[ptxdist] [PATCH v4 3/4] scripts: add helper to inject files into a source directory

[Michael Riesch <michael.riesch@wolfvision.net>]

Some packages may require certain files that are maintained
or generated outside of their source repository. For example,
binary firmware blobs could be excluded from the sources due
to licensing issues. Add a helper that allows to inject certain
files into the source directory (usually in the prepare stage).

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
---
 rules/post/ptxd_make_world_inject.make | 19 ++++++++++++
 scripts/lib/ptxd_make_world_inject.sh  | 42 ++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 rules/post/ptxd_make_world_inject.make
 create mode 100644 scripts/lib/ptxd_make_world_inject.sh

diff --git a/rules/post/ptxd_make_world_inject.make b/rules/post/ptxd_make_world_inject.make
new file mode 100644
index 000000000..b7d28e92f
--- /dev/null
+++ b/rules/post/ptxd_make_world_inject.make
@@ -0,0 +1,19 @@
+# -*-makefile-*-
+#
+# Copyright (C) 2021 by Michael Riesch <michael.riesch@wolfvision.net>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+world/inject/env = \
+	$(call world/env, $(1)) \
+	pkg_inject_path="$($(1)_INJECT_PATH)" \
+	pkg_inject_files="$($(1)_INJECT_FILES)" \
+	pkg_source="$($(1)_DIR)"
+
+world/inject = \
+	$(call world/inject/env,$(strip $(1))) \
+	ptxd_make_world_inject
+
+# vim: syntax=make
diff --git a/scripts/lib/ptxd_make_world_inject.sh b/scripts/lib/ptxd_make_world_inject.sh
new file mode 100644
index 000000000..c2e45ad42
--- /dev/null
+++ b/scripts/lib/ptxd_make_world_inject.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+#
+# Copyright (C) 2021 by Michael Riesch <michael.riesch@wolfvision.net>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+ptxd_make_inject() {
+    local source target
+
+    source="$(echo ${inject_file} | cut -d ":" -f 1)"
+    target="${pkg_source}/$(echo ${inject_file} | cut -d ":" -f 2)"
+    if [ -z "${target}" ]; then
+	target="${source}"
+    fi
+
+    if [[ "${source}" =~ ^/.* ]]; then
+	ptxd_bailout "'${source}' must not be an absolute path!" \
+	    "Use <PKG>_INJECT_PATH to specify the search path."
+    fi
+
+    if ! ptxd_in_path pkg_inject_path "${source}"; then
+	ptxd_bailout "Blob '${source}' not found in '${pkg_inject_path}'."
+    fi
+    source="${ptxd_reply}"
+
+    echo -e "\nInject file $(ptxd_print_path ${source}) into" \
+	 "$(ptxd_print_path ${target})..."
+    cp ${source} ${target}
+}
+export -f ptxd_make_inject
+
+
+ptxd_make_world_inject() {
+    ptxd_make_world_init || break
+
+    for inject_file in ${pkg_inject_files}; do
+	ptxd_make_inject || break
+    done
+}
+export -f ptxd_make_world_inject
-- 
2.30.2


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