package"
+            echo "  */"
+            printf "  %s = pkgs.%s.overrideAttrs { src = ./results-checkout/%s.src; };\n" "$package" "$package" "$package"
+        done
+        echo "}"
+        echo "/*"
+        echo "nom-build ./build.nix$(printf " -A %q" "${packages[@]}")"
+        echo "nix-build ./build.nix$(printf " -A %q" "${packages[@]}")"
+        echo "./build.nix$(printf " %q" "${packages[@]}")"
+        echo "./build.nix"
+        printf "git -C ./results-checkout/%s.src diff\n" "${packages[@]}"
+        echo "*/"
+    } >build.nix
+    chmod +x build.nix
+
 
 # === commit helpers ===