Reapply "build-aux: rewrite version.sh in awk"

This reverts commit 1c3e268.

.github/workflows/solaris.yml

@@ -20,6 +20,7 @@ jobs:
         usesh: true
         prepare: |
           pkg install bash libtool automake gnu-m4 tree wget gcc autoconf
+          pkg install --accept developerstudio-125
         run: |
           export LC_ALL=C LANG=C
 

build-aux/version.sh

@@ -9,14 +9,37 @@
 #############################################################################
 #
 # Author: Lasse Collin
+#         Kerin Millar
 #
 #############################################################################
 
-sed -n 's/LZMA_VERSION_STABILITY_ALPHA/alpha/
-	s/LZMA_VERSION_STABILITY_BETA/beta/
-	s/LZMA_VERSION_STABILITY_STABLE//
-	s/^#define LZMA_VERSION_[MPS][AIT][AJNT][A-Z]* //p' \
-	src/liblzma/api/lzma/version.h \
-	| tr '\n' '|' \
-	| sed 's/|/./; s/|/./; s/|//g' \
-	| tr -d '\r\n'
+# Solaris provides a legacy awk implementation as /usr/bin/awk. It also provides
+# /usr/bin/nawk, which is more or less POSIX-compliant. Be sure to use it.
+if grep Solaris /etc/release >/dev/null 2>&1; then
+	awk=nawk
+else
+	awk=awk
+fi
+
+"$awk" -f - <<'EOF'
+
+BEGIN {
+	ARGV[1] = "src/liblzma/api/lzma/version.h"
+	ARGC = 2
+	OFS = "."
+	ORS = ""
+}
+
+/^#define LZMA_VERSION_(MAJOR|MINOR|PATCH|STABILITY) / {
+	sub(/.*_/, "", $2)
+	sub(/.*_/, "", $3)
+	if ($2 != "STABILITY" || $3 != "STABLE") {
+		ver[$2] = tolower($3)
+	}
+}
+
+END {
+	print ver["MAJOR"], ver["MINOR"], ver["PATCH"] ver["STABILITY"]
+}
+
+EOF