Add an indent checker, fix some lines that break it

This is pretty dumb and breaks on valid code, but it's okay
enough for our purposes I think. If I made it any more complex
I'd want to start looking for a third party parser.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

lib/anacondatest.pm

@@ -21,7 +21,8 @@ sub post_fail_hook {
     if (check_screen "anaconda_error_report", 10) {
         assert_and_click "anaconda_error_report";
         $has_traceback = 1;
-    } elsif (check_screen "anaconda_text_error", 10) {  # also for text install
+    } elsif (check_screen "anaconda_text_error", 10) {
+        # also for text install
         type_string "1\n";
         $has_traceback = 1;
     }
@@ -128,7 +129,8 @@ sub root_console {
         # 0 means use console_login's default, non-zero values
         # passed to console_login
         timeout => 0,
-        @_);
+        @_
+    );
     if (get_var("SERIAL_CONSOLE")) {
         # select first virtio terminal, we rely on anaconda having run
         # a root shell on it for us

lib/installedtest.pm

@@ -18,7 +18,8 @@ sub root_console {
     my %args = (
         tty => 1, # what TTY to login to
         timeout => 0, # passed through to console_login
-        @_);
+        @_
+    );
     if (get_var("SERIAL_CONSOLE")) {
         # select the first virtio terminal, for now we assume we can
         # always use that (we may have to make this smarter in future)

lib/utils.pm

@@ -150,7 +150,8 @@ sub console_login {
         password => get_var("ROOT_PASSWORD", "weakpassword"),
         # default is 10 seconds, set below, 0 means 'default'
         timeout => 0,
-        @_);
+        @_
+    );
     $args{timeout} ||= 10;
 
     # Since we do not test many serial console tests, and we probably

perllint.py

@@ -24,14 +24,17 @@ if any line contains a tab, ends with whitespace characters (which
 includes lines containing *only* whitespace characters), or starts
 with a number of spaces that is not divisible by four. If run with
 --write, it will strip trailing whitespace (including turning lines
-that contain only whitespace into blank lines). It does not currently
-attempt to replace tabs or correct leading whitespace.
+that contain only whitespace into blank lines) and correct indentation
+(including removing tabs in indentation). It does not do anything
+with tabs found outside of leading indentation.
 """
 
 import glob
 import os
+import re
 import sys
 
+HEREDOCRE = re.compile(r"<<['\"]?(\w*)['\"]?;\s*$")
 
 def run(write):
     """
@@ -57,12 +60,19 @@ def check_file(filename, write):
     with open(filename, "r", encoding="UTF-8") as readfh:
         lines = readfh.readlines()
         newlines = []
+        indent = 0
+        # indicator whether we're in a heredoc block
+        heredoc = None
         for (num, line) in enumerate(lines, 1):
-            # tab check
-            if "\t" in line:
-                print(f"Line {num} of file {filename} contains a tab!")
-                failed = True
-
+            # if we're in a heredoc, skip all checks, and see if we
+            # ended it
+            if heredoc:
+                if line.strip(" \t").rstrip(" \t\n") == heredoc:
+                    heredoc = None
+                # write the line back to newlines
+                if write:
+                    newlines.append(line)
+                continue
             # trailing whitespace check and replace
             newline = line.rstrip("\n").rstrip(" \t") + "\n"
             if newline != line:
@@ -74,16 +84,45 @@ def check_file(filename, write):
                     line = newline
 
             # correct number of starting spaces check
+            # skip non-indented comment lines
+            if line.startswith("#  "):
+                # write the line back to newlines
+                if write:
+                    newlines.append(line)
+                continue
+            # first update indent if line closes a block
+            if line.strip(" \t").startswith("}") or line.strip(" \t").startswith(")"):
+                indent -= 4
             spaces = 0
             for char in line:
                 if char != " ":
                     break
                 spaces += 1
-            if spaces > 0 and spaces % 4 != 0:
+            if spaces != indent and line != "\n":
                 print(
-                    f"Line {num} of file {filename} starts with an invalid number of spaces!"
+                    f"Line {num} of file {filename} starts with an invalid number of spaces! Expected {indent} got {spaces}"
                 )
                 failed = True
+                if write:
+                    line = line.lstrip()
+                    if line.startswith("\t"):
+                        print(f"Line {num} of file {filename} has a tab in leading whitespace!")
+                        line = line.strip(" \t")
+                    line = " " * indent + line
+            # now update indent if line opens a block (and isn't a comment)
+            if not line.strip(" \t").startswith("#"):
+                if line.rstrip(" \t\n").endswith("{") or line.rstrip(" \t\n").endswith("("):
+                    indent += 4
+
+            # tab check
+            if "\t" in line:
+                print(f"Line {num} of file {filename} contains a tab!")
+                failed = True
+
+            # did the line start a heredoc?
+            herematch = HEREDOCRE.search(line)
+            if herematch:
+                heredoc = herematch.group(1)
 
             # write the line back to newlines
             if write: