build: Replace missing crates.io dependency with Purism-hosted one

Cargo.deps.online

@@ -0,0 +1,4 @@
+# Dependencies which are only used with online, crates.io builds.
+[patch.crates-io]
+# Dependency was yanked, but gio 0.7 needs it.
+fragile = { git = "https://source.puri.sm/dorota.czaplejewicz/fragile.git", tag = "0.3.0" }

debian/cargo/config

@@ -9,4 +9,3 @@ replace-with = 'vendored-sources'
 
 [source.vendored-sources]
 directory = '/usr/share/cargo/registry'
-

debian/rules

@@ -38,6 +38,6 @@ endif
 # causing Cargo to refuse to build with a crates.io copy
 override_dh_auto_configure:
 	[ ! -f Cargo.lock ] || rm Cargo.lock
-	dh_auto_configure -- -Dnewer=$(newer)
+	dh_auto_configure -- -Dnewer=$(newer) -Donline=false
 
 override_dh_autoreconf:

meson.build

@@ -96,19 +96,23 @@ cargo_toml_base = configure_file(
     configuration: path_data,
 )
 
-
+cargo_patch = []
-cargo_deps = files('Cargo.deps')
 
 if get_option('newer') == true
     cargo_build_flags += ['--features', 'glib_v0_14']
     cargo_deps = files('Cargo.deps.newer')
+else
+    cargo_deps = files('Cargo.deps')
+    if get_option('online') == true
+        cargo_patch = [files('Cargo.deps.online')]
+    endif
 endif
 
 cat = find_program('cat')
 cargo_toml = custom_target(
     'Cargo.toml',
     output: 'Cargo.toml',
-    command: [cat, cargo_toml_base, cargo_deps],
+    command: [cat, cargo_toml_base, cargo_deps] + cargo_patch,
     capture: true,
 )
 

meson_options.txt

@@ -11,6 +11,10 @@ option('newer',
        type: 'boolean', value: false,
        description: 'Build with dependencies newer than those of Byzantium')
 
+option('online',
+       type: 'boolean', value: true,
+       description: 'Pull packages from the internet while building, as opposed to a local regstry.')
+       
 option('strict',
        type: 'boolean', value: true,
        description: 'Turn more warnings into errors')