bitbake/data.py: corrected the output for shell syntax.

[BUGID# 645], modify the emit_var()
1. Added "#" to the beginning of each line if the comment contains
multiple lines.

2. Added "\" to the end of each line if the shell variable value
contains multiple lines.

Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/bitbake/lib/bb/data.py b/bitbake/lib/bb/data.py
index 6ec522aa48..53ce7d62d3 100644
--- a/bitbake/lib/bb/data.py
+++ b/bitbake/lib/bb/data.py
@@ -192,7 +192,8 @@ def emit_var(var, o=sys.__stdout__, d = init(), all=False):
         return 0
 
     if all:
-        o.write('# %s=%s\n' % (var, oval))
+        commentVal = re.sub('\n', '\n#', str(oval))
+        o.write('# %s=%s\n' % (var, commentVal))
 
     if (var.find("-") != -1 or var.find(".") != -1 or var.find('{') != -1 or var.find('}') != -1 or var.find('+') != -1) and not all:
         return 0
@@ -219,6 +220,7 @@ def emit_var(var, o=sys.__stdout__, d = init(), all=False):
     # if we're going to output this within doublequotes,
     # to a shell, we need to escape the quotes in the var
     alter = re.sub('"', '\\"', val.strip())
+    alter = re.sub('\n', ' \\\n', alter)
     o.write('%s="%s"\n' % (varExpanded, alter))
     return 0