add info for non_octal permissions (#22972)

## Summary

<!-- What's the purpose of the change? What does it do, and why? -->
Part of #17203, comment:
#18541 (comment)

## Test Plan

<!-- How was it tested? -->
updated snapshot

---------

Signed-off-by: Bhuminjay <bhuminjaysoni@gmail.com>
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>

Author: 11happy

crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs

@@ -113,6 +113,15 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
 
     let mut diagnostic = checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
 
+    let Some(mode) = int.as_u16() else {
+        return;
+    };
+
+    diagnostic.info(format_args!(
+        "Current value of {mode_literal} ({:#05o}) sets permissions: {}",
+        mode & 0o7777,
+        get_permissions(mode)
+    ));
     // Don't suggest a fix for 0x or 0b literals.
     if mode_literal.starts_with("0x") || mode_literal.starts_with("0b") {
         return;
@@ -128,7 +137,10 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     let Some(suggested) = int.as_u16().and_then(suggest_fix) else {
         return;
     };
-
+    let suggested_permissions = get_permissions(suggested);
+    diagnostic.info(format_args!(
+        "Suggested value of {suggested:#05o} sets permissions: {suggested_permissions}"
+    ));
     let edit = Edit::range_replacement(format!("{suggested:#o}"), mode_arg.range());
     diagnostic.set_fix(Fix::unsafe_edit(edit));
 }
@@ -230,3 +242,20 @@ fn suggest_fix(mode: u16) -> Option<u16> {
         _ => None,
     }
 }
+
+fn get_permissions(mode: u16) -> String {
+    let perm = mode & 0o777;
+    let mut out = String::with_capacity(9);
+    let append_permission = |out: &mut String, bits: u16| {
+        out.push(if bits & 0o4 != 0 { 'r' } else { '-' });
+        out.push(if bits & 0o2 != 0 { 'w' } else { '-' });
+        out.push(if bits & 0o1 != 0 { 'x' } else { '-' });
+    };
+    out.push_str("u=");
+    append_permission(&mut out, (perm >> 6) & 0o7);
+    out.push_str(", g=");
+    append_permission(&mut out, (perm >> 3) & 0o7);
+    out.push_str(", o=");
+    append_permission(&mut out, perm & 0o7);
+    out
+}

crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap

@@ -12,6 +12,8 @@ RUF064 [*] Non-octal mode
 8 | os.chmod("foo", 7777)  # Error
   |
 help: Replace with octal literal
+info: Current value of 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--
+info: Suggested value of 0o444 sets permissions: u=r--, g=r--, o=r--
 3 | import os
 4 | from pathlib import Path
 5 | 
@@ -33,6 +35,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
+info: Current value of 7777 (0o7141) sets permissions: u=--x, g=r--, o=--x
 
