From 13a2acfd701820311adb9bd12816f0d34a74d6dd Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Sat, 15 Mar 2025 04:55:09 +0000
Subject: [PATCH] scripts/update: dont hardcode the location of this repo

---
 scripts/update | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/scripts/update b/scripts/update
index 08d927593..12a492700 100755
--- a/scripts/update
+++ b/scripts/update
@@ -1,9 +1,9 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p findutils -p nix-update
+#!nix-shell -i bash -p findutils -p git -p nix-update
 
-NIX_FILES_TOP=/home/colin/nixos
 # each update job has to do an entire nix eval, which can be memory intensive; be careful when tuning this
 PARALLELISM=8
+SELF_PATH=$PWD/$0
 
 usage() {
   echo "update: update rev/hash for one or more packages"
@@ -41,6 +41,14 @@ hasEffect() {
   fi
 }
 
+REPO_ROOT=
+repo_root() {
+  if [ -z "$REPO_ROOT" ]; then
+    REPO_ROOT=$(git -C "$(dirname SELF_PATH)" rev-parse --show-toplevel)
+  fi
+  echo "$REPO_ROOT"
+}
+
 # usage: getPkgs outVar prefix
 getPkgs() {
   local -n attrsArr="$1"
@@ -53,10 +61,10 @@ getPkgs() {
   # # but since i use Import From Derivation along paths which i also want to query,
   # # then i need to ensure those derivations are available for import.
   # debug "creating requisite .drv store paths"
-  # nix-instantiate -A nix "$NIX_FILES_TOP"
-  # nix-instantiate -A nixpkgs-bootstrap.master "$NIX_FILES_TOP"
+  # nix-instantiate -A nix "$(repo_root)"
+  # nix-instantiate -A nixpkgs-bootstrap.master "$(repo_root)"
   debug "querying packages to update as part of '$attrPrefix'"
-  local attrs=$(nix eval --raw -f "$NIX_FILES_TOP" 'updateTargets."'"$attrPrefix"'"' --apply 'builtins.concatStringsSep " "' "${nixFlags[@]}")
+  local attrs=$(nix eval --raw -f "$(repo_root)" 'updateTargets."'"$attrPrefix"'"' --apply 'builtins.concatStringsSep " "' "${nixFlags[@]}")
   debug "got: $attrs"
   attrsArr+=($attrs)
 }
@@ -64,14 +72,14 @@ getPkgs() {
 updateOnePkg() {
   local attrPath="$1"
 
-  local updateScript=$(nix eval --raw -f "$NIX_FILES_TOP" 'updateScripts."'"$attrPath"'"' "${nixFlags[@]}")
+  local updateScript=$(nix eval --raw -f "$(repo_root)" 'updateScripts."'"$attrPath"'"' "${nixFlags[@]}")
   if [ -z "$updateScript" ]; then
     warn "don't know how to update '$attrPath'"
     return
   fi
 
   # make sure everything needed to invoke the update script exists in-store
-  local context=$(nix eval --raw -f "$NIX_FILES_TOP" 'updateScripts."'"$attrPath"'"' --apply 's: builtins.concatStringsSep " " (builtins.attrNames (builtins.getContext s))' "${nixFlags[@]}")
+  local context=$(nix eval --raw -f "$(repo_root)" 'updateScripts."'"$attrPath"'"' --apply 's: builtins.concatStringsSep " " (builtins.attrNames (builtins.getContext s))' "${nixFlags[@]}")
   for c in $context; do
     debug "realizing updateScript requisite: $context"
     nix-store --realize "$c" "${nixFlags[@]}" || true