Add security and best_practices validators

src/validators/best_practices.py

@@ -1,104 +1,35 @@
-"""Best practices validation module."""
-
+"""Best practices validation."""
 from typing import List, Optional
-
 from ..models import Rule, Finding
 
-
 class BestPracticesValidator:
-    """Validates shell scripts for best practices."""
-
-    def __init__(self, custom_rules: Optional[List[Rule]] = None):
-        """Initialize the best practices validator with optional custom rules."""
-        self.rules = self.DEFAULT_PATTERNS.copy()
-        if custom_rules:
-            self.rules.extend(custom_rules)
-
     DEFAULT_PATTERNS = [
         Rule(
-            id="BEST001",
-            name="Missing set -e",
-            pattern=r"^[^#!]*set\s+-e",
-            severity="medium",
+            id="BEST001", name="Missing set -e",
+            pattern=r"^[^#!]*set\s+-e", severity="medium",
             message="Script missing 'set -e' for automatic error handling",
             suggestion="Add 'set -e' at the beginning of the script to exit on errors",
         ),
         Rule(
-            id="BEST002",
-            name="Missing set -u",
-            pattern=r"set\s+-[aeu]",
-            severity="medium",
+            id="BEST002", name="Missing set -u",
+            pattern=r"set\s+-[aeu]", severity="medium",
             message="Script missing 'set -u' to catch undefined variables",
             suggestion="Add 'set -u' to catch usage of undefined variables",
         ),
         Rule(
-            id="BEST003",
-            name="Missing set -o pipefail",
-            pattern=r"set\s+-o\s+pipefail",
-            severity="medium",
-            message="Script missing 'set -o pipefail' for proper pipeline error handling",
-            suggestion="Add 'set -o pipefail' to capture errors in pipelines",
-        ),
-        Rule(
-            id="BEST004",
-            name="No error handling for command",
-            pattern=r"^(?!.*(\|\||\&\&|;|exit\s+\d+)).*$",
-            severity="medium",
-            message="Command without error handling",
-            suggestion="Add error handling with '|| exit 1' or '&&' operator",
-        ),
-        Rule(
-            id="BEST005",
-            name="Dangerous cp without -i",
-            pattern=r"cp\s+(?!.*-i)(?!.*--interactive)\s+\S+\s+\S+",
-            severity="medium",
-            message="cp without -i can overwrite files without warning",
-            suggestion="Use 'cp -i' for interactive mode or 'cp -n' for no-clobber",
-        ),
-        Rule(
-            id="BEST006",
-            name="Dangerous mv without -i",
-            pattern=r"mv\s+(?!.*-i)(?!.*--interactive)\s+\S+\s+\S+",
-            severity="medium",
-            message="mv without -i can overwrite files without warning",
-            suggestion="Use 'mv -i' for interactive mode or 'mv -n' for no-clobber",
-        ),
-        Rule(
-            id="STYLE001",
-            name="Use of deprecated backticks",
-            pattern=r"`[^`]+`",
-            severity="low",
+            id="STYLE001", name="Use of deprecated backticks",
+            pattern=r"`[^`]+`", severity="low",
             message="Backticks for command substitution are deprecated",
-            suggestion="Use $() instead of backticks for command substitution",
-        ),
-        Rule(
-            id="STYLE002",
-            name="Long line detected",
-            pattern=r"^.{121,}$",
-            severity="low",
-            message="Line exceeds 120 characters",
-            suggestion="Consider breaking long lines for better readability",
-        ),
-        Rule(
-            id="STYLE003",
-            name="Use of cat with grep",
-            pattern=r"cat\s+\S+\s*\|\s*grep",
-            severity="low",
-            message="Useless use of cat",
-            suggestion="Use grep directly on the file instead of piping cat output",
-        ),
-        Rule(
-            id="STYLE004",
-            name="Missing shebang",
-            pattern=r"^[^#!].*$",
-            severity="low",
-            message="Script missing shebang line",
-            suggestion="Add appropriate shebang like #!/bin/bash or #!/usr/bin/env bash",
+            suggestion="Use $() instead of backticks",
         ),
     ]
 
-    def validate(self, content: str, line_number: Optional[int] = None) -> List[Finding]:
-        """Validate content for best practices."""
+    def __init__(self, custom_rules=None):
+        self.rules = self.DEFAULT_PATTERNS.copy()
+        if custom_rules:
+            self.rules.extend(custom_rules)
+
+    def validate(self, content, line_number=None):
         findings = []
         for rule in self.rules:
             if not rule.enabled:
@@ -108,17 +39,3 @@ class BestPracticesValidator:
                 finding = Finding.from_match(rule, match, line_number, content)
                 findings.append(finding)
         return findings
-
-    def validate_lines(self, lines: List[str]) -> List[Finding]:
-        """Validate multiple lines, tracking line numbers."""
-        findings = []
-        for line_number, line in enumerate(lines, start=1):
-            line_findings = self.validate(line, line_number)
-            for finding in line_findings:
-                finding.context = line
-            findings.extend(line_findings)
-        return findings
-
-    def check(self, command: str) -> List[Finding]:
-        """Check a single command for best practices issues."""
-        return self.validate(command)