[OE-core] [PATCH 5/6] qemuboot: Improve relative path handling

[Richard Purdie]

qemuconf files are currently written relative to TOPDIR. What
makes more sense is to write paths relative to the location of the
file. This makes moving them around and decoding the end paths in
runqemu much easier.

The effect of this should allow less use of bitbake to determine
variables and allow us to simplify runqemu.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/classes/qemuboot.bbclass | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/meta/classes/qemuboot.bbclass b/meta/classes/qemuboot.bbclass
index 7243cc5..15a9e63 100644
--- a/meta/classes/qemuboot.bbclass
+++ b/meta/classes/qemuboot.bbclass
@@ -85,7 +85,8 @@ python do_write_qemuboot_conf() {
 
     qemuboot = "%s/%s.qemuboot.conf" % (d.getVar('IMGDEPLOYDIR'), d.getVar('IMAGE_NAME'))
     qemuboot_link = "%s/%s.qemuboot.conf" % (d.getVar('IMGDEPLOYDIR'), d.getVar('IMAGE_LINK_NAME'))
-    topdir="%s/"%(d.getVar('TOPDIR')).replace("//","/")
+    finalpath = d.getVar("DEPLOY_DIR_IMAGE")
+    topdir = d.getVar('TOPDIR')
     cf = configparser.ConfigParser()
     cf.add_section('config_bsp')
     for k in sorted(qemuboot_vars(d)):
@@ -98,7 +99,8 @@ python do_write_qemuboot_conf() {
             val = d.getVar(k)
         # we only want to write out relative paths so that we can relocate images
         # and still run them
-        val=val.replace(topdir,"")
+        if val.startswith(topdir):
+            val = os.path.relpath(val, finalpath)
         cf.set('config_bsp', k, '%s' % val)
 
     # QB_DEFAULT_KERNEL's value of KERNEL_IMAGETYPE is the name of a symlink
@@ -108,7 +110,7 @@ python do_write_qemuboot_conf() {
     kernel = os.path.realpath(kernel_link)
     # we only want to write out relative paths so that we can relocate images
     # and still run them
-    kernel=kernel.replace(topdir,"")
+    kernel = os.path.relpath(kernel, finalpath)
     cf.set('config_bsp', 'QB_DEFAULT_KERNEL', kernel)
 
     bb.utils.mkdirhier(os.path.dirname(qemuboot))
-- 
2.7.4