[bitbake-devel] [PATCH 3/3] lib/bb/utils: fix and extend edit_metadata_file()
Paul Eggleton
paul.eggleton at linux.intel.com
Mon May 18 15:08:36 UTC 2015
Fix several bugs and add some useful enhancements to make this into a
more generic metadata editing function:
* Support modifying function values (name must be specified ending with
"()")
* Support dropping values by returning None as the new value
* Split out edit_metadata() function to provide same functionality
on a list/iterable
* Pass operation to callback and allow function to return them
* Pass current output lines to callback so they can be modified
* Fix handling of single-quoted values
* Handle :=, =+, .=, and =. operators
* Support arbitrary indent string
* Support indenting by length of assignment (by specifying -1)
* Fix typo in variablename - intentspc -> indentspc
* Expand function docstring to cover arguments / usage
* Add a parameter to enable matching names with overrides applied
* Add some bitbake-selftest tests
Note that this does change the expected signature of the callback
function. The only known caller is in lib/bb/utils.py itself; I doubt
anyone else has made extensive use of this function yet.
Signed-off-by: Paul Eggleton <paul.eggleton at linux.intel.com>
---
lib/bb/tests/utils.py | 271 ++++++++++++++++++++++++++++++++++++++++++++++++++
lib/bb/utils.py | 238 +++++++++++++++++++++++++++++++++-----------
2 files changed, 451 insertions(+), 58 deletions(-)
diff --git a/lib/bb/tests/utils.py b/lib/bb/tests/utils.py
index 6e09858..9171509 100644
--- a/lib/bb/tests/utils.py
+++ b/lib/bb/tests/utils.py
@@ -22,6 +22,7 @@
import unittest
import bb
import os
+import tempfile
class VerCmpString(unittest.TestCase):
@@ -105,3 +106,273 @@ class Path(unittest.TestCase):
for arg1, correctresult in checkitems:
result = bb.utils._check_unsafe_delete_path(arg1)
self.assertEqual(result, correctresult, '_check_unsafe_delete_path("%s") != %s' % (arg1, correctresult))
+
+
+class EditMetadataFile(unittest.TestCase):
+ _origfile = """
+# A comment
+HELLO = "oldvalue"
+
+THIS = "that"
+
+# Another comment
+NOCHANGE = "samevalue"
+OTHER = 'anothervalue'
+
+MULTILINE = "a1 \\
+ a2 \\
+ a3"
+
+MULTILINE2 := " \\
+ b1 \\
+ b2 \\
+ b3 \\
+ "
+
+
+MULTILINE3 = " \\
+ c1 \\
+ c2 \\
+ c3 \\
+"
+
+do_functionname() {
+ command1 ${VAL1} ${VAL2}
+ command2 ${VAL3} ${VAL4}
+}
+"""
+ def _testeditfile(self, varvalues, compareto, dummyvars=None):
+ if dummyvars is None:
+ dummyvars = []
+ with tempfile.NamedTemporaryFile('w', delete=False) as tf:
+ tf.write(self._origfile)
+ tf.close()
+ try:
+ varcalls = []
+ def handle_file(varname, origvalue, op, newlines):
+ self.assertIn(varname, varvalues, 'Callback called for variable %s not in the list!' % varname)
+ self.assertNotIn(varname, dummyvars, 'Callback called for variable %s in dummy list!' % varname)
+ varcalls.append(varname)
+ return varvalues[varname]
+
+ bb.utils.edit_metadata_file(tf.name, varvalues.keys(), handle_file)
+ with open(tf.name) as f:
+ modfile = f.readlines()
+ # Ensure the output matches the expected output
+ self.assertEqual(compareto.splitlines(True), modfile)
+ # Ensure the callback function was called for every variable we asked for
+ # (plus allow testing behaviour when a requested variable is not present)
