[PATCH proxmox-perl-rs v2] make: improve library path detection for tests

["Max R. Carrara" <m.carrara@proxmox.com>]

Export LD_LIBRARY_PATH containing the absolute path to the current
Rust target's directory in the top-level Makefile.

This allows the bootstrap machinery in Proxmox::Lib::PVE to find the
compiled .so file when testing and building.

Since it's not needed anymore, remove the `sed` workaround in the
`all` target.

Signed-off-by: Max R. Carrara <m.carrara@proxmox.com>
---
Changes v1 --> v2:
  * Use 'improve' instead of 'fix' in the commit message because 'fix'
    implies that something was broken, which it wasn't
  * Use LD_LIBRARY_PATH instead of PERL5LIB, as the latter didn't
    actually work -- was a false positive on my side, as the .so file
    installed on my workstation was used

Also, tested this more thoroughly this time around by adding `panic!()`
statements in parts of the resource scheduling source code so that I
could really see that the freshly compiled library is being used.
Checked this for both `make check` and `make deb`, so the built .so file
should always get picked up.

 pve-rs/Makefile      | 7 +++----
 pve-rs/test/Makefile | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/pve-rs/Makefile b/pve-rs/Makefile
index bb1cd2d..c7f2aa4 100644
--- a/pve-rs/Makefile
+++ b/pve-rs/Makefile
@@ -48,6 +48,9 @@ else
 TARGET_DIR=debug
 endif

+# Used to tell tests where the compiled .so file resides
+export LD_LIBRARY_PATH=$(shell pwd)/target/$(TARGET_DIR)
+
 # better way to automate this without a massively annoying cargo-metatdata + jq
 # chain that spits out errors?
 PROXMOX_DOC_CRATES := \
@@ -75,10 +78,6 @@ PROXMOX_DOC_URL_FLAGS = $(foreach crate,$(PROXMOX_DOC_CRATES),$(call make_rustdo

 all: PVE
 	cargo build $(CARGO_BUILD_ARGS)
-	mkdir -p test/Proxmox/Lib
-	sed -r -e \
-	  's@^sub libfile.*$$@sub libfile { "$(shell pwd)/target/$(TARGET_DIR)/libpve_rs.so"; }@' \
-	  Proxmox/Lib/PVE.pm >test/Proxmox/Lib/PVE.pm

 Proxmox: Proxmox/Lib/PVE.pm
 PVE: $(PERLMOD_PACKAGE_FILES)
diff --git a/pve-rs/test/Makefile b/pve-rs/test/Makefile
index 29dc955..2399b86 100644
--- a/pve-rs/test/Makefile
+++ b/pve-rs/test/Makefile
@@ -1,5 +1,5 @@
 .PHONY: test
-test: Proxmox/Lib/PVE.pm
+test:
 	@echo "-- running pve-rs tests --"
 	perl -I. -I.. -I../.. ./resource_scheduling.pl

--
2.47.3