Add a verbose mode: `-S verbose`

CHANGELOG.md

@@ -3,6 +3,7 @@
 - Preliminary support for fix suggestions
 - Files containing Bats tests can now be checked
 - Directory wide directives can now be placed in a `.shellcheckrc`
+- Verbose mode: Use `-S verbose` for especially pedantic suggestions
 - SC2247: Warn about $"(cmd)" and $"{var}"
 - SC2246: Warn if a shebang's interpreter ends with /
 - SC2245: Warn that Ksh ignores all but the first glob result in `[`

shellcheck.1.md

@@ -69,8 +69,9 @@ not warn at all, as `ksh` supports decimals in arithmetic contexts.
 
 **-S**\ *SEVERITY*,\ **--severity=***severity*
 
-:   Specify minimum severity of errors to consider. Valid values are *error*,
-    *warning*, *info* and *style*.    The default is *style*.
+:   Specify minimum severity of errors to consider. Valid values in order of
+    severity are *error*, *warning*, *info*, *style* and *verbose*.
+    The default is *style*.
 
 **-s**\ *shell*,\ **--shell=***shell*
 

shellcheck.hs

@@ -103,7 +103,7 @@ options = [
         "Specify dialect (sh, bash, dash, ksh)",
     Option "S" ["severity"]
         (ReqArg (Flag "severity") "SEVERITY")
-        "Minimum severity of errors to consider (error, warning, info, style)",
+        "Minimum severity of errors to consider (error, warning, info, style, verbose)",
     Option "V" ["version"]
         (NoArg $ Flag "version" "true") "Print version information",
     Option "W" ["wiki-link-count"]
@@ -254,7 +254,8 @@ parseSeverityOption value =
         ("error",   ErrorC),
         ("warning", WarningC),
         ("info",    InfoC),
-        ("style",   StyleC)
+        ("style",   StyleC),
+        ("verbose", VerboseC)
         ]
 
 parseOption flag options =

src/ShellCheck/Formatter/Format.hs

@@ -47,6 +47,7 @@ severityText pc =
         WarningC -> "warning"
         InfoC    -> "info"
         StyleC   -> "style"
+        VerboseC -> "verbose"
 
 -- Realign comments from a tabstop of 8 to 1
 makeNonVirtual comments contents =

src/ShellCheck/Formatter/TTY.hs

@@ -57,6 +57,7 @@ colorForLevel level =
         "warning" -> 33 -- yellow
         "info"    -> 32 -- green
         "style"   -> 32 -- green
+        "verbose" -> 32 -- green
         "message" -> 1 -- bold
         "source"  -> 0 -- none
         _ -> 0         -- none

src/ShellCheck/Interface.hs

@@ -32,7 +32,7 @@ module ShellCheck.Interface
     , ExecutionMode(Executed, Sourced)
     , ErrorMessage
     , Code
-    , Severity(ErrorC, WarningC, InfoC, StyleC)
+    , Severity(ErrorC, WarningC, InfoC, StyleC, VerboseC)
     , Position(posFile, posLine, posColumn)
     , Comment(cSeverity, cCode, cMessage)
     , PositionedComment(pcStartPos , pcEndPos , pcComment, pcFix)
@@ -189,7 +189,7 @@ data ExecutionMode = Executed | Sourced deriving (Show, Eq)
 type ErrorMessage = String
 type Code = Integer
 
-data Severity = ErrorC | WarningC | InfoC | StyleC
+data Severity = ErrorC | WarningC | InfoC | StyleC | VerboseC
     deriving (Show, Eq, Ord, Generic, NFData)
 data Position = Position {
     posFile :: String,    -- Filename