+ self.assertEqual(sorted(varvalues.keys()), sorted(varcalls + dummyvars))
+ finally:
+ os.remove(tf.name)
+
+
+ def test_edit_metadata_file_nochange(self):
+ # Test file doesn't get modified with nothing to do
+ self._testeditfile({}, self._origfile)
+ # Test file doesn't get modified with only dummy variables
+ self._testeditfile({'DUMMY1': ('should_not_set', None, 0, True),
+ 'DUMMY2': ('should_not_set_again', None, 0, True)}, self._origfile, dummyvars=['DUMMY1', 'DUMMY2'])
+ # Test file doesn't get modified with some the same values
+ self._testeditfile({'THIS': ('that', None, 0, True),
+ 'OTHER': ('anothervalue', None, 0, True),
+ 'MULTILINE3': (' c1 c2 c3', None, 4, False)}, self._origfile)
+
+ def test_edit_metadata_file_1(self):
+
+ newfile1 = """
+# A comment
+HELLO = "newvalue"
+
+THIS = "that"
+
+# Another comment
+NOCHANGE = "samevalue"
+OTHER = 'anothervalue'
+
+MULTILINE = "a1 \\
+ a2 \\
+ a3"
+
+MULTILINE2 := " \\
+ b1 \\
+ b2 \\
+ b3 \\
+ "
+
+
+MULTILINE3 = " \\
+ c1 \\
+ c2 \\
+ c3 \\
+"
+
+do_functionname() {
+ command1 ${VAL1} ${VAL2}
+ command2 ${VAL3} ${VAL4}
+}
+"""
+ self._testeditfile({'HELLO': ('newvalue', None, 4, True)}, newfile1)
+
+
+ def test_edit_metadata_file_2(self):
+
+ newfile2 = """
+# A comment
+HELLO = "oldvalue"
+
+THIS = "that"
+
+# Another comment
+NOCHANGE = "samevalue"
+OTHER = 'anothervalue'
+
+MULTILINE = " \\
+ d1 \\
+ d2 \\
+ d3 \\
+ "
+
+MULTILINE2 := " \\
+ b1 \\
+ b2 \\
+ b3 \\
+ "
+
+
+MULTILINE3 = "nowsingle"
+
+do_functionname() {
+ command1 ${VAL1} ${VAL2}
+ command2 ${VAL3} ${VAL4}
+}
+"""
+ self._testeditfile({'MULTILINE': (['d1','d2','d3'], None, 4, False),
+ 'MULTILINE3': ('nowsingle', None, 4, True),
+ 'NOTPRESENT': (['a', 'b'], None, 4, False)}, newfile2, dummyvars=['NOTPRESENT'])
+
+
+ def test_edit_metadata_file_3(self):
+
+ newfile3 = """
+# A comment
+HELLO = "oldvalue"
+
+# Another comment
+NOCHANGE = "samevalue"
+OTHER = "yetanothervalue"
+
+MULTILINE = "e1 \\
+ e2 \\
+ e3 \\
+ "
+
+MULTILINE2 := "f1 \\
+\tf2 \\
+\t"
+
+
+MULTILINE3 = " \\
+ c1 \\
+ c2 \\
+ c3 \\
+"
+
+do_functionname() {
+ othercommand_one a b c
+ othercommand_two d e f
+}
+"""
+
+ self._testeditfile({'do_functionname()': (['othercommand_one a b c', 'othercommand_two d e f'], None, 4, False),
+ 'MULTILINE2': (['f1', 'f2'], None, '\t', True),
+ 'MULTILINE': (['e1', 'e2', 'e3'], None, -1, True),
+ 'THIS': (None, None, 0, False),
+ 'OTHER': ('yetanothervalue', None, 0, True)}, newfile3)
+
+
+ def test_edit_metadata_file_4(self):
+
+ newfile4 = """
+# A comment
+HELLO = "oldvalue"
+
+THIS = "that"
+
+# Another comment
+OTHER = 'anothervalue'
+
+MULTILINE = "a1 \\
+ a2 \\
+ a3"
+
+MULTILINE2 := " \\
+ b1 \\
+ b2 \\
+ b3 \\
+ "
+
+
+"""
+
+ self._testeditfile({'NOCHANGE': (None, None, 0, False),
+ 'MULTILINE3': (None, None, 0, False),
+ 'THIS': ('that', None, 0, False),
+ 'do_functionname()': (None, None, 0, False)}, newfile4)
+
+
+ def test_edit_metadata(self):
+ newfile5 = """
+# A comment
+HELLO = "hithere"
+
+# A new comment
+THIS += "that"
+
+# Another comment
+NOCHANGE = "samevalue"
+OTHER = 'anothervalue'
+
+MULTILINE = "a1 \\
+ a2 \\
+ a3"
+
+MULTILINE2 := " \\
+ b1 \\
+ b2 \\
+ b3 \\
+ "
+
+
+MULTILINE3 = " \\
+ c1 \\
+ c2 \\
+ c3 \\
+"
+
+NEWVAR = "value"
+
