pkg-infra: add user-supplied step-hooks

Allow user to supply their own step-hooks by passing a variable
on the make command-line:
    make BR2_INSTRUMENTATION_SCRIPTS=/path/to/my/script

This can be useful to run site-specific actions at each step of the
build process, such as logging installed, removed or modified files,
do sanity checks on installed files...

It is possible to call more than one script, by passing a space-separated
lists of scripts to call.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Reviewed-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/docs/manual/debugging-buildroot.txt b/docs/manual/debugging-buildroot.txt
new file mode 100644 (file)
index 0000000..5fa05b0
--- /dev/null
+++ b/docs/manual/debugging-buildroot.txt
@@ -0,0 +1,33 @@
+// -*- mode:doc; -*-
+// vim: set syntax=asciidoc:
+
+[[debugging-buildroot]]
+
+Debugging Buildroot
+-------------------
+
+It is possible to instrument the steps +Buildroot+ does when building
+packages. Define the variable +BR2_INSTRUMENTATION_SCRIPTS+ to contain
+the path of one or more scripts (or other executables), in a
+space-separated list, you want called before and after each step. The
+scripts are called in sequence, with three parameters:
+
+  - +start+ or +end+ to denote the start (resp. the end) of a step;
+  - the name of the step about to be started, or which just ended.
+  - the name of the package
+
+For example :
+
+----
+make BR2_INSTRUMENTATION_SCRIPTS="/path/to/my/script1 /path/to/my/script2"
+----
+
+That script has access to the following variables:
+
+  - +BUILDROOT_CONFIG+: the path to the Buildroot .config file
+  - +HOST_DIR+, +STAGING_DIR+, +TARGET_DIR+: see
+    xref:generic-package-reference[]
+  - +BUILD_DIR+: the directory where packages are extracted and built
+  - +BINARIES_DIR+: the place where all binary files (aka images) are
+    stored
+  - +BASE_DIR+: the base output directory

diff --git a/docs/manual/developer-guide.txt b/docs/manual/developer-guide.txt
index 8125ad5ca3790a358a1e1a82a207531ccfc83c25..9054deef801005837e8e7afb8035480940112947 100644 (file)
--- a/docs/manual/developer-guide.txt
+++ b/docs/manual/developer-guide.txt
@@ -11,3 +11,5 @@ include::adding-packages.txt[]
 include::patch-policy.txt[]
 
 include::download-infra.txt[]
+
+include::debugging-buildroot.txt[]

diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
index 619974e167dff0a59b7119458e636f1051f9a7d0..fc6e8c64d190aab077eefe15557d786b4977d9cd 100644 (file)
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -55,6 +55,15 @@ define step_time
 endef
 GLOBAL_INSTRUMENTATION_HOOKS += step_time
 
+# User-supplied script
+define step_user
+       @$(foreach user_hook, $(BR2_INSTRUMENTATION_SCRIPTS), \
+               $(USER_HOOKS_EXTRA_ENV) $(user_hook) "$(1)" "$(2)" "$(3)"$(sep))
+endef
+ifneq ($(BR2_INSTRUMENTATION_SCRIPTS),)
+GLOBAL_INSTRUMENTATION_HOOKS += step_user
+endif
+
 ################################################################################
 # Implicit targets -- produce a stamp file for each step of a package build
 ################################################################################