[OS-BUILD PATCH] redhat/scripts/expand_srpm.sh: add missing function, robustify

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From: Denys Vlasenko <dvlasenk@xxxxxxxxxx>

redhat/scripts/expand_srpm.sh: add missing function, robustify

"die" (presumably a shell function) is not defined. Add it.

Delete the empty line at the end of the script,
git complained when I added a copy of this file to another tree.

This part will happily execute if someone just accidentally runs
the script from the command line with no arguments:
    cd "$cloned/$PACKAGE_NAME"
    rm -r -- *
...and might delete most of your files!
Add a safeguard against this.

While at it, remove superfluous stray semicolons.

Signed-off-by: Denys Vlasenko <dvlasenk@xxxxxxxxxx>

diff --git a/redhat/scripts/expand_srpm.sh b/redhat/scripts/expand_srpm.sh
index blahblah..blahblah 100755
--- a/redhat/scripts/expand_srpm.sh
+++ b/redhat/scripts/expand_srpm.sh
@@ -1,9 +1,18 @@
 #!/bin/sh
 
+die() {
+	echo "Error: $1" >&2
+	exit 1
+}
+
 # $1: cloned tree
-cloned="$1";
+cloned="$1"
+
+# Avoid accidental "rm *" in the root directory
+test "$cloned" || die '$1 is not given'
+test "$SPECPACKAGE_NAME" || die '$SPECPACKAGE_NAME is not set'
 
-cd "$cloned/$SPECPACKAGE_NAME" || die "\"$cloned\" doesn't seem to have a dist-git clone";
+cd "$cloned/$SPECPACKAGE_NAME" || die "\"$cloned\" doesn't seem to have a dist-git clone"
 
 # delete everything in the cloned tree to avoid having stale files
 rm -r -- *
@@ -17,4 +26,3 @@ echo "*.bz2" >> .gitignore
 rpm2cpio "$SRPM" | cpio -idmv
 
 git add -A
-

--
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2619
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