Draft - upstream.

Author: mirage335

_lib/ubiquitous_bash

@@ -39,7 +39,7 @@ _ub_cksum_special_derivativeScripts_contents() {
 #export ub_setScriptChecksum_disable='true'
 ( [[ -e "$0".nck ]] || [[ "${BASH_SOURCE[0]}" != "${0}" ]] || [[ "$1" == '--profile' ]] || [[ "$1" == '--script' ]] || [[ "$1" == '--call' ]] || [[ "$1" == '--return' ]] || [[ "$1" == '--devenv' ]] || [[ "$1" == '--shell' ]] || [[ "$1" == '--bypass' ]] || [[ "$1" == '--parent' ]] || [[ "$1" == '--embed' ]] || [[ "$1" == '--compressed' ]] || [[ "$0" == "/bin/bash" ]] || [[ "$0" == "-bash" ]] || [[ "$0" == "/usr/bin/bash" ]] || [[ "$0" == "bash" ]] ) && export ub_setScriptChecksum_disable='true'
 export ub_setScriptChecksum_header='3620520443'
-export ub_setScriptChecksum_contents='1482882224'
+export ub_setScriptChecksum_contents='3891783678'
 
 # CAUTION: Symlinks may cause problems. Disable this test for such cases if necessary.
 # WARNING: Performance may be crucial here.
@@ -8485,6 +8485,43 @@ APT::AutoRemove::SuggestsImportant "true";' | tee /etc/apt/apt.conf.d/99autoremo
 
 
 
+# ATTENTION
+# NOTICE
+# May be able to automatically respond to nix package manager file conflicts.
+# WARNING: May be untested.
+# ATTRIBUTION-AI: Suggested by CLI Codex (ie. _codexAuto) 2025-07-20 .
+#
+#_nixInstallRetry() {
+	#local -a cmd=( "$@" ) out status file
+	#if out=$( "${cmd[@]}" 2>&1 ); then
+		#printf '%s\n' "$out"
+		#return 0
+	#else
+		#status=$?
+		#if printf '%s\n' "$out" | grep -q "file conflict over '"; then
+			#file=$(printf '%s\n' "$out" | sed -n "s/.*file conflict over '\([^']*\)'.*/\1/p")
+			#_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'rm -f "$HOME/.nix-profile/'"$file"'"'
+			#"${cmd[@]}"
+			#return $?
+		#else
+			#printf '%s\n' "$out" >&2
+			#return $status
+		#fi
+	#fi
+#}
+#export -f _nixInstallRetry
+#
+#_nixInstallRetry _getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; export NIXPKGS_ALLOW_INSECURE=1 ; nix-env -iA pcb -f https://github.com/NixOS/nixpkgs/archive/00a3a62a70f6c2ca919befeda4b8a7319ce8be2b.tar.gz'
+
+
+
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+
 # NOTICE
 # https://lazamar.co.uk/nix-versions/?channel=nixpkgs-unstable&package=geda
 # https://lazamar.co.uk/nix-versions/?package=geda&version=1.10.2&fullName=geda-1.10.2&keyName=geda&revision=9957cd48326fe8dbd52fdc50dd2502307f188b0d&channel=nixpkgs-unstable#instructions
@@ -8579,8 +8616,8 @@ _get_from_nix-user() {
 	#  export LANG=C
 	#  https://bbs.archlinux.org/viewtopic.php?id=23505
 
-	#nix-env --uninstall geda
-	#nix-env --uninstall pcb
+	nix-env --uninstall 'geda.*' || true
+	nix-env --uninstall 'pcb.*'  || true
 
 
 
@@ -8593,6 +8630,9 @@ _get_from_nix-user() {
 	#  CAUTION: Be wary if this file has changed recently.
 
