add color to NOK, OK, ???, and error prints

I was missing messages. I added color so that mrhlpr is easy to parse for human beings

mrhlpr/frontend.py

@@ -3,6 +3,7 @@
 """Pretty outputs and such."""
 
 import argparse
+from enum import Enum, unique
 import logging
 import sys
 from typing import Any
@@ -19,6 +20,41 @@ from . import mr
 from . import version
 
 
+@unique
+class ColorCode(str, Enum):
+    OKGREEN = "\033[1;32m"
+    ORANGE = "\033[93m"
+    RED = "\033[91m"
+    ENDC = "\033[0m"
+
+
+@unique
+class ActionType(str, Enum):
+    OK = "[OK ]"
+    NOK = "[NOK]"
+    UNKNOWN = "[???]"
+
+    @property
+    def color(self) -> ColorCode:
+        match self:
+            case self.NOK:
+                return ColorCode.RED
+            case self.OK:
+                return ColorCode.OKGREEN
+            case self.UNKNOWN:
+                return ColorCode.ORANGE
+            case _:
+                raise ValueError(f"No defined color for action {self}")
+
+
+def print_action(msg_type: ActionType, message: str) -> None:
+    print(f"{msg_type.color.value}{msg_type} {message}{ColorCode.ENDC.value}")
+
+
+def print_error(message: str) -> None:
+    print(f"{ColorCode.RED.value}{message}{ColorCode.ENDC.value}")
+
+
 def print_status(mr_id: int, no_cache: bool = False) -> None:
     """Print the merge request status. Most info is only visible, when the
     branch is checked out locally. Always display a checklist of things to
@@ -66,103 +102,107 @@ def print_status(mr_id: int, no_cache: bool = False) -> None:
     print()
 
     if status.state == "closed":
-        print("ERROR: MR has been closed.")
+        print_error("ERROR: MR has been closed.")
         exit(1)
     elif status.state == "merged":
-        print("ERROR: MR has been merged.")
+        print_error("ERROR: MR has been merged.")
         exit(1)
 
     # Changes allowed by maintainers
     if status.allow_push:
-        print("[OK ] Changes allowed")
+        action = ActionType.OK
     else:
-        print("[NOK] Changes allowed")
+        action = ActionType.NOK
+    print_action(action, "Changes allowed")
 
     # Clean worktree
     if clean_worktree is None:
-        print("[???] Clean worktree")
+        action = ActionType.UNKNOWN
     elif clean_worktree:
-        print("[OK ] Clean worktree")
+        action = ActionType.OK
     else:
-        print("[NOK] Clean worktree")
+        action = ActionType.NOK
+    print_action(action, "Clean worktree")
 
     # Rebase on target branch
     if is_rebased is None:
-        print(f"[???] Rebase on {target_branch}")
+        action = ActionType.UNKNOWN
     elif is_rebased:
-        print(f"[OK ] Rebase on {target_branch}")
+        action = ActionType.OK
     else:
-        print(f"[NOK] Rebase on {target_branch}")
+        action = ActionType.NOK
+    print_action(action, f"Rebase on {target_branch}")
 
     # MR-ID in all commit messages
     if commits_have_id is None:
-        print("[???] MR-ID in commit msgs")
+        action = ActionType.UNKNOWN
     elif commits_have_id:
-        print("[OK ] MR-ID in commit msgs")
+        action = ActionType.OK
     else:
-        print("[NOK] MR-ID in commit msgs")
+        action = ActionType.NOK
+    print_action(action, "MR-ID in commit msgs")
 
     # All commits follow formatting
     if commits_follow_format is None:
-        print("[???] Commit subjects follow format")
-        for line in subj_err:
-            print("   " + line)
+        action = ActionType.UNKNOWN
     elif commits_follow_format:
-        print("[OK ] Commit subjects follow format")
+        action = ActionType.OK
     else:
-        print("[NOK] Commit subjects follow format")
-        for line in subj_err:
-            print("   " + line)
+        action = ActionType.NOK
+    print_action(action, "Commit subjects follow format")
+    for line in subj_err:
+        print("   " + line)
 
     # Commits are signed
     if commits_are_signed is None:
-        print("[???] Commits are signed")
+        action = ActionType.UNKNOWN
     elif commits_are_signed:
-        print("[OK ] Commits are signed")
+        action = ActionType.OK
     else:
-        print("[NOK] Commits are signed")
+        action = ActionType.NOK
+    print_action(action, "Commits are signed")
 
     # Checklist
     print()
     print("Checklist:")
     if not status.allow_push:
-        print(
+        print_error(
             "* Ask MR author to tick 'Allow commits from members who can"
             " merge to the target branch.'"
         )
-        print("* Check again ('mrhlpr -n status')")
+        print_error("* Check again ('mrhlpr -n status')")
         return
 
     if not is_checked_out:
-        print("* Checkout this MR ('mrhlpr checkout " + str(mr_id) + "')")
+        print_error("* Checkout this MR ('mrhlpr checkout " + str(mr_id) + "')")
         return
 
     if not clean_worktree:
-        print("* Commit or stash changes in your worktree")
-        print("* Check again ('mrhlpr status')")
+        print_error("* Commit or stash changes in your worktree")
+        print_error("* Check again ('mrhlpr status')")
         return
 
     if len(commits) > 1:
-        print(
+        print_error(
             f"* {len(commits)} commits: consider squashing"
             f" ('git rebase -i origin/{target_branch}')"
         )
 
     if not is_rebased:
-        print(f"* Rebase on {target_branch} ('git" f" rebase origin/{target_branch}')")
-        print("* Check again ('mrhlpr status')")
+        print_error(f"* Rebase on {target_branch} ('git" f" rebase origin/{target_branch}')")
+        print_error("* Check again ('mrhlpr status')")
         return
 
     if not commits_have_id or not commits_are_signed:
-        print("* Add the MR-ID to all commits and sign them ('mrhlpr fixmsg')")
+        print_error("* Add the MR-ID to all commits and sign them ('mrhlpr fixmsg')")
         return
 
     if commits_follow_format is False:
-        print("* Fix commit subjects that don't follow the correct formatting")
+        print_error("* Fix commit subjects that don't follow the correct formatting")
         return
 
     if commits_follow_format is None:
-        print("* Manually check if the commit subjects are correct")
+        print_error("* Manually check if the commit subjects are correct")
 
     print("* Pretty 'git log -" + str(len(commits)) + " --pretty'?" + " (consider copying MR desc)")
     print("* Finish the MR: push, approve, merge, comment ('mrhlpr finish')")