Ejercicio 11

exercises/ex04/help

@@ -1,4 +1,6 @@
+#!/usr/bin/env python
 # Exercise 4
+# help arg 
 # 1. Getting help with -help or -h.
 # 2. A least three arguments that are flags, meaning they don’t take an extra
 #    argument but simply putting them on the command line turns something on.

exercises/ex05/cat

@@ -1,5 +1,6 @@
+#!/usr/bin/env python
 # Exercise 5
-# 1. cat command
+# cat command
 
 import argparse
 from pathlib import Path

exercises/ex06/find

@@ -1,5 +1,6 @@
+#!/usr/bin/env python
 # Exercise 6
-# 1. find command
+# find command
 
 import sys
 import argparse

exercises/ex07/grep

@@ -1,5 +1,6 @@
+#!/usr/bin/env python
 # Exercise 7
-# 1. grep command
+# grep command
 
 import re
 import sys

exercises/ex08/cut

@@ -1,5 +1,6 @@
+#!/usr/bin/env python
 # Exercise 8
-# 1. cut command
+# cut command
 
 import re
 import sys

exercises/ex09/sed

@@ -1,5 +1,6 @@
+#!/usr/bin/env python
 # Exercise 9
-# 1. sed command
+# sed command
 
 import re
 import sys
@@ -7,34 +8,20 @@ import argparse
 from pathlib import Path
 
 
-def check(expression, exp):
-    error = False
-    if (
-        expression[-1] not in "/g"
-        or exp[0] not in "s"
-        or len(exp) not in range(3, 5)
-        or (expression[-1] in "g" and len(exp) != 4)
-        or (expression[-1] in "/" and len(exp) == 4)
-    ):
-        error = True
-    if error:
+def parse(expression):
+    try:
+        match = re.fullmatch(r's/(.*)/(.*)/(g{0,1})', expression)
+        count = 0 if match.group(3) == "g" else 1
+        return {
+            "rgx": re.compile(match.group(1)),
+            "rep": match.group(2),
+            "n": count
+        }
+    except Exception:
         print(f"sed: expresión «{expression}» inválida")
         sys.exit(1)
 
 
-def parse(expression):
-    count = 0
-    exp = list(filter(None, expression.split("/")))
-    check(expression, exp)
-    if len(exp) == 3:
-        count = 1
-    return {
-        "rgx": re.compile(exp[1]),
-        "rep": exp[2],
-        "n": count,
-    }
-
-
 parser = argparse.ArgumentParser()
 parser.add_argument("stream", default=sys.stdin, nargs="*")
 parser.add_argument(

exercises/ex10/sort

@@ -1,5 +1,6 @@
+#!/usr/bin/env python
 # Exercise 10
-# 1. sort command
+# sort command
 
 import sys
 import argparse

exercises/ex11/cut

@@ -0,0 +1 @@
+../ex08/cut

exercises/ex11/sed

@@ -0,0 +1 @@
+../ex09/sed

exercises/ex11/sort

@@ -0,0 +1 @@
+../ex10/sort

exercises/ex11/uniq

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# Exercise 11
+# uniq command
+
+import sys
+import argparse
+from pathlib import Path
+
+parser = argparse.ArgumentParser()
+parser.add_argument("stream", default=sys.stdin, nargs="*")
+parser.add_argument("-i", "--ignore-case", action="store_true")
+parser.add_argument("-c", "--count", action="store_true")
+args = parser.parse_args()
+lines = []
+counter = None
+
+for stream in args.stream:
+    if isinstance(args.stream, list):
+        for line in Path(stream).open().readlines():
+            lines.append(line.rstrip())
+    else:
+        lines.append(stream.strip())
+
+if args.ignore_case:
+    lines = list(map(lambda l: l.lower(), lines))
+
+if args.count:
+    counter = {}
+    for line in lines:
+        counter.setdefault(line, 0)
+        counter[line] += 1
+
+lines = sorted(set(lines))
+
+for line in lines:
+    msg = line if counter is None else f"{counter[line]} {line}"
+    print(msg)