 RUF064 Non-octal mode
   --> RUF064.py:9:17
@@ -44,6 +47,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
+info: Current value of 10000 (0o3420) sets permissions: u=r--, g=-w-, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:10:17
@@ -67,6 +71,8 @@ RUF064 [*] Non-octal mode
 13 | os.umask(0o777)  # OK
    |
 help: Replace with octal literal
+info: Current value of 777 (0o1411) sets permissions: u=r--, g=--x, o=--x
+info: Suggested value of 0o777 sets permissions: u=rwx, g=rwx, o=rwx
 9  | os.chmod("foo", 10000)  # Error
 10 | os.chmod("foo", 99999)  # Error
 11 | 
@@ -87,6 +93,8 @@ RUF064 [*] Non-octal mode
 16 | os.fchmod(0, 0o400)  # OK
    |
 help: Replace with octal literal
+info: Current value of 400 (0o620) sets permissions: u=rw-, g=-w-, o=---
+info: Suggested value of 0o400 sets permissions: u=r--, g=---, o=---
 12 | os.umask(777)  # Error
 13 | os.umask(0o777)  # OK
 14 | 
@@ -107,6 +115,8 @@ RUF064 [*] Non-octal mode
 19 | os.lchmod("foo", 0o755)  # OK
    |
 help: Replace with octal literal
+info: Current value of 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 15 | os.fchmod(0, 400)  # Error
 16 | os.fchmod(0, 0o400)  # OK
 17 | 
@@ -127,6 +137,8 @@ RUF064 [*] Non-octal mode
 22 | os.mkdir("foo", 0o600)  # OK
    |
 help: Replace with octal literal
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 18 | os.lchmod("foo", 755)  # Error
 19 | os.lchmod("foo", 0o755)  # OK
 20 | 
@@ -147,6 +159,8 @@ RUF064 [*] Non-octal mode
 25 | os.makedirs("foo", 0o644)  # OK
    |
 help: Replace with octal literal
+info: Current value of 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
+info: Suggested value of 0o644 sets permissions: u=rw-, g=r--, o=r--
 21 | os.mkdir("foo", 600)  # Error
 22 | os.mkdir("foo", 0o600)  # OK
 23 | 
@@ -167,6 +181,8 @@ RUF064 [*] Non-octal mode
 28 | os.mkfifo("foo", 0o640)  # OK
    |
 help: Replace with octal literal
+info: Current value of 640 (0o1200) sets permissions: u=-w-, g=---, o=---
+info: Suggested value of 0o640 sets permissions: u=rw-, g=r--, o=---
 24 | os.makedirs("foo", 644)  # Error
 25 | os.makedirs("foo", 0o644)  # OK
 26 | 
@@ -187,6 +203,8 @@ RUF064 [*] Non-octal mode
 31 | os.mknod("foo", 0o660)  # OK
    |
 help: Replace with octal literal
+info: Current value of 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--
+info: Suggested value of 0o660 sets permissions: u=rw-, g=rw-, o=---
 27 | os.mkfifo("foo", 640)  # Error
 28 | os.mkfifo("foo", 0o640)  # OK
 29 | 
@@ -207,6 +225,8 @@ RUF064 [*] Non-octal mode
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
    |
 help: Replace with octal literal
+info: Current value of 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
+info: Suggested value of 0o644 sets permissions: u=rw-, g=r--, o=r--
 30 | os.mknod("foo", 660)  # Error
 31 | os.mknod("foo", 0o660)  # OK
 32 | 
@@ -227,6 +247,8 @@ RUF064 [*] Non-octal mode
 37 | Path("bar").chmod(0o755)  # OK
    |
 help: Replace with octal literal
+info: Current value of 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 33 | os.open("foo", os.O_CREAT, 644)  # Error
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
 35 | 
@@ -246,6 +268,8 @@ RUF064 [*] Non-octal mode
 41 | path.chmod(0o755)  # OK
    |
 help: Replace with octal literal
+info: Current value of 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 37 | Path("bar").chmod(0o755)  # OK
 38 | 
 39 | path = Path("bar")
@@ -266,6 +290,8 @@ RUF064 [*] Non-octal mode
 44 | dbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 40 | path.chmod(755)  # Error
 41 | path.chmod(0o755)  # OK
 42 | 
@@ -286,6 +312,8 @@ RUF064 [*] Non-octal mode
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 43 | dbm.open("db", "r", 600)  # Error
 44 | dbm.open("db", "r", 0o600)  # OK
 45 | 
@@ -306,6 +334,8 @@ RUF064 [*] Non-octal mode
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 46 | dbm.gnu.open("db", "r", 600)  # Error
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
 48 | 
@@ -326,6 +356,8 @@ RUF064 [*] Non-octal mode
 53 | os.fchmod(0, 493)  # 0o755
    |
 help: Replace with octal literal
+info: Current value of 256 (0o400) sets permissions: u=r--, g=---, o=---
+info: Suggested value of 0o400 sets permissions: u=r--, g=---, o=---
 49 | dbm.ndbm.open("db", "r", 600)  # Error
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
@@ -346,6 +378,8 @@ RUF064 [*] Non-octal mode
 55 | # https://github.com/astral-sh/ruff/issues/19010
    |
 help: Replace with octal literal
+info: Current value of 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
 52 | os.fchmod(0, 256)  # 0o400
@@ -365,6 +399,7 @@ RUF064 [*] Non-octal mode
 57 | os.chmod("foo", 0000)  # Error
    |
 help: Replace with octal literal
+info: Current value of 000 (0o000) sets permissions: u=---, g=---, o=---
 53 | os.fchmod(0, 493)  # 0o755
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
@@ -385,6 +420,7 @@ RUF064 [*] Non-octal mode
 59 | os.chmod("foo", 0b0)  # Error
    |
 help: Replace with octal literal
+info: Current value of 0000 (0o000) sets permissions: u=---, g=---, o=---
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
 56 | os.chmod("foo", 000)  # Error
@@ -405,6 +441,7 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
+info: Current value of 0b0 (0o000) sets permissions: u=---, g=---, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:60:17
@@ -415,3 +452,4 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
+info: Current value of 0x0 (0o000) sets permissions: u=---, g=---, o=---