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from ply import lex
from ply import yacc
def scanacfile(acfile):
tokens = (
"FUNC",
"FUNCOPT", #func options
"FUNCEND",
"VAR",
"ECHO",
"TEXT",
"IF",
"ELSE",
"THEN",
"IFEND",
"CASE",
"CASEEND",
)
states = (
("func", "exclusive"),
("funcopt", "exclusive"),
)
def t_ANY_contline(t):
r"\\\n"
t.lexer.lineno += 1
pass
def t_ANY_space(t):
r"[ \t]"
pass
def t_ANY_newline(t):
r"\n"
t.lexer.lineno += 1
pass
def t_INITIAL_func_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_func_FUNCOPT(t):
r"[^\\\(\)\[\],]+"
t.lexer.lineno += t.value.count('\n')
return t
def t_func_comma(t):
r"[ \t]*,[ \t]*"
pass
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):
r"[a-zA-Z_][a-zA-Z0-9_]*=([^\\\n]|\\\n)*\n"
return t
def t_IF(t):
r"if"
return t
def t_THEN(t):
r"then"
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"
return t
def t_CASEEND(t):
r"esac"
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):
r"[^ \t\n\(\)]+"
return t
def t_ANY_error(t):
print("Illegal character '%s'" % t.value[0])
t.lexer.skip(1)
lexer = lex.lex()
lexer.input(acfile)
for tok in lexer:
print(tok)
file="configure.in"
with open(file, encoding="utf-8", errors="replace") as inputfile:
scanacfile(inputfile.read())
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