lib.rc: move helper functions to a seperate file

In order to avoid confusion, I have moved helper functions to lib.rc
from the config.rc file.

FossilOrigin-Name: a51d7fa1235547b1f948eae9cd55ddf3ae365d56364eaa2644b16113ea8dd979

4 files changed, 67 insertions, 58 deletions

diff --git a/config.rc b/config.rc
index cd0c8d8..1bcb708 100644
--- a/config.rc
+++ b/config.rc
@@ -1,18 +1,9 @@
 # -*- mode: redo -*-
 # See LICENSE for copyright information
 
-setv() {
-    # Set variables if unset. Works similar to the Makefile syntax.
-    [ "$3" ] || {
-        printf '%s\n' "Faulty variable syntax" >&2
-        exit 1
-    }
-    var=$1; sym=$2; shift 2
-    case "$sym" in
-        \?=|=) eval "[ \"\$$var\" ]" || export "$var=$*" ;;
-        +=)    eval "export \"$var=\$$var $*\""
-    esac
-}
+# This loads some functions that are shared between redo files.
+# shellcheck source=./lib.rc
+. "${SRC_ROOT:=.}/lib.rc"
 
 setv VERSION = 5.1.1
 
@@ -38,48 +29,3 @@ setv LD = "${CC}"
 # Documentation tools
 setv EMACS    = emacs
 setv MAKEINFO = makeinfo
-
-# Helper functions
-target=$1 basename=$2 dest=$3
-
-redo_clean() {
-    # Clean function for various redo implementations
-    [ -r .do_built ] && {
-        while read -r file; do
-            [ -d "$file" ] || rm -f "$file"
-        done < .do_built
-    }
-    find . -type f \( -name '*.tmp' -o -name '*.did' -o -name '.dep*' -o -name '.target*' \) \
-         -exec rm -f -- {} +
-    [ "$DO_BUILT" ]  || find . -name '.do_built*' -exec rm -rf -- {} +
-    [ "$REDO_BASE" ] || rm -rf -- .redo
-}
-
-targcheck() {
-    # Usage: targcheck [target...]
-    #
-    # Check if current target is one of the given arguments of this function.
-    # Returns 0 if target is one of the arguments, returns 1 if not.
-    case " $* " in *" $target "*) return 0; esac; return 1
-}
-
-PHONY() {
-    # Usage: PHONY [[target...]]
-    #
-    # Function that resembles the .PHONY: target on the classic 'make' system.
-    # You can either use it without an argument on a single target, or specify
-    # multiple targets.
-    if [ -z "$1" ] || targcheck "$@"; then
-        # shellcheck disable=2064
-        trap "rm -f $dest" EXIT INT
-    fi
-}
-
-getbin() {
-    # Function to get all executables
-    find src contrib -name 'cpt-*' ! -name '*.in'
-}
-
-
-# Phony targets
-PHONY all dist clean install uninstall test
diff --git a/docs/default.do b/docs/default.do
index 3519aec..1ce12e2 100644
--- a/docs/default.do
+++ b/docs/default.do
@@ -1,3 +1,4 @@
+SRC_ROOT=..
 . ../config.rc
 
 # Extensionless name of file
diff --git a/lib.rc b/lib.rc
new file mode 100644
index 0000000..193baf0
--- /dev/null
+++ b/lib.rc
@@ -0,0 +1,60 @@
+# -*- mode: redo -*-
+# Helper functions
+target=$1 basename=$2 dest=$3
+
+# Make all targets dependent on the library and the config file
+redo-ifchange "$SRC_ROOT/lib.rc" "$SRC_ROOT/config.rc"
+
+setv() {
+    # Set variables if unset. Works similar to the Makefile syntax.
+    [ "$3" ] || {
+        printf '%s\n' "Faulty variable syntax" >&2
+        exit 1
+    }
+    var=$1; sym=$2; shift 2
+    case "$sym" in
+        \?=|=) eval "[ \"\$$var\" ]" || export "$var=$*" ;;
+        +=)    eval "export \"$var=\$$var $*\""
+    esac
+}
+
+redo_clean() {
+    # Clean function for various redo implementations
+    [ -r .do_built ] && {
+        while read -r file; do
+            [ -d "$file" ] || rm -f "$file"
+        done < .do_built
+    }
+    find . -type f \( -name '*.tmp' -o -name '*.did' -o -name '.dep*' -o -name '.target*' \) \
+         -exec rm -f -- {} +
+    [ "$DO_BUILT" ]  || find . -name '.do_built*' -exec rm -rf -- {} +
+    [ "$REDO_BASE" ] || rm -rf -- .redo
+}
+
+targcheck() {
+    # Usage: targcheck [target...]
+    #
+    # Check if current target is one of the given arguments of this function.
+    # Returns 0 if target is one of the arguments, returns 1 if not.
+    case " $* " in *" $target "*) return 0; esac; return 1
+}
+
+PHONY() {
+    # Usage: PHONY [[target...]]
+    #
+    # Function that resembles the .PHONY: target on the classic 'make' system.
+    # You can either use it without an argument on a single target, or specify
+    # multiple targets.
+    if [ -z "$1" ] || targcheck "$@"; then
+        # shellcheck disable=2064
+        trap "rm -f $dest" EXIT INT
+    fi
+}
+
+getbin() {
+    # Function to get all executables
+    find src contrib -name 'cpt-*' ! -name '*.in'
+}
+
+# Phony targets
+PHONY all dist clean install uninstall test
diff --git a/src/test.do b/src/test.do
index 9791cea..159cece 100644
--- a/src/test.do
+++ b/src/test.do
@@ -1,4 +1,6 @@
-. ../config.rc
+SRC_ROOT=..
+. ${SRC_ROOT}/config.rc
+
 redo-ifchange cpt-lib
 exec >&2
 find . ../contrib -name 'cpt-*' ! -name '*.*' -exec shellcheck -e 2119 -x -f gcc {} +