feat: check all autosquash messages

Expand the autosquash prefixes from just `fixup!` to now include
`squash!` and `amend!`. These are the prefixes supported by default when
using [Git's
`--autosquash`](https://git-scm.com/docs/git-rebase#Documentation/git-rebase.txt---autosquash).

Signed-off-by: JP-Ellis <[email protected]>

crates/committed/src/checks.rs

@@ -1,6 +1,8 @@
 use crate::report;
 use committed::Style;
 
+const AUTOSQUASH_PREFIXES: [&str; 3] = ["fixup! ", "squash! ", "amend! "];
+
 pub(crate) fn check_message(
  source: report::Source<'_>,
  message: &str,
@@ -18,7 +20,7 @@ pub(crate) fn check_message(
  failed |= check_wip(source, message, report)?;
  }
  if config.no_fixup() {
- failed |= check_fixup(source, message, report)?;
+ failed |= check_autosquash(source, message, report)?;
  }
  // Bail out due to above checks
  if failed {
@@ -313,13 +315,13 @@ pub(crate) fn check_wip(
  }
 }
 
-pub(crate) fn check_fixup(
+pub(crate) fn check_autosquash(
  source: report::Source<'_>,
  message: &str,
  report: report::Report,
 ) -> Result<bool, anyhow::Error> {
- if message.starts_with("fixup! ") {
- report(report::Message::error(source, report::Fixup {}));
+ if AUTOSQUASH_PREFIXES.iter().any(|prefix| message.starts_with(prefix)) {
+ report(report::Message::error(source, report::Autosquash {}));
  Ok(true)
  } else {
  Ok(false)

crates/committed/src/report.rs

@@ -63,7 +63,7 @@ pub(crate) enum Content<'s> {
  NoPunctuation(NoPunctuation),
  Imperative(Imperative<'s>),
  Wip(Wip),
- Fixup(Fixup),
+ Autosquash(Autosquash),
  InvalidCommitFormat(InvalidCommitFormat),
  DisallowedCommitType(DisallowedCommitType),
  MergeCommitDisallowed(MergeCommitDisallowed),
@@ -129,7 +129,7 @@ pub(crate) struct Wip {}
 #[serde(rename_all = "snake_case")]
 #[derive(derive_more::Display)]
 #[display("Fixup commits must be squashed")]
-pub(crate) struct Fixup {}
+pub(crate) struct Autosquash {}
 
 #[derive(Debug, serde::Serialize)]
 #[serde(rename_all = "snake_case")]