meson: we can now build libfetchers!

Change-Id: Ic3a64bbc6bb1a77d01652f339f62b7f301e6e7dc

meson.build

@@ -193,3 +193,4 @@ add_project_arguments(
 subdir('src/libutil')
 # Load-bearing order. libstore depends on libutil (includes).
 subdir('src/libstore')
+subdir('src/libfetchers')

src/libfetchers/meson.build

@@ -0,0 +1,23 @@
+libfetchers_sources = files(
+  'attrs.cc',
+  'cache.cc',
+  'fetch-settings.cc',
+  'fetch-to-store.cc',
+  'fetchers.cc',
+  'git.cc',
+  'github.cc',
+  'indirect.cc',
+  'mercurial.cc',
+  'path.cc',
+  'registry.cc',
+  'tarball.cc',
+)
+
+library(
+  'nixfetchers',
+  libfetchers_sources,
+  dependencies : [
+    liblixstore,
+    liblixutil,
+  ],
+)

src/libstore/meson.build

@@ -106,7 +106,7 @@ foreach name, value : cpp_str_defines
   ]
 endforeach
 
-library(
+libstore = library(
   'nixstore',
   libstore_sources,
   schema_sql_gen,
@@ -123,3 +123,9 @@ library(
   ],
   cpp_args : cpp_args,
 )
+
+# Used by libfetchers.
+liblixstore = declare_dependency(
+  include_directories : include_directories('.'),
+  link_with : libstore,
+)

src/libutil/meson.build

@@ -49,6 +49,7 @@ libutil = library(
   implicit_include_directories : true,
 )
 
+# Used by libstore and libfetchers.
 liblixutil = declare_dependency(
   include_directories : include_directories('.'),
   link_with : libutil