From: Björn Esser <b.es...@pengutronix.de>

This is a dummy package to specify and install required Node.js packages for the
target system.

The management of those packages and their dependencies is handled with
Yarn (run through host-nodejs) to maintain a reproducible offline cache that is
stored in local_src/nodejs_packages.

Signed-off-by: Björn Esser <b.es...@pengutronix.de>
[uol: adjusted commit message and Kconfig menu file's help texts & fixed
NODEJS_PACKAGES_URL]
Signed-off-by: Ulrich Ölmann <u.oelm...@pengutronix.de>
---
Range-diff of v4 against v3:
3:  2a6984f0297b ! 3:  ccd2b44a8d92 nodejs_packages: New package.
    @@ Metadata
     Author: Björn Esser <b.es...@pengutronix.de>

      ## Commit message ##
    -    nodejs_packages: New package.
    +    nodejs_packages: new package

    -    This is a dummy package to specifiy and install the required
    -    Node.js packages for the target system.
    +    This is a dummy package to specify and install required Node.js 
packages for the
    +    target system.

    -    The management of the Node.js packages and their dependencies
    -    are handled with Yarn (run through host-nodejs) to maintain
    -    a reprocible offline cache.
    -
    -    The cache is stored in local_src/nodejs_packages, which must
    -    be an existing path inside of the BSP.
    +    The management of those packages and their dependencies is handled with
    +    Yarn (run through host-nodejs) to maintain a reproducible offline 
cache that is
    +    stored in local_src/nodejs_packages.

         Signed-off-by: Björn Esser <b.es...@pengutronix.de>
    +    [uol: adjusted commit message and Kconfig menu file's help texts & 
fixed
    +    NODEJS_PACKAGES_URL]
    +    Signed-off-by: Ulrich Ölmann <u.oelm...@pengutronix.de>

      ## rules/nodejs_packages.in (new) ##
     @@
    @@ rules/nodejs_packages.in (new)
     +    Reproducibly install Node.js packages that will be available
     +    system-wide on the target.
     +
    -+    You MUST specify at least one Node.js package in the shown
    -+    submenu after enabling this option.
    ++    You MUST specify at least one Node.js package in the submenu that is
    ++    shown after enabling this option.
     +
     +
     +if NODEJS_PACKAGES
    @@ rules/nodejs_packages.in (new)
     +  string
     +  prompt "Node.js packages to install"
     +  help
    -+    A white-space separated list of Node.js packages including
    -+    its version (e.g. express@4.17.x). npm semvers are fully
    -+    supported.
    ++    A white-space separated list of Node.js packages including their
    ++    versions (e.g. express@4.17.x or socket.io@'>=2.1.0 <=2.3.0'). NPM
    ++    semvers are fully supported, see [1].
     +
     +    The packages are managed with Yarn and are guaranteed to be
    -+    reproducible and immutable as long as the download location
    -+    stays accessible or the download-cache does not get altered.
    ++    reproducible and immutable as long as the download location stays
    ++    accessible or the offline cache is not altered.
    ++
    ++    If the list of Node.js packages to be installed has been populated for
    ++    the first time or if it has been modified later on one needs to
    ++    (re-)build this package to download the desired Node.js packages and
    ++    update the offline cache. Afterwards it is highly recommended to
    ++    commit the path '${PTXDIST_WORKSPACE}/local_src/nodejs_packages/' into
    ++    the version control system and to lock the package cache.
     +
    -+    After downloading the packages and creating the package cache,
    -+    by building this package the first time after altering the list
    -+    of installed packages, it is highly recommended to commit the
    -+    path: './local_src/nodejs_packages/' into the git repository
    -+    and to lock the package cache.
    ++    As a prerequisite the path '${PTXDIST_WORKSPACE}/local_src/nodejs_
    ++    packages/' must exist in the BSP *before* building this package.
     +
    -+    Also the path: './local_src/nodejs_packages/' must exist in the
    -+    BSP *before* before building this package.
    ++    [1] https://legacy.yarnpkg.com/en/docs/dependency-versions/
     +
     +config NODEJS_PACKAGES_OFFLINE
     +  bool
    -+  prompt "lock package cache for offline / production use"
    ++  prompt "lock offline cache for offline/production use"
     +  help
    -+    This option locks the cache for installing the nodejs
    -+    packages and performs their installation during the
    -+    build of the BSP without any need for internet connectivity.
    ++    This option locks the offline cache for installing the nodejs packages
    ++    and allows their installation during the build of the BSP without any
    ++    need for internet connectivity.
     +
    -+    Checking this option is highly recommended for production use.
    ++    Enabling this option is highly recommended for production use.
     +
    -+    Do NOT forget to commit the path: './local_src/nodejs_packages/'
    -+    into the BSP's git repository!
    ++    Do NOT forget to commit the path '${PTXDIST_WORKSPACE}/local_src/
    ++    nodejs_packages/' into the BSP's version control system!
     +
     +endif

