[newlib-cygwin] fix cygwin-doc postinstall/preremove no SMPrograms/Cygwin dir

[Corinna Vinschen <corinna at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=cff8513220bac1c938c366df90757372e4a1bb76

commit cff8513220bac1c938c366df90757372e4a1bb76
Author: Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>
Date:   Wed Jul 5 12:28:54 2017 -0600

    fix cygwin-doc postinstall/preremove no SMPrograms/Cygwin dir

Diff:
---
 winsup/doc/etc.postinstall.cygwin-doc.sh | 35 +++++++++++++++----------
 winsup/doc/etc.preremove.cygwin-doc.sh   | 45 +++++++++++++++++++++++++++++---
 2 files changed, 63 insertions(+), 17 deletions(-)

diff --git a/winsup/doc/etc.postinstall.cygwin-doc.sh b/winsup/doc/etc.postinstall.cygwin-doc.sh
index 3a9457f..1d41ef0 100755
--- a/winsup/doc/etc.postinstall.cygwin-doc.sh
+++ b/winsup/doc/etc.postinstall.cygwin-doc.sh
@@ -6,35 +6,42 @@
 # CYGWINFORALL=-A if install for All Users
 # installs local shortcuts for All Users or Current User in
 # {ProgramData,~/Appdata/Roaming}/Microsoft/Windows/Start Menu/Programs/Cygwin/
+# exits quietly if directory does not exist as presumably no shortcuts desired
 
+doc=/usr/share/doc/cygwin-doc
+site=https://cygwin.com
 cygp=/bin/cygpath
 mks=/bin/mkshortcut
-un=/bin/uname
-site=https://cygwin.com
 
-# check for programs
-for p in $un $cygp $mks
+html=$doc/html
+
+# check source directories created
+for d in $doc $html
 do
-	if [ ! -x $p ]
+	if [ ! -d "$d/" ]
 	then
-		echo "Can't find program '$p'"
+		echo "Can't find directory '$d'"
 		exit 2
 	fi
 done
 
-doc=/usr/share/doc/cygwin-doc
-html=$doc/html
-smpc_dir="$($cygp $CYGWINFORALL -P -U)/Cygwin"
-
-for d in $doc $html "$smpc_dir"
+# check for programs
+for p in $cygp $mks
 do
-	if [ ! -d "$d/" ]
+	if [ ! -x $p ]
 	then
-		echo "Can't find directory '$d'"
+		echo "Can't find program '$p'"
 		exit 2
 	fi
 done
 
+# Cygwin Start Menu directory
+smpc_dir="$($cygp $CYGWINFORALL -P -U --)/Cygwin"
+
+# check Cygwin Start Menu directory still exists
+[ -d "$smpc_dir/" ] || exit 0
+
+# check Cygwin Start Menu directory writable
 if [ ! -w "$smpc_dir/" ]
 then
 	echo "Can't write to directory '$smpc_dir'"
@@ -42,7 +49,7 @@ then
 fi
 
 # mkshortcut works only in current directory - change to Cygwin Start Menu
-cd "$smpc_dir" || exit 2	# quit if not found
+cd "$smpc_dir/" || exit 0	# quit if not found
 
 # create User Guide and API PDF and HTML shortcuts
 while read target name desc
diff --git a/winsup/doc/etc.preremove.cygwin-doc.sh b/winsup/doc/etc.preremove.cygwin-doc.sh
index 817d6d6..09e0c9e 100755
--- a/winsup/doc/etc.preremove.cygwin-doc.sh
+++ b/winsup/doc/etc.preremove.cygwin-doc.sh
@@ -6,9 +6,48 @@
 # CYGWINFORALL=-A if remove for All Users
 # remove local shortcuts for All Users or Current User in
 # {ProgramData,~/Appdata/Roaming}/Microsoft/Windows/Start Menu/Programs/Cygwin/
+# exits quietly if directory does not exist as presumably no shortcuts desired
 
-cd "$(/bin/cygpath $CYGWINFORALL -P -U)/Cygwin" || exit 2
+doc=/usr/share/doc/cygwin-doc
+cygp=/bin/cygpath
+rm=/bin/rm
 
-/bin/rm -f -- "User Guide (PDF).lnk" "User Guide (HTML).lnk" \
-	"API (PDF).lnk" "API (HTML).lnk" "Home Page.lnk" "FAQ.lnk"
+html=$doc/html
+
+# check for programs
+for p in $cygp $rm
+do
+	if [ ! -x $p ]
+	then
+		echo "Can't find program '$p'"
+		exit 2
+	fi
+done
+
+# Cygwin Start Menu directory
+smpc_dir="$($cygp $CYGWINFORALL -P -U --)/Cygwin"
+
+# check Cygwin Start Menu directory still exists
+[ -d "$smpc_dir/" ] || exit 0
+
+# check Cygwin Start Menu directory writable
+if [ ! -w "$smpc_dir/" ]
+then
+	echo "Can't write to directory '$smpc_dir'"
+	exit 1
+fi
+
+# remove User Guide and API PDF and HTML, Home Page and FAQ URL link shortcuts
+while read target name desc
+do
+	lnk="$smpc_dir/$name.lnk"
+	[ -f "$lnk" ] && $rm -f -- "$lnk"
+done <<EOF
+$doc/cygwin-ug-net.pdf		User\ Guide\ \(PDF\)  Cygwin\ User\ Guide\ PDF
+$html/cygwin-ug-net/index.html	User\ Guide\ \(HTML\) Cygwin\ User\ Guide\ HTML
+$doc/cygwin-api.pdf		API\ \(PDF\)	Cygwin\ API\ Reference\ PDF
+$html/cygwin-api/index.html	API\ \(HTML\)	Cygwin\ API\ Reference\ HTML
+$site/index.html	Home\ Page	Cygwin\ Home\ Page\ Link
+$site/faq.html		FAQ	Cygwin\ Frequently\ Asked\ Questions\ Link
+EOF