Split some functionality off update.sh

Such that it may be used by the to be bettered make_install.sh.
In particular, the latter is supposed to work for both non-vcs source
and binary packages.

Also add a main() method to update.sh.

1 files changed, 49 insertions, 0 deletions

diff --git a/basic.sh b/basic.sh
new file mode 100644
index 0000000..65b44e5
--- /dev/null
+++ b/basic.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+
+function init
+{
+	tmp_d="$(mktemp -d)"
+	tmp="$tmp_d/a"
+	tmp_="$tmp_d/b"
+}
+
+function cleanup
+{
+	rm -r "$tmp_d"
+}
+trap cleanup EXIT
+
+# $1: string to replace: regular expression
+# $2: string to replace with: sed replacement string
+function replace
+{
+	sed -i "s/${1}/${2}/g" "$tmp"
+}
+
+# $1 line to replace: regular expression
+# $2 text to replace with: (newline terminated) sed replacement string
+# $3 removal type: (rm-plus-one|normal)
+function replace_line
+{
+	if test -n "$2"
+	then
+		cat <(sed "/${1}/,\$ d" < "$tmp") \
+			<(echo -n "$2") \
+			<(sed "0,/${1}/ d" < "$tmp") \
+			> "$tmp_"
+		mv "$tmp_" "$tmp"
+	else
+		if [[ "$3" == rm-plus-one ]]
+		then
+			sed -i "/${1}/,+1 d" "$tmp"
+		else
+			sed -i "/${1}/ d" "$tmp"
+		fi
+	fi
+}
+
+# $1 line to delete: regular expression
+function delete_line
+{
+	sed -i "/${1}/ d" "$tmp"
+}