From c27beab66023847435fb88cd5cc75916dca37057 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lucio=20Andr=C3=A9s=20Illanes=20Albornoz=20=28arab=2C=20vx?=
 =?UTF-8?q?p=29?= <lucio@lucioillanes.de>
Date: Mon, 20 Nov 2017 21:45:21 +0000
Subject: Refactors build steps along the sequence
 {setup,fetch,configure,build,install}. subr/mode_check_updates.subr:
 seperated into check_updates.sh.
 subr/post_{copy_etc,sha256sums,tarballs}.subr: absorbed into `dist' target.

---
 subr/pre_check.subr | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 subr/pre_check.subr

(limited to 'subr/pre_check.subr')

diff --git a/subr/pre_check.subr b/subr/pre_check.subr
new file mode 100644
index 00000000..28e229e9
--- /dev/null
+++ b/subr/pre_check.subr
@@ -0,0 +1,38 @@
+#
+# set -o errexit -o noglob are assumed.
+#
+
+pre_check() {
+	local __ _exit;
+	for __ in ${CHECK_PATH_VARS}; do
+		if [ -z "${___:=$(get_var_unsafe "${__}")}" ]; then
+			log_msg failexit "Error: variable \`${__}' is empty or unset.";
+		elif [ "${___#* *}" != "${___}" ]; then
+			log_msg failexit "Error: variable \`${__}' contains one or more whitespace characters.";
+		fi;
+	done;
+	for __ in ${CHECK_PREREQ_CMDS} $(eval echo ${CHECK_PREREQ_FILES_DYNAMIC}) ${CHECK_PREREQ_FILES}; do
+		if [ "${__#/}" != "${__}" ]; then
+			if [ ! -e "${__}" ]; then
+				log_msg fail "Error: missing prerequisite file \`${__}'.";
+				_exit=1;
+			fi;
+		else
+			if ! test_cmd "${__}"; then
+				log_msg fail "Error: missing prerequisite command \`${__}'.";
+				_exit=1;
+			fi;
+		fi;
+	done;
+	for __ in ${CHECK_PREREQ_PERL_MODULES}; do
+		if ! perl -M"${__}" -e "" 2>/dev/null; then
+			log_msg fail "Error: missing prerequisite Perl module \`${__}'.";
+			_exit=1;
+		fi;
+	done;
+	if [ ${_exit:-0} = 1 ]; then
+		exit 1;
+	fi;
+};
+
+# vim:filetype=sh
-- 
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