feat: add conventional-pre-commit hook

Author: Atiqur Rahman

scripts/conventional-pre-commit.sh

@@ -18,20 +18,16 @@ fi
 # the commit message file is the last remaining arg
 msg_file="$1"
 
-# join types with | to form regex ORs
-r_types="($(IFS='|'; echo "${types[*]}"))"
-# optional (scope)
-r_scope="(\([[:alnum:] \/-]+\))?"
-# optional breaking change indicator and colon delimiter
-r_delim='!?:'
-# subject line, body, footer
-r_subject=" [[:alnum:]].+"
-# the full regex pattern
-pattern="^$r_types$r_scope$r_delim$r_subject$"
+commit_msg_type_regex='feat|fix|refactor|style|test|docs|build'
+commit_msg_scope_regex='.{1,20}'
+commit_msg_subject_regex='.{1,100}'
+commit_msg_regex="^(${commit_msg_type_regex})(\(${commit_msg_scope_regex}\))?: (${commit_msg_subject_regex})\$"
 merge_msg_regex="^Merge branch '.+'\$"
 
+commit_msg_header=$(git show -s --format=%s $msg_file)
+
 # Check if commit is conventional commit
-if grep -Eq "$pattern|$merge_msg_regex" "$msg_file"; then
+if ! [[ "$commit_msg_header" =~ (${commit_msg_regex})|(${merge_msg_regex}) ]]; then
     exit 0
 fi