+do_functionname() {
+ command1 ${VAL1} ${VAL2}
+ command2 ${VAL3} ${VAL4}
+}
+"""
+
+
+ def handle_var(varname, origvalue, op, newlines):
+ if varname == 'THIS':
+ newlines.append('# A new comment\n')
+ elif varname == 'do_functionname()':
+ newlines.append('NEWVAR = "value"\n')
+ newlines.append('\n')
+ valueitem = varvalues.get(varname, None)
+ if valueitem:
+ return valueitem
+ else:
+ return (origvalue, op, 0, True)
+
+ varvalues = {'HELLO': ('hithere', None, 0, True), 'THIS': ('that', '+=', 0, True)}
+ varlist = ['HELLO', 'THIS', 'do_functionname()']
+ (updated, newlines) = bb.utils.edit_metadata(self._origfile.splitlines(True), varlist, handle_var)
+ self.assertTrue(updated, 'List should be updated but isn\'t')
+ self.assertEqual(newlines, newfile5.splitlines(True))
diff --git a/lib/bb/utils.py b/lib/bb/utils.py
index 0db7e56..988b845 100644
--- a/lib/bb/utils.py
+++ b/lib/bb/utils.py
@@ -963,14 +963,62 @@ def exec_flat_python_func(func, *args, **kwargs):
bb.utils.better_exec(comp, context, code, '<string>')
return context['retval']
-def edit_metadata_file(meta_file, variables, func):
- """Edit a recipe or config file and modify one or more specified
- variable values set in the file using a specified callback function.
- The file is only written to if the value(s) actually change.
+def edit_metadata(meta_lines, variables, varfunc, match_overrides=False):
+ """Edit lines from a recipe or config file and modify one or more
+ specified variable values set in the file using a specified callback
+ function. Lines are expected to have trailing newlines.
+ Parameters:
+ meta_lines: lines from the file; can be a list or an iterable
+ (e.g. file pointer)
+ variables: a list of variable names to look for. Functions
+ may also be specified, but must be specified with '()' at
+ the end of the name. Note that the function doesn't have
+ any intrinsic understanding of _append, _prepend, _remove,
+ or overrides, so these are considered as part of the name.
+ These values go into a regular expression, so regular
+ expression syntax is allowed.
+ varfunc: callback function called for every variable matching
+ one of the entries in the variables parameter. The function
+ should take four arguments:
+ varname: name of variable matched
+ origvalue: current value in file
+ op: the operator (e.g. '+=')
+ newlines: list of lines up to this point. You can use
+ this to prepend lines before this variable setting
+ if you wish.
+ and should return a three-element tuple:
+ newvalue: new value to substitute in, or None to drop
+ the variable setting entirely. (If the removal
+ results in two consecutive blank lines, one of the
+ blank lines will also be dropped).
+ newop: the operator to use - if you specify None here,
+ the original operation will be used.
+ indent: number of spaces to indent multi-line entries,
+ or -1 to indent up to the level of the assignment
+ and opening quote, or a string to use as the indent.
+ minbreak: True to allow the first element of a
+ multi-line value to continue on the same line as
+ the assignment, False to indent before the first
+ element.
+ match_overrides: True to match items with _overrides on the end,
+ False otherwise
+ Returns a tuple:
+ updated:
+ True if changes were made, False otherwise.
