main/postmarketos-base: fix wpa_supplicant config (!365)

Fix wifi on htc-ace by properly setting nl80211 before wext.

/etc/conf.d/wpa_supplicant is supposed to get modified twice with the
current code in the post-install file. The first one was patched
recently to set nl80211 before wext, but that change does not work in
practice, for two reasons:

1. The code block does not even get executed, because apk reports that
   /etc/conf.d/wpa_supplicant was already modified (by a package that
   was installed before, in its post-install script? I could not find
   out which one does that though).
2. Even if it worked, the second code block would revert the change and
   put wext before nl80211 again.

Fix this by removing the first code block, and changing the order in the
second one. Make it easier to catch such errors in the future, by
printing, which files get modified, or get skipped. Set "#!/bin/sh -e",
so the script can not fail silently.

When doing pmbootstrap -y zap and then pmbootstrap install, the output
looks like this:

(141/151) Installing postmarketos-base (3-r26)
Executing postmarketos-base-3-r26.post-install
- Modifying: /etc/fstab
- Modifying: /etc/issue
- Modifying: /etc/motd
- Modifying: /etc/conf.d/syslog
- Modifying: /etc/conf.d/wpa_supplicant
- Modifying: /etc/sudoers
- Modifying: /etc/chrony/chrony.conf

main/postmarketos-base/APKBUILD

@@ -1,6 +1,6 @@
 pkgname=postmarketos-base
 pkgver=3
-pkgrel=26
+pkgrel=27
 pkgdesc="Meta package for minimal postmarketOS base"
 url="https://postmarketos.org"
 arch="noarch"

main/postmarketos-base/postmarketos-base.post-install

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 
 # Enable udev OpenRC services and runlevels
 # https://github.com/alpinelinux/aports/blob/master/main/eudev/setup-udev
@@ -22,10 +22,16 @@ done
 mkdir -p /run/openrc
 touch /run/openrc/shutdowntime
 
+# Replace a config file from stock Alpine, unless apk reports that the user has
+# modified it (note that this does not allow properly updating these configs
+# when postmarketos-base gets updated yet, see issue pmaports#258).
 write_unless_modified() {
 	# Redirect the stdin to the file unless it has been modified
 	# $1: file path
-	if ! apk audit "$(dirname "$1")" | grep -q "${1:1}"; then
+	if apk audit "$(dirname "$1")" | grep -q "${1:1}"; then
+		echo "- NOT modifying (file was changed before): $1"
+	else
+		echo "- Modifying: $1"
 		cat > "$1"
 	fi
 }
@@ -58,25 +64,24 @@ write_unless_modified() {
 	echo ''
 } | write_unless_modified /etc/motd
 
-# Change wpa_supplicant into dbus mode and enable both drivers
-{
-	echo 'wpa_supplicant_args="-u -Dnl80211,wext"'
-} | write_unless_modified /etc/conf.d/wpa_supplicant
-touch /etc/wpa_supplicant/wpa_supplicant.conf
-
 # Enable syslog to SHM. Note: size is 4048KiB, which *should* be More Than Enough(TM) for all but the most chattiest of devices.
+echo "- Modifying: /etc/conf.d/syslog"
 sed s/=\"/=\""-C4048 "/  -i /etc/conf.d/syslog
 
-# Enable wext, nl80211 & dbus control for wpa_supplicant
-if ! grep -q Dwext /etc/conf.d/wpa_supplicant; then
-	sed -i 's/wpa_supplicant_args=\"/wpa_supplicant_args=\" -u -Dwext,nl80211/' /etc/conf.d/wpa_supplicant
+# Enable nl80211,wext & dbus control for wpa_supplicant
+if ! grep -q Dnl80211,wext /etc/conf.d/wpa_supplicant; then
+	echo "- Modifying: /etc/conf.d/wpa_supplicant"
+	sed -i 's/wpa_supplicant_args=\"/wpa_supplicant_args=\" -u -Dnl80211,wext/' \
+		/etc/conf.d/wpa_supplicant
 fi
 touch /etc/wpa_supplicant/wpa_supplicant.conf
 
 # Enable the 'wheel' group
+echo "- Modifying: /etc/sudoers"
 sed -i 's/# %wheel ALL=(ALL) ALL/%wheel ALL=(ALL) ALL/' /etc/sudoers
 
 # Set chrony to quickly correct system time on first boot, if necessary
 if ! grep -q "makestep" /etc/chrony/chrony.conf; then
+	echo "- Modifying: /etc/chrony/chrony.conf"
 	echo "makestep 1 -1" >> /etc/chrony/chrony.conf
 fi