Make pkg-config files relocatable post-installation

src/Auditor.jl

@@ -209,6 +209,39 @@ function audit(prefix::Prefix, src_name::AbstractString = "";
         rm(f; force=true)
     end
 
+    # Make sure that `prefix` in pkg-config files use a relative prefix
+    pc_files = collect_files(prefix, endswith(".pc"))
+    pc_re = r"^prefix=(/.*)$"
+    for f in pc_files
+        # We want to replace every instance of `prefix=...` with
+        # `prefix=${pcfiledir}/../..`
+        changed = false
+        buf = IOBuffer()
+        for l in readlines(f)
+            m = match(pc_re, l)
+            if m !== nothing
+                # dealing with an absolute path we need to relativize;
+                # determine how many directories we need to go up.
+                dir = m.captures[1]
+                f_rel = relpath(f, prefix.path)
+                ndirs = count('/', f_rel)
+                prefix_rel = join([".." for _ in 1:ndirs], "/")
+                l = "prefix=\${pcfiledir}/$prefix_rel"
+                changed = true
+            end
+            println(buf, l)
+        end
+        str = String(take!(buf))
+
+        if changed
+            # Overwrite file
+            if verbose
+                @info("Relocatize pkg-config file $f")
+            end
+            write(f, str)
+        end
+    end
+
     if Sys.iswindows(platform)
         # We also cannot allow any symlinks in Windows because it requires
         # Admin privileges to create them.  Orz

test/auditing.jl

@@ -332,6 +332,59 @@ end
     end
 end
 
+@testset "Auditor - relocatable pkg-config prefix" begin
+    for os in ["linux", "macos", "freebsd", "windows"]
+        platform = Platform("x86_64", os)
+        mktempdir() do build_path
+            build_output_meta = nothing
+            @test_logs (:info, r"Relocatize pkg-config file .*/destdir/lib/pkgconfig/libfoo.pc$") match_mode=:any begin
+                build_output_meta = autobuild(
+                    build_path,
+                    "libfoo",
+                    v"1.0.0",
+                    # Copy in the libfoo sources
+                    [DirectorySource(build_tests_dir)],
+                    # Build libfoo using autotools to create a real .la file, and also
+                    # create a fake .la file (which should not be removed).  Create also a
+                    # symlink libqux.la -> libfoo.la, which will be broken after libfoo.la
+                    # has been deleted: remove libqux.la as well
+                    libfoo_autotools_script * raw"""
+                    touch ${prefix}/lib/libbar.la
+                    ln -s ${prefix}/lib/libfoo.la ${prefix}/lib/libqux.la
+                    """,
+                    # Build for our platform
+                    [platform],
+                    # The products we expect to be build
+                    libfoo_products,
+                    # No dependencies
+                    Dependency[];
+                    verbose = true,
+                )
+            end
+
+            # Extract our platform's build
+            @test haskey(build_output_meta, platform)
+            tarball_path, tarball_hash = build_output_meta[platform][1:2]
+            @test isfile(tarball_path)
+
+            # Unpack it somewhere else
+            @test verify(tarball_path, tarball_hash)
+            testdir = joinpath(build_path, "testdir")
+            mkdir(testdir)
+            unpack(tarball_path, testdir)
+            prefix = Prefix(testdir)
+
+            # Test that `libfoo.pc` exists and contains a relative prefix
+            # TODO: actually use pkg-config with PKG_CONFIG_PATH
+            contents = list_tarball_files(tarball_path)
+            @test "lib/pkgconfig/libfoo.pc" in contents
+            libfoo_pc = read(joinpath(testdir, "lib/pkgconfig/libfoo.pc"), String)
+            @test contains(libfoo_pc, "prefix=\${pcfiledir}")
+            @test !contains(libfoo_pc, "/workplace/destdir")
+        end
+    end
+end
+
 @testset "Auditor - .dll moving" begin
     for platform in [Platform("x86_64", "windows")]
         mktempdir() do build_path

test/build_tests/libfoo/CMakeLists.txt

@@ -15,6 +15,7 @@ elseif (UNIX)
     set_target_properties(fooifier PROPERTIES INSTALL_RPATH "$ORIGIN/../lib")
 endif()
 
+install(FILES libfoo.pc DESTINATION lib/pkgconfig)
 install(TARGETS foo DESTINATION lib)
 install(TARGETS fooFramework DESTINATION lib)
 install(TARGETS fooifier RUNTIME DESTINATION bin)

test/build_tests/libfoo/Makefile.am

@@ -1,5 +1,8 @@
 ACLOCAL_AMFLAGS = -I m4
 
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libfoo.pc
+
 lib_LTLIBRARIES = libfoo.la
 libfoo_la_SOURCES = libfoo.c
 libfoo_la_LDFLAGS = -no-undefined

test/build_tests/libfoo/libfoo.pc

@@ -0,0 +1,10 @@
+prefix=/workplace/destdir
+exec_prefix=${prefix}
+includedir=${prefix}/include
+libdir=${exec_prefix}/lib
+
+Name: Libfoo
+Description: Foo library, now without bar!
+Version: 1.0.0
+Cflags: -I${includedir}
+Libs: -L${libdir} -lfoo

test/build_tests/libfoo/meson.build

@@ -16,3 +16,5 @@ endif
 executable('fooifier', 'fooifier.cpp',
 	   link_with : libfoo, install : true,
 	   install_rpath : rpath_dir)
+
+install_data('libfoo.pc', install_dir: get_option('libdir')/'pkgconfig')