+ newlines:
+ Lines after processing
"""
+
var_res = {}
+ if match_overrides:
+ override_re = '(_[a-zA-Z0-9-_$(){}]+)?'
+ else:
+ override_re = ''
for var in variables:
- var_res[var] = re.compile(r'^%s[ \t]*[?+]*=' % var)
+ if var.endswith('()'):
+ var_res[var] = re.compile('^(%s%s)[ \\t]*\([ \\t]*\)[ \\t]*{' % (var[:-2].rstrip(), override_re))
+ else:
+ var_res[var] = re.compile('^(%s%s)[ \\t]*[?+:.]*=[+.]*[ \\t]*(["\'])' % (var, override_re))
updated = False
varset_start = ''
@@ -978,70 +1026,144 @@ def edit_metadata_file(meta_file, variables, func):
newlines = []
in_var = None
full_value = ''
+ var_end = ''
def handle_var_end():
- (newvalue, indent, minbreak) = func(in_var, full_value)
- if newvalue != full_value:
- if isinstance(newvalue, list):
- intentspc = ' ' * indent
- if minbreak:
- # First item on first line
- if len(newvalue) == 1:
- newlines.append('%s "%s"\n' % (varset_start, newvalue[0]))
+ prerun_newlines = newlines[:]
+ op = varset_start[len(in_var):].strip()
+ (newvalue, newop, indent, minbreak) = varfunc(in_var, full_value, op, newlines)
+ changed = (prerun_newlines != newlines)
+
+ if newvalue is None:
+ # Drop the value
+ return True
+ elif newvalue != full_value or (newop not in [None, op]):
+ if newop not in [None, op]:
+ # Callback changed the operator
+ varset_new = "%s %s" % (in_var, newop)
+ else:
+ varset_new = varset_start
+
+ if isinstance(indent, (int, long)):
+ if indent == -1:
+ indentspc = ' ' * (len(varset_new) + 2)
+ else:
+ indentspc = ' ' * indent
+ else:
+ indentspc = indent
+ if in_var.endswith('()'):
+ # A function definition
+ if isinstance(newvalue, list):
+ newlines.append('%s {\n%s%s\n}\n' % (varset_new, indentspc, ('\n%s' % indentspc).join(newvalue)))
+ else:
+ if not newvalue.startswith('\n'):
+ newvalue = '\n' + newvalue
+ if not newvalue.endswith('\n'):
+ newvalue = newvalue + '\n'
+ newlines.append('%s {%s}\n' % (varset_new, newvalue))
+ else:
+ # Normal variable
+ if isinstance(newvalue, list):
+ if not newvalue:
+ # Empty list -> empty string
+ newlines.append('%s ""\n' % varset_new)
+ elif minbreak:
+ # First item on first line
+ if len(newvalue) == 1:
+ newlines.append('%s "%s"\n' % (varset_new, newvalue[0]))
+ else:
+ newlines.append('%s "%s \\\n' % (varset_new, newvalue[0]))
+ for item in newvalue[1:]:
+ newlines.append('%s%s \\\n' % (indentspc, item))
+ newlines.append('%s"\n' % indentspc)
else:
- newlines.append('%s "%s\\\n' % (varset_start, newvalue[0]))
- for item in newvalue[1:]:
- newlines.append('%s%s \\\n' % (intentspc, item))
+ # No item on first line
+ newlines.append('%s " \\\n' % varset_new)
+ for item in newvalue:
+ newlines.append('%s%s \\\n' % (indentspc, item))
newlines.append('%s"\n' % indentspc)
else:
- # No item on first line
- newlines.append('%s " \\\n' % varset_start)
- for item in newvalue:
- newlines.append('%s%s \\\n' % (intentspc, item))
- newlines.append('%s"\n' % intentspc)
- else:
- newlines.append('%s "%s"\n' % (varset_start, newvalue))
+ newlines.append('%s "%s"\n' % (varset_new, newvalue))
return True
else:
# Put the old lines back where they were
newlines.extend(varlines)
- return False
+ # If newlines was touched by the function, we'll need to return True
+ return changed
- with open(meta_file, 'r') as f:
- for line in f:
- if in_var:
- value = line.rstrip()
- varlines.append(line)
- full_value += value[:-1]
- if value.endswith('"') or value.endswith("'"):
- full_value = full_value[:-1]
