support/download: alternative access methods to CVS

Allows user to specify other access methods than :pserver:anonymous@
on CVS repositories. This shall be defined in the <pkg>_SITE variable.

[Thomas:
 - as suggested by Yann, quote the variable expansion
 - as suggested by Yann, use a regexp match
 - tweak commit log]

Signed-off-by: Joao Mano <joao@datacom.ind.br>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

docs/manual/adding-packages-generic.txt

@@ -279,7 +279,12 @@ information is (assuming the package name is +libfoo+) :
   ** +cvs+ for retrieving source code from a CVS repository.
      Used by default when +LIBFOO_SITE+ begins with +cvs://+.
      The downloaded source code is cached as with the +svn+ method.
-     Only anonymous pserver mode is supported.
+     Anonymous pserver mode is assumed otherwise explicitly defined
+     on +LIBFOO_SITE+. Both
+     +LIBFOO_SITE=cvs://libfoo.net:/cvsroot/libfoo+ and
+     +LIBFOO_SITE=cvs://:ext:libfoo.net:/cvsroot/libfoo+
+     are accepted, on the former anonymous pserver access mode is
+     assumed.
      +LIBFOO_SITE+ 'must' contain the source URL as well as the remote
      repository directory. The module is the package name.
      +LIBFOO_VERSION+ is 'mandatory' and 'must' be a tag, a branch, or

support/download/cvs

@@ -40,8 +40,14 @@ else
     select="-r"
 fi
 
+# The absence of an initial : on ${repo} means access method undefined
+if [[ ! "${repo}" =~ ^: ]]; then
+   # defaults to anonymous pserver
+   repo=":pserver:anonymous@${repo}"
+fi
+
 export TZ=UTC
-_cvs ${verbose} -z3 -d"':pserver:anonymous@${repo}'" \
+_cvs ${verbose} -z3 -d"'${repo}'" \
      co -d "'${basename}'" ${select} "'${rev}'" -P "'${rawname}'"
 
 tar czf "${output}" "${basename}"