    @@ rules/nodejs_packages.make (new)
     +NODEJS_PACKAGES_VERSION   := 0.0.1
     +NODEJS_PACKAGES           := nodejs_packages-$(NODEJS_PACKAGES_VERSION)
     +NODEJS_PACKAGES_LOCAL     := local_src/nodejs_packages
    -+NODEJS_PACKAGES_URL       := lndir://$(NODEJS_PACKAGES_LOCAL)
    ++NODEJS_PACKAGES_URL       := 
lndir://$(PTXDIST_WORKSPACE)/$(NODEJS_PACKAGES_LOCAL)
     +NODEJS_PACKAGES_DIR       := $(BUILDDIR)/$(NODEJS_PACKAGES)
     +NODEJS_PACKAGES_CACHE     := 
$(PTXDIST_WORKSPACE)/$(NODEJS_PACKAGES_LOCAL)/yarn_cache
     +NODEJS_PACKAGES_LICENSE   := unknown


 rules/nodejs_packages.in   | 55 +++++++++++++++++++++++
 rules/nodejs_packages.make | 90 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 rules/nodejs_packages.in
 create mode 100644 rules/nodejs_packages.make

diff --git a/rules/nodejs_packages.in b/rules/nodejs_packages.in
new file mode 100644
index 000000000000..e6d33d30aaa9
--- /dev/null
+++ b/rules/nodejs_packages.in
@@ -0,0 +1,55 @@
+## SECTION=bytecode_engines
+
+menuconfig NODEJS_PACKAGES
+       tristate
+       select HOST_YARN
+       select NODEJS
+       prompt "Node.js packages (target)     "
+       help
+         Reproducibly install Node.js packages that will be available
+         system-wide on the target.
+
+         You MUST specify at least one Node.js package in the submenu that is
+         shown after enabling this option.
+
+
+if NODEJS_PACKAGES
+
+config NODEJS_PACKAGES_LIST
+       string
+       prompt "Node.js packages to install"
+       help
+         A white-space separated list of Node.js packages including their
+         versions (e.g. express@4.17.x or socket.io@'>=2.1.0 <=2.3.0'). NPM
+         semvers are fully supported, see [1].
+
+         The packages are managed with Yarn and are guaranteed to be
+         reproducible and immutable as long as the download location stays
+         accessible or the offline cache is not altered.
+
+         If the list of Node.js packages to be installed has been populated for
+         the first time or if it has been modified later on one needs to
+         (re-)build this package to download the desired Node.js packages and
+         update the offline cache. Afterwards it is highly recommended to
+         commit the path '${PTXDIST_WORKSPACE}/local_src/nodejs_packages/' into
+         the version control system and to lock the package cache.
+
+         As a prerequisite the path '${PTXDIST_WORKSPACE}/local_src/nodejs_
+         packages/' must exist in the BSP *before* building this package.
+
+         [1] https://legacy.yarnpkg.com/en/docs/dependency-versions/
+
+config NODEJS_PACKAGES_OFFLINE
+       bool
+       prompt "lock offline cache for offline/production use"
+       help
+         This option locks the offline cache for installing the nodejs packages
+         and allows their installation during the build of the BSP without any
+         need for internet connectivity.
+
+         Enabling this option is highly recommended for production use.
+
+         Do NOT forget to commit the path '${PTXDIST_WORKSPACE}/local_src/
+         nodejs_packages/' into the BSP's version control system!
+
+endif
diff --git a/rules/nodejs_packages.make b/rules/nodejs_packages.make
new file mode 100644
index 000000000000..514db3252279
--- /dev/null