 	# ###
+	# Remove previous geda and pcb to prevent overlapping file conflicts (e.g. gnet-pcbfwd.scm).
+	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; nix-env --uninstall geda.* || true'
+	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; nix-env --uninstall pcb.*  || true'
 	# Seems to have removed xorn, python2.7 . May not have been tested through ubdist/WSL . May be accepted for now due to some apparently successful testing expected to match this specific version.
 	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; export NIXPKGS_ALLOW_INSECURE=1 ; nix-env -iA geda -f https://github.com/NixOS/nixpkgs/archive/773a8314ef05364d856e46299722a9d849aacf8b.tar.gz'
 
@@ -8608,11 +8648,16 @@ _get_from_nix-user() {
 	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; xdg-desktop-menu install "$HOME"/.nix-profile/share/applications/geda-gattrib.desktop'
 	_getMost_backend sudo -n -u "$currentUser" cp -a /home/"$currentUser"/.nix-profile/share/icons /home/"$currentUser"/.local/share/
 
-	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; export NIXPKGS_ALLOW_INSECURE=1 ; nix-env -iA nixpkgs.pcb'
+	# nixpkgs.pcb
+	# Remove conflicting shared scheme file before installing pcb
+	#_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd; rm -f "$HOME"/.nix-profile/share/gEDA/gnet-pcbfwd.scm'
+
+	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; export NIXPKGS_ALLOW_INSECURE=1 ; nix-env -iA pcb -f https://github.com/NixOS/nixpkgs/archive/00a3a62a70f6c2ca919befeda4b8a7319ce8be2b.tar.gz'
 
 
 	# Necessary, do NOT remove. Necessary for 'gsch2pcb' , 'gnetlist' , etc, since installation as a dependency does not make the necessary binaries available to the usual predictable PATH .
-	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; export NIXPKGS_ALLOW_INSECURE=1 ; nix-env -iA nixpkgs.python2'
+	#nixpkgs.python2
+	_getMost_backend sudo -n -u "$currentUser" /bin/bash -l -c 'cd ; export NIXPKGS_ALLOW_INSECURE=1 ; nix-env -iA python2 -f https://github.com/NixOS/nixpkgs/archive/00a3a62a70f6c2ca919befeda4b8a7319ce8be2b.tar.gz'
 
 
 
@@ -9070,11 +9115,20 @@ _test_nix-env_sequence() {
 	cd "$safeTmp"
 
 	# https://ariya.io/2016/06/isolated-development-environment-using-nix
+	#cat << 'CZXWXcRMTo8EmM8i4d' > ./default.nix
+#with import <nixpkgs> {};
+#stdenv.mkDerivation rec {
+  #name = "env";
+  #env = buildEnv { name = name; paths = buildInputs; };
+  #buildInputs = [
+    #hello
+  #];
+#}
+#CZXWXcRMTo8EmM8i4d
+
 	cat << 'CZXWXcRMTo8EmM8i4d' > ./default.nix
 with import <nixpkgs> {};
-stdenv.mkDerivation rec {
-  name = "env";
-  env = buildEnv { name = name; paths = buildInputs; };
+mkShell {
   buildInputs = [
     hello
   ];
@@ -23300,6 +23354,11 @@ _stop() {
 	[[ -e "$scriptLocal"/python_cygwin.lock ]] && [[ $(head -c $(echo -n "$sessionid" | wc -c | tr -dc '0-9') "$scriptLocal"/python_cygwin.lock 2> /dev/null ) == "$sessionid" ]] && rm -f "$scriptLocal"/python_cygwin.lock > /dev/null 2>&1
 
 	_stop_stty_echo
+
+	# WARNING: CAUTION: Do NOT cause EXIT trap unset until 'exit' command cannot be called (eg. by user in an interactive shell).
+	# Unset the 'exit' trap before calling 'exit' command properly , hopefully prevent incorrect exit status in some unusual situations (eg. CI environment, 'set -e -o pipefail' , etc) .
+	trap - EXIT
+
 	if [[ "$1" != "" ]]
 	then
 		exit "$1"