From 1f02b65c590b5a33c1b70dba186eacfe3f67f149 Mon Sep 17 00:00:00 2001 From: "Travis A. Everett" Date: Tue, 8 Sep 2020 00:07:53 -0500 Subject: [PATCH] fix xpath and conditional bugs; xpath -> xmllint - xpath -> xmllint: xpath's cli interface changed in Big Sur rather than add conditional logic for picking the correct syntax for xpath, I'm changing to xmllint --xpath, which appears to be consistent across versions I've tested... - /plist/dict/key[text()='Writable']/following-sibling::true[1] doesn't do quite what's expected. It was written to try to select a node paired with the Writable key, but it will also select the *next* node that appears even if it was paired with another key. - I think there's also a logic bug in the conditionals here. I'm not sure anyone ever actuall saw it, thanks to the xpath bug, though. With the xpath fix, this conditional passes if /nix does not exist, / IS writable, and the version is Catalina+. I think it meant to test for /nix does not exist, / is NOT writable, and the version is Catalina+. I reworked this lightly to make it a little clearer at the code level. --- scripts/install-nix-from-closure.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scripts/install-nix-from-closure.sh b/scripts/install-nix-from-closure.sh index e7e063007..4e64f3d43 100644 --- a/scripts/install-nix-from-closure.sh +++ b/scripts/install-nix-from-closure.sh @@ -110,8 +110,8 @@ if [ "$(uname -s)" = "Darwin" ]; then "$self/create-darwin-volume.sh" fi - info=$(diskutil info -plist / | xpath "/plist/dict/key[text()='Writable']/following-sibling::true[1]" 2> /dev/null) - if ! [ -e $dest ] && [ -n "$info" ] && { [ "$macos_major" -gt 10 ] || { [ "$macos_major" -eq 10 ] && [ "$macos_minor" -gt 14 ]; }; }; then + writable="$(diskutil info -plist / | xmllint --xpath "name(/plist/dict/key[text()='Writable']/following-sibling::*[1])" -)" + if ! [ -e $dest ] && [ "$writable" = "false" ]; then ( echo "" echo "Installing on macOS >=10.15 requires relocating the store to an apfs volume."