build-package: mv code for setting up src and build to to its own function

%ci:no-build

build-package.sh

@@ -103,6 +103,10 @@ source "$TERMUX_SCRIPTDIR/scripts/build/termux_get_repo_files.sh"
 # shellcheck source=scripts/build/termux_step_get_dependencies.sh
 source "$TERMUX_SCRIPTDIR/scripts/build/termux_step_get_dependencies.sh"
 
+# Remove old src and build folders and create new ones
+# shellcheck source=scripts/build/termux_step_setup_build_folders.sh
+source "$TERMUX_SCRIPTDIR/scripts/build/termux_step_setup_build_folders.sh"
+
 # Source the package build script and start building. Not to be overridden by packages.
 # shellcheck source=scripts/build/termux_step_start_build.sh
 source "$TERMUX_SCRIPTDIR/scripts/build/termux_step_start_build.sh"
@@ -373,7 +377,13 @@ while (($# > 0)); do
 
 		termux_step_setup_variables
 		termux_step_handle_buildarch
+
+		if [ "$TERMUX_CONTINUE_BUILD" == "false" ]; then
+			termux_step_setup_build_folders
+		fi
+
 		termux_step_start_build
+
 		if [ "$TERMUX_CONTINUE_BUILD" == "false" ]; then
 			termux_step_get_dependencies
 		fi

scripts/build/termux_step_setup_build_folders.sh

@@ -0,0 +1,25 @@
+termux_step_setup_build_folders() {
+	# Following directories may contain files with read-only permissions which
+	# makes them undeletable. We need to fix that.
+	[ -d "$TERMUX_PKG_BUILDDIR" ] && chmod +w -R "$TERMUX_PKG_BUILDDIR"
+	[ -d "$TERMUX_PKG_SRCDIR" ] && chmod +w -R "$TERMUX_PKG_SRCDIR"
+
+	# Cleanup old build state:
+	rm -Rf "$TERMUX_PKG_BUILDDIR" \
+		"$TERMUX_PKG_SRCDIR"
+
+	# Cleanup old packaging state:
+	rm -Rf "$TERMUX_PKG_PACKAGEDIR" \
+		"$TERMUX_PKG_TMPDIR" \
+		"$TERMUX_PKG_MASSAGEDIR"
+
+	# Ensure folders present (but not $TERMUX_PKG_SRCDIR, it will be created in build)
+	mkdir -p "$TERMUX_COMMON_CACHEDIR" \
+		 "$TERMUX_DEBDIR" \
+		 "$TERMUX_PKG_BUILDDIR" \
+		 "$TERMUX_PKG_PACKAGEDIR" \
+		 "$TERMUX_PKG_TMPDIR" \
+		 "$TERMUX_PKG_CACHEDIR" \
+		 "$TERMUX_PKG_MASSAGEDIR" \
+		 $TERMUX_PREFIX/{bin,etc,lib,libexec,share,share/LICENSES,tmp,include}
+}

scripts/build/termux_step_start_build.sh

@@ -92,29 +92,6 @@ termux_step_start_build() {
 			-e "s|@TERMUX_ARCH@|$TERMUX_ARCH|g" > $TERMUX_PREFIX/bin/llvm-config
 		chmod 755 $TERMUX_PREFIX/bin/llvm-config
 	fi
-	# Following directories may contain files with read-only permissions which
-	# makes them undeletable. We need to fix that.
-	[ -d "$TERMUX_PKG_BUILDDIR" ] && chmod +w -R "$TERMUX_PKG_BUILDDIR"
-	[ -d "$TERMUX_PKG_SRCDIR" ] && chmod +w -R "$TERMUX_PKG_SRCDIR"
-
-	# Cleanup old build state:
-	rm -Rf "$TERMUX_PKG_BUILDDIR" \
-		"$TERMUX_PKG_SRCDIR"
-
-	# Cleanup old packaging state:
-	rm -Rf "$TERMUX_PKG_PACKAGEDIR" \
-		"$TERMUX_PKG_TMPDIR" \
-		"$TERMUX_PKG_MASSAGEDIR"
-
-	# Ensure folders present (but not $TERMUX_PKG_SRCDIR, it will be created in build)
-	mkdir -p "$TERMUX_COMMON_CACHEDIR" \
-		 "$TERMUX_DEBDIR" \
-		 "$TERMUX_PKG_BUILDDIR" \
-		 "$TERMUX_PKG_PACKAGEDIR" \
-		 "$TERMUX_PKG_TMPDIR" \
-		 "$TERMUX_PKG_CACHEDIR" \
-		 "$TERMUX_PKG_MASSAGEDIR" \
-		 $TERMUX_PREFIX/{bin,etc,lib,libexec,share,share/LICENSES,tmp,include}
 
 	# Make $TERMUX_PREFIX/bin/sh executable on the builder, so that build
 	# scripts can assume that it works on both builder and host later on: