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from ply import lex
from ply import yacc
def scanacfile(acfile):
"""Scan a autoconfigure (.in/.ac) file.
Returns ....
"""
tokens = (
"FUNC",
"COMPFUNC", #complete func
"FUNCOPT", #func options
"FUNCEND",
"VAR",
"ECHO",
"TEXT",
"IF",
"IFCOM",
"ELIF",
"ELSE",
"THEN",
"IFEND",
"CASE",
"CASEOPT",
"COPTEND", #case opt end, doesn't need to be there but SHOULD
"CASEEND",
"COMMA",
)
states = (
("func", "inclusive"),
("funcopt", "exclusive"),
("case", "inclusive"),
("if", "inclusive"),
("shellcom", "exclusive"),
)
def t_contline(t):
r"\\\n"
t.lexer.lineno += 1
pass
def t_ANY_space(t):
r"[ \t]"
pass
def t_newline(t):
r"\n"
t.lexer.lineno += 1
pass
def t_shfunc(t): #shell func
r'[a-zA-Z_][a-zA-Z0-9_]*\(\)[ \t]*{'
t.lexer.level = 1
t.lexer.push_state("shellcom")
def t_shellcom_text(t):
r"[^{}]+"
def t_shellcom_opb(t):
r"{"
t.lexer.level +=1
def t_shellcom_opc(t):
r"}"
t.lexer.level -=1
if t.lexer.level == 0:
t.lexer.pop_state()
pass
def t_COMPFUNC(t):
r'[a-zA-Z_][a-zA-Z0-9_]*\([^\\[\](\),]*\)'
values = t.value.split("(")
t.value = [values[0],values[1][:-1]]
return t
def t_FUNC(t):
r'[a-zA-Z_][a-zA-Z0-9_]*\('
t.lexer.push_state('func')
t.value = t.value[:-1] #return name of func
return t
def t_func_funcopt(t):
r'\['
t.lexer.code_start = t.lexer.lexpos # Record the starting position
t.lexer.level = 1 # Initial level
t.lexer.push_state('funcopt') # Enter 'ccode' state
# Rules for the ccode state
def t_funcopt_newcom(t):
r'\['
t.lexer.level +=1
def t_funcopt_endcom(t):
r'\]'
t.lexer.level -=1
# If closing command, return the code fragment
if t.lexer.level == 0:
t.value = t.lexer.lexdata[t.lexer.code_start-1:t.lexer.lexpos]
t.type = "FUNCOPT"
t.lexer.lineno += t.value.count('\n')
t.lexer.pop_state()
return t
def t_funcopt_opt(t):
r"[^\\\[\]]+"
def t_funcopt_contline(t):
r"\\\n"
def t_func_COMMA(t):
r","
return t
def t_func_FUNCEND(t):
r"\)"
t.lexer.pop_state()
return t
def t_comment(t):
r"(dnl|\#).*\n"
t.lexer.lineno += t.value.count('\n')
pass
def t_ECHO(t):
r"echo.*\n"
t.lexer.lineno += t.value.count('\n')
return t
def t_VAR(t):
#take var=text, var="text text", var='text text', var=`text text`
r"[a-zA-Z_][a-zA-Z0-9_]*=(\"[^\"]*\"|\'[^\']*\'|\`[^\`]*\`|[^() \t,\n]*)+"
t.lexer.lineno += t.value.count('\n')
return t
def t_IF(t):
r"if"
t.lexer.push_state("if")
return t
def t_ELIF(t):
r"elif"
t.lexer.push_state("if")
return t
def t_if_THEN(t):
r"then"
t.lexer.pop_state()
return t
def t_if_IFCOM(t):
r"[^ \t\n]+"
return t
def t_ELSE(t):
r"else"
return t
def t_IFEND(t):
r"fi"
return t
def t_CASE(t):
r"case.*in"
t.lexer.push_state("case")
return t
def t_CASEEND(t):
r"esac"
t.lexer.pop_state()
return t
def t_case_CASEOPT(t):
r"[^\n\t\(\)]+\)"
return t
def t_case_COPTEND(t):
r";;"
return t
def t_literal(t):
r"\\[^\n]"
t.type = "TEXT"
t.value = t.value[-1] #return litral char
return t
def t_TEXT(t): #most likely commands like "AM_INIT_AUTOMAKE" etc.
#Fix this so I can handle variables like the one above as that is NOT a text string
r"([^ ;,\t\n\(\)]+|\([^() \t\n]*\))"
return t
def t_ANY_error(t):
print("Illegal character '%s'" % t.value[0],t.lexer.lineno)
t.lexer.skip(1)
lexer = lex.lex()
#lexer.input(acfile)
#for tok in lexer:
# print(tok)
#YACC stuff begins here
def p_complst(p):
"""
complst : complst text
| complst ECHO
| complst func
| complst VAR
| complst ifcomp
| complst case
| complst FUNCOPT
| text
| ECHO
| func
| VAR
| ifcomp
| case
| FUNCOPT
"""
if len(p) == 3:
p[0] = p[1] + [p[2]]
else:
p[0] = [p[1]]
def p_text(p):
"""
text : text TEXT
| TEXT
"""
if len(p) == 3:
p[0] = p[1] + " " + p[2]
else:
p[0] = p[1]
def p_case(p):
"""
case : CASE caseopt CASEEND
"""
p[0] = [p[1]] + [p[2]]
def p_caseopt(p):
"""
caseopt : caseopt CASEOPT complst COPTEND
| CASEOPT complst COPTEND
"""
if len(p) == 5:
p[0] = p[1] + [p[2], p[3]]
else:
p[0] = [p[1], p[2]]
def p_caseopt2(p):
"""
caseopt : caseopt CASEOPT complst
| caseopt CASEOPT COPTEND
| CASEOPT complst
| CASEOPT COPTEND
"""
if len(p) == 4:
if isinstance(p[3],list):
p[0] = p[1] + [p[2], p[3]]
else:
p[0] = p[1] + [p[2], []]
else:
if isinstance(p[2],list):
p[0] = [p[1], p[2]]
else:
p[0] = [p[1], []]
def p_ifcomp(p): #perhaps needs elif also
"""
ifcomp : if IFEND
"""
p[0] = p[1]
def p_if(p):
"""
if : if ELSE complst
| IF ifcom THEN complst
| if ELIF ifcom THEN complst
"""
if len(p) == 5:
p[0] = [[p[1]] + [p[2]], p[4]]
elif len(p) == 6:
p[0] = p[1] + [[p[2]] + [p[3]], p[5]]
else:
p[0] = p[1] + [[p[2]], p[3]]
def p_ifcom(p):
"""
ifcom : ifcom IFCOM
| IFCOM
"""
if len(p) == 3:
p[0] = p[1] + [p[2]]
else:
p[0] = [p[1]]
def p_func(p):
"""
func : FUNC funcopt FUNCEND
| COMPFUNC
"""
if len(p) == 2:
p[0] = p[1] #this is already ordered
else:
p[0] = [p[1],p[2]]
def p_funccomma(p):
"""
funcopt : funcopt COMMA
| COMMA complst
| COMMA
"""
if len(p) == 3:
if isinstance(p[2],list):
if len(p[2]) > 1:
p[0] = [[]] + [p[2]]
else:
p[0] = [[]] + p[2]
else:
p[0] = p[1] + [[]]
else:
p[0] = [[]]
def p_funcopt(p):
"""
funcopt : funcopt COMMA complst
| complst
"""
if len(p) == 4:
if len(p[3]) > 1:
p[0] = p[1] + [p[3]]
else:
p[0] = p[1] + p[3]
else:
if len(p[1]) > 1:
p[0] = [p[1]]
else:
p[0] = p[1]
def p_error(p):
print("syntax error at '%s'" % p.type,p.value)
pass
yacc.yacc()
items = yacc.parse(acfile)
return items
from filetypes.acif import parseif
def output(inputlst):
variables = dict()
iflst = []
for item in inputlst:
if item[0] == "AC_ARG_ENABLE":
name = convnames(item[1][0])
if len(item[1]) == 2:
variables["enable_" + name] = {"AC_ARG_ENABLE" : ""}
elif len(item[1]) == 3:
variables["enable_" + name] = [item[1][2],[]]
else:
variables["enable_" + name] = [item[1][2],item[1][3]]
#remember to convert chars in the name of "item[1]" that is not
#alfanumeric char to underscores _
#Done with convnames!
elif item[0] == "AC_ARG_WITH":
name = convnames(item[1][0])
if len(item[1]) == 2:
variables["with_" + name] = {"AC_ARG_WITH" : ""}
elif len(item[1]) == 3:
variables["with_" + name] = [item[1][2],[]]
else:
variables["with_" + name] = [item[1][2],item[1][3]]
elif isinstance(item[0],list): #if statements
for variable in variables:
for pattern in item[0][1]:
if variable in pattern:
iflst += [[parseif(item[0][1]),ifs(item[1],{})]]
elif item[0] == "AM_CONDITIONAL":
var = item[1][0].strip("[]")
cond = parseif(item[1][1].strip("[]").split())
for if_state in iflst:
if cond[0] in if_state[1]:
if cond[1] == "!" or cond[1] == if_state[1][cond[0]]:
#"!" == not zero/defined, "" zero/not defined
if_state[1][var] = "true"
#for variable in variables:
#print(variable)
#print(variables[variable])
#print(iflst)
return variables,iflst
def ifs(inputlst,variables):
for item in inputlst:
ac_check = 0 #is this an ac_check?
if item[0] == "AC_CHECK_HEADERS":
ac_check = 1
elif item[0] == "AC_CHECK_LIB":
ac_check = 2
elif item[0] == "PKG_CHECK_MODULES":
ac_check = 3
if ac_check:
if not isinstance(item[1][0],list):
headers = convnames(item[1][0]).split()
else:
headers = []
for header in item[1][0]:
headers += convnames(header)
for header in headers:
if ac_check == 1:
variables["ac_cv_header_" + header] = "yes"
if ac_check == 2:
variables["ac_cv_lib_" + header] = "yes"
if len(item[1]) > 2:
if isinstance(item[1][2],list):
variables.update(ifs(item[1][2], variables))
else:
variables.update(ifs(scanacfile(item[1][2].strip("[]")), variables))
elif isinstance(item[0],list): #if statement
variables.update(ifs(item[1],variables))
elif item[0] == "AC_DEFINE":
if len(item[1]) == 1:
variables.update({item[1][0].strip("[]") : "1"})
else:
variables.update({item[1][0].strip("[]") : item[1][1]})
elif "=" in item:
(var,items) = item.split("=")
compitems = []
#Fix "´" aka exec shell commad comments!
for itm in items.strip('"').strip("'").split():
if itm[0] == "$":
if itm[1:] in variables:
compitems += variables[itm[1:]]
else:
compitems += [itm]
variables[var] = compitems
return variables
import re
def convnames(string): #strip none alfanumeric chars and replace them with "_"
string = string.strip("[]") #remove quotes
pattern = re.compile("\W")
newstr = re.sub(pattern, "_", string)
return newstr
#this is no a good name, come up with a better one!
def scanac(acfile):
return output(scanacfile(acfile))
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