Bug 10867

I've got a custom fetcher for Rust packages (which are called crates). It is very similar to the NPM fetcher. If I attempt to use SRCPV then bitbake fails when it hits one of my crate:// URLs. Which works just fine otherwise. It seems like bitbake is not fully parsing my recipe to load my fetcher before it resolves SRCPV. I am not sure what version of BitBake I'm using since I am using Yocto master and bitbake --version reports 1.32.0 which is older than any of the drop down options above.

The fetcher code is here: https://github.com/meta-rust/meta-rust/blob/master/lib/crate.py
The bbclass that is inherited to load that is here: https://github.com/meta-rust/meta-rust/blob/master/classes/crate-fetch.bbclass
The bbclass that is inherited by recipes and in turn inherits the above bbclass is here: https://github.com/meta-rust/meta-rust/blob/master/classes/cargo.bbclass
The recipe that fails is here: https://github.com/cardoe/meta-rust/blob/rustfmt-git/recipes-example/rustfmt/rustfmt_git.bb


The error is as follows:

ERROR: ExpansionError during parsing /var/build/poky/meta-rust/recipes-example/rustfmt/rustfmt_git.bb
Traceback (most recent call last):
  File "/var/build/poky/bitbake/lib/bb/data_smart.py", line 412, in DataSmart.expandWithRefs(s="${@bb.parse.BBHandler.vars_from_file(d.getVar('FILE', False),d)[1] or '1.0'}.${SRCPV}", varname='PV'):
                 try:
    >                s = __expand_var_regexp__.sub(varparse.var_sub, s)
                     try:
  File "/var/build/poky/bitbake/lib/bb/data_smart.py", line 111, in VariableParse.var_sub(match=<_sre.SRE_Match object; span=(77, 85), match='${SRCPV}'>):
                 else:
    >                var = self.d.getVarFlag(key, "_content")
                 self.references.add(key)
  File "/var/build/poky/bitbake/lib/bb/data_smart.py", line 773, in DataSmart.getVarFlag(var='SRCPV', flag='_content', expand=True, noweakdefault=False, parsing=False):
                     cachename = var + "[" + flag + "]"
    >            value = self.expand(value, cachename)

  File "/var/build/poky/bitbake/lib/bb/data_smart.py", line 436, in DataSmart.expand(s='${@bb.fetch2.get_srcrev(d)}', varname='SRCPV'):
         def expand(self, s, varname = None):
    >        return self.expandWithRefs(s, varname).value

  File "/var/build/poky/bitbake/lib/bb/data_smart.py", line 426, in DataSmart.expandWithRefs(s='${@bb.fetch2.get_srcrev(d)}', varname='SRCPV'):
                 except Exception as exc:
    >                raise ExpansionError(varname, s, exc) from exc

bb.data_smart.ExpansionError: Failure expanding variable SRCPV, expression was ${@bb.fetch2.get_srcrev(d)} which triggered exception NoMethodError: Could not find a fetcher which supports the URL: 'crate://crates.io/aho-corasick/0.5.3'