- if handle_var_end():
- updated = True
- in_var = None
+ checkspc = False
+
+ for line in meta_lines:
+ if in_var:
+ value = line.rstrip()
+ varlines.append(line)
+ if in_var.endswith('()'):
+ full_value += '\n' + value
else:
- matched = False
- for (varname, var_re) in var_res.iteritems():
- if var_re.match(line):
- splitvalue = line.split('"', 1)
- varset_start = splitvalue[0].rstrip()
- value = splitvalue[1].rstrip()
- if value.endswith('\\'):
- value = value[:-1]
- full_value = value
- varlines = [line]
- in_var = varname
- if value.endswith('"') or value.endswith("'"):
- full_value = full_value[:-1]
- if handle_var_end():
- updated = True
- in_var = None
- matched = True
- break
- if not matched:
- newlines.append(line)
+ full_value += value[:-1]
+ if value.endswith(var_end):
+ if in_var.endswith('()'):
+ if full_value.count('{') - full_value.count('}') >= 0:
+ continue
+ full_value = full_value[:-1]
+ if handle_var_end():
+ updated = True
+ checkspc = True
+ in_var = None
+ else:
+ skip = False
+ for (varname, var_re) in var_res.iteritems():
+ res = var_re.match(line)
+ if res:
+ isfunc = varname.endswith('()')
+ if isfunc:
+ splitvalue = line.split('{', 1)
+ var_end = '}'
+ else:
+ var_end = res.groups()[-1]
+ splitvalue = line.split(var_end, 1)
+ varset_start = splitvalue[0].rstrip()
+ value = splitvalue[1].rstrip()
+ if not isfunc and value.endswith('\\'):
+ value = value[:-1]
+ full_value = value
+ varlines = [line]
+ in_var = res.group(1)
+ if isfunc:
+ in_var += '()'
+ if value.endswith(var_end):
+ full_value = full_value[:-1]
+ if handle_var_end():
+ updated = True
+ checkspc = True
+ in_var = None
+ skip = True
+ break
+ if not skip:
+ if checkspc:
+ checkspc = False
+ if newlines[-1] == '\n' and line == '\n':
+ # Squash blank line if there are two consecutive blanks after a removal
+ continue
+ newlines.append(line)
+ return (updated, newlines)
+
+
+def edit_metadata_file(meta_file, variables, varfunc):
+ """Edit a recipe or config file and modify one or more specified
+ variable values set in the file using a specified callback function.
+ The file is only written to if the value(s) actually change.
+ This is basically the file version of edit_metadata(), see that
+ function's description for parameter/usage information.
+ Returns True if the file was written to, False otherwise.
+ """
+ with open(meta_file, 'r') as f:
+ (updated, newlines) = edit_metadata(f, variables, varfunc)
if updated:
with open(meta_file, 'w') as f:
f.writelines(newlines)
+ return updated
+
def edit_bblayers_conf(bblayers_conf, add, remove):
"""Edit bblayers.conf, adding and/or removing layers"""
@@ -1070,7 +1192,7 @@ def edit_bblayers_conf(bblayers_conf, add, remove):
# Need to use a list here because we can't set non-local variables from a callback in python 2.x
bblayercalls = []
- def handle_bblayers(varname, origvalue):
+ def handle_bblayers(varname, origvalue, op, newlines):
bblayercalls.append(varname)
updated = False
bblayers = [remove_trailing_sep(x) for x in origvalue.split()]
@@ -1094,9 +1216,9 @@ def edit_bblayers_conf(bblayers_conf, add, remove):
notadded.append(addlayer)
if updated:
- return (bblayers, 2, False)
+ return (bblayers, None, 2, False)
else:
- return (origvalue, 2, False)
+ return (origvalue, None, 2, False)
edit_metadata_file(bblayers_conf, ['BBLAYERS'], handle_bblayers)
--
2.1.0
More information about the bitbake-devel
mailing list