+++ b/rules/nodejs_packages.make
@@ -0,0 +1,90 @@
+# -*-makefile-*-
+#
+# Copyright (C) 2020 by Bjoern Esser <b...@pengutronix.de>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+#
+# We provide this package
+#
+PACKAGES-$(PTXCONF_NODEJS_PACKAGES) += nodejs_packages
+
+#
+# Paths and names
+#
+NODEJS_PACKAGES_VERSION        := 0.0.1
+NODEJS_PACKAGES                := nodejs_packages-$(NODEJS_PACKAGES_VERSION)
+NODEJS_PACKAGES_LOCAL  := local_src/nodejs_packages
+NODEJS_PACKAGES_URL    := lndir://$(PTXDIST_WORKSPACE)/$(NODEJS_PACKAGES_LOCAL)
+NODEJS_PACKAGES_DIR    := $(BUILDDIR)/$(NODEJS_PACKAGES)
+NODEJS_PACKAGES_CACHE  := 
$(PTXDIST_WORKSPACE)/$(NODEJS_PACKAGES_LOCAL)/yarn_cache
+NODEJS_PACKAGES_LICENSE        := unknown
+
+NODEJS_PACKAGES_LIST   := $(call remove_quotes, 
$(PTXCONF_NODEJS_PACKAGES_LIST))
+
+YARN_LOCK      := $(PTXDIST_WORKSPACE)/$(NODEJS_PACKAGES_LOCAL)/yarn.lock
+YARN_OPTS      := \
+       --cwd "$(NODEJS_PACKAGES_DIR)" \
+       --cache-folder "$(NODEJS_PACKAGES_CACHE)" \
+       --link-duplicates \
+       --production=true
+
+ifdef PTXCONF_NODEJS_PACKAGES_OFFLINE
+YARN_OPTS      += \
+       --frozen-lockfile \
+       --offline
+endif
+
+# ----------------------------------------------------------------------------
+# Compile
+# ----------------------------------------------------------------------------
+
+$(STATEDIR)/nodejs_packages.compile:
+       @$(call targetinfo)
+       mkdir -p $(NODEJS_PACKAGES_CACHE)
+       printf "{ \
+               \"name\": \"nodejs_packages\", \
+               \"version\": \"$(NODEJS_PACKAGES_VERSION)\", \
+               \"license\": \"UNLICENSED\", \
+               \"private\": true \
+       }" > $(NODEJS_PACKAGES_DIR)/package.json
+       if [[ ! -f $(YARN_LOCK) ]]; then \
+               touch $(YARN_LOCK); \
+               ln -fs $(YARN_LOCK) $(NODEJS_PACKAGES_DIR)/yarn.lock; \
+       fi
+       yarn $(YARN_OPTS) add $(NODEJS_PACKAGES_LIST)
+       find $(NODEJS_PACKAGES_CACHE) -type f -name '.yarn-tarball.tgz' -delete
+       @$(call touch)
+
+# ----------------------------------------------------------------------------
+# Install
+# ----------------------------------------------------------------------------
+
+$(STATEDIR)/nodejs_packages.install:
+       @$(call targetinfo)
+       install -dm 0755 $(NODEJS_PACKAGES_PKGDIR)/usr/lib
+       cp -pr $(NODEJS_PACKAGES_DIR)/node_modules 
$(NODEJS_PACKAGES_PKGDIR)/usr/lib
+       @$(call touch)
+
+# ----------------------------------------------------------------------------
+# Target-Install
+# ----------------------------------------------------------------------------
+
+$(STATEDIR)/nodejs_packages.targetinstall:
+       @$(call targetinfo)
+
+       @$(call install_init, nodejs_packages)
+       @$(call install_fixup, nodejs_packages,PRIORITY,optional)
+       @$(call install_fixup, nodejs_packages,SECTION,base)
+       @$(call install_fixup, nodejs_packages,AUTHOR,"Bjoern Esser 
<b...@pengutronix.de>")
+       @$(call install_fixup, nodejs_packages,DESCRIPTION,missing)
+
+       $(call install_tree, nodejs_packages, 0, 0, -, /usr/lib/node_modules/)
+
+       @$(call install_finish, nodejs_packages)
+
+       @$(call touch)
+
+# vim: syntax=make
-- 
2.25.0


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