fetch2: preserve current working directory

Fix the methods in all fetchers so they don't change
the current working directory of the calling process, which
could lead to "changed cwd" warnings from bitbake.

Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 15 deletions

diff --git a/lib/bb/fetch2/npm.py b/lib/bb/fetch2/npm.py
index 2fd43034b..b26ac22ef 100644
--- a/lib/bb/fetch2/npm.py
+++ b/lib/bb/fetch2/npm.py
@@ -113,16 +113,13 @@ class Npm(FetchMethod):
             bb.fatal("NPM package %s downloaded not a tarball!" % file)
 
         # Change to subdir before executing command
-        save_cwd = os.getcwd()
         if not os.path.exists(destdir):
             os.makedirs(destdir)
-        os.chdir(destdir)
         path = d.getVar('PATH', True)
         if path:
             cmd = "PATH=\"%s\" %s" % (path, cmd)
-        bb.note("Unpacking %s to %s/" % (file, os.getcwd()))
-        ret = subprocess.call(cmd, preexec_fn=subprocess_setup, shell=True)
-        os.chdir(save_cwd)
+        bb.note("Unpacking %s to %s/" % (file, destdir))
+        ret = subprocess.call(cmd, preexec_fn=subprocess_setup, shell=True, cwd=destdir)
 
         if ret != 0:
             raise UnpackError("Unpack command %s failed with return value %s" % (cmd, ret), ud.url)
@@ -239,10 +236,7 @@ class Npm(FetchMethod):
         if not os.listdir(ud.pkgdatadir) and os.path.exists(ud.fullmirror):
             dest = d.getVar("DL_DIR", True)
             bb.utils.mkdirhier(dest)
-            save_cwd = os.getcwd()
-            os.chdir(dest)
-            runfetchcmd("tar -xJf %s" % (ud.fullmirror), d)
-            os.chdir(save_cwd)
+            runfetchcmd("tar -xJf %s" % (ud.fullmirror), d, workdir=dest)
             return
 
         shwrf = d.getVar('NPM_SHRINKWRAP', True)
@@ -275,10 +269,8 @@ class Npm(FetchMethod):
             if os.path.islink(ud.fullmirror):
                 os.unlink(ud.fullmirror)
 
-            save_cwd = os.getcwd()
-            os.chdir(d.getVar("DL_DIR", True))
+            dldir = d.getVar("DL_DIR", True)
             logger.info("Creating tarball of npm data")
-            runfetchcmd("tar -cJf %s npm/%s npm/%s" % (ud.fullmirror, ud.bbnpmmanifest, ud.pkgname), d)
-            runfetchcmd("touch %s.done" % (ud.fullmirror), d)
-            os.chdir(save_cwd)
-
+            runfetchcmd("tar -cJf %s npm/%s npm/%s" % (ud.fullmirror, ud.bbnpmmanifest, ud.pkgname), d,
+                        workdir=dldir)
+            runfetchcmd("touch %s.done" % (ud.fullmirror), d, workdir=dldir)