From: Alex Kiernan <alex.kiernan@...>

Since disable network was added cargo configurations which reference git
repos fail as they attempt to fetch across the network as part of
do_compile, even if EXTRA_OECARGO_PATHS to add them as part of `paths`
is used, as this is documented as only working for packages which exist
in crates.io.

Add parsing of the SRC_URIs for git repos and include `[patch]` sections
to redirect to the checked out source repos which the bitbake fetcher
has already populated.

There are still cases which don't work - if you have multiple copies of
the same repo with different revisions, there's currently no way to
represent that and anything using a repo which has a virtual manifest
will fail to build (see https://github.com/rust-lang/cargo/issues/4934).

Signed-off-by: Alex Kiernan <alex.kiernan@...>
---
meta/classes-recipe/cargo_common.bbclass | 30 ++++++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/meta/classes-recipe/cargo_common.bbclass b/meta/classes-recipe/cargo_common.bbclass
index f503a001dd..63b1382908 100644
--- a/meta/classes-recipe/cargo_common.bbclass
+++ b/meta/classes-recipe/cargo_common.bbclass
@@ -116,6 +116,36 @@ cargo_common_do_configure () {
EOF
}

+python cargo_common_do_patch_paths() {
+ cargo_config = os.path.join(d.getVar("CARGO_HOME"), "config")
+ if not os.path.exists(cargo_config):
+ return
+
+ src_uri = (d.getVar('SRC_URI') or "").split()
+ if len(src_uri) == 0:
+ return
+
+ patches = dict()
+ workdir = d.getVar('WORKDIR')
+ fetcher = bb.fetch2.Fetch(src_uri, d)
+ for url in fetcher.urls:
+ ud = fetcher.ud[url]
+ if ud.type == 'git':
+ name = ud.parm.get('name')
+ destsuffix = ud.parm.get('destsuffix')
+ if name is not None and destsuffix is not None:
+ repo = '%s://%s%s' % (ud.proto, ud.host, ud.path)
+ path = '%s = { path = "%s" }' % (name, os.path.join(workdir, destsuffix))
+ patches.setdefault(repo, []).append(path)
+
+ with open(cargo_config, "a+") as config:
+ for k, v in patches.items():
+ print('\n[patch."%s"]' % k, file=config)
+ for name in v:
+ print(name, file=config)
+}
+do_configure[postfuncs] += "cargo_common_do_patch_paths"
+
oe_cargo_fix_env () {
export CC="${RUST_TARGET_CC}"
export CXX="${RUST_TARGET_CXX}"
--
2.34.1