[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7647/8267] go.bbclass: add do_unpack function to handle common cases

[Emmanuele Bassi <ebassi src gnome org>]

commit 7149219b7630cb8cfb70caf4610d4b64a4eccff3
Author: Matt Madison <matt@madison.systems>
Date:   Fri Sep 8 18:04:41 2017 -0300

    go.bbclass: add do_unpack function to handle common cases
    
    Go source trees have a particular structure, with all
    sources located under ${GOROOT}/src/<import-path>.
    The fetcher step implemented by the 'go get' command
    automatically follows this structure, so we need
    to do the same here.
    
    Since most Go packages are hosted in git repositories,
    this adds a custom do_unpack() function that sets
    the destsuffix to match the expected directory structure,
    for any git SRC_URIs that haven't had a destsuffix
    explicitly set in the recipe.
    
    This simplifies recipe writing for the most common
    cases.
    
    (From OE-Core rev: efcf6513b71021ea4bfe6fbaa326e6591dee487d)
    
    Signed-off-by: Matt Madison <matt@madison.systems>
    Signed-off-by: Otavio Salvador <otavio ossystems com br>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/go.bbclass |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)
---
diff --git a/meta/classes/go.bbclass b/meta/classes/go.bbclass
index cfe773e..c1ef01f 100644
--- a/meta/classes/go.bbclass
+++ b/meta/classes/go.bbclass
@@ -55,6 +55,24 @@ GO_INSTALL ?= "${GO_IMPORT}/..."
 
 B = "${WORKDIR}/build"
 
+python go_do_unpack() {
+    src_uri = (d.getVar('SRC_URI') or "").split()
+    if len(src_uri) == 0:
+        return
+
+    try:
+        fetcher = bb.fetch2.Fetch(src_uri, d)
+        for url in fetcher.urls:
+            if fetcher.ud[url].type == 'git':
+                if fetcher.ud[url].parm.get('destsuffix') is None:
+                    s_dirname = os.path.basename(d.getVar('S'))
+                    fetcher.ud[url].parm['destsuffix'] = os.path.join(s_dirname, 'src',
+                                                                      d.getVar('GO_IMPORT')) + '/'
+        fetcher.unpack(d.getVar('WORKDIR'))
+    except bb.fetch2.BBFetchException as e:
+        raise bb.build.FuncFailed(e)
+}
+
 go_do_configure() {
        ln -snf ${S}/src ${B}/
 }
@@ -79,4 +97,4 @@ go_do_install() {
        fi
 }
 
-EXPORT_FUNCTIONS do_configure do_compile do_install
+EXPORT_FUNCTIONS do_unpack do_configure do_compile do_install