# here-doc -- swallow it to avoid false hits within its body (but keep the
# command to which it was attached)
-/<<[ ]*[-\\']*[A-Za-z0-9_]/ {
- s/^\(.*\)<<[ ]*[-\\']*\([A-Za-z0-9_][A-Za-z0-9_]*\)'*/<\2>\1<</
+/<<[ ]*[-\\'"]*[A-Za-z0-9_]/ {
+ s/^\(.*\)<<[ ]*[-\\'"]*\([A-Za-z0-9_][A-Za-z0-9_]*\)['"]*/<\2>\1<</
s/[ ]*<<//
- :hereslurp
+ :hered
N
/^<\([^>]*\)>.*\n[ ]*\1[ ]*$/!{
s/\n.*$//
- bhereslurp
+ bhered
}
s/^<[^>]*>//
s/\n.*$//
b
:subshell
-# bare "(" line?
+# bare "(" line? -- stash for later printing
/^[ ]*([ ]*$/ {
- # stash for later printing
h
bnextline
}
:slurp
# incomplete line "...\"
-/\\$/bincomplete
-# multi-line quoted string "...\n..."
-/^[^"]*"[^"]*$/bdqstring
-# multi-line quoted string '...\n...' (but not contraction in string "it's so")
-/^[^']*'[^']*$/{
+/\\$/bicmplte
+# multi-line quoted string "...\n..."?
+/"/bdqstring
+# multi-line quoted string '...\n...'? (but not contraction in string "it's")
+/'/{
/"[^'"]*'[^'"]*"/!bsqstring
}
+:folded
# here-doc -- swallow it
-/<<[ ]*[-\\']*[A-Za-z0-9_]/bheredoc
+/<<[ ]*[-\\'"]*[A-Za-z0-9_]/bheredoc
# comment or empty line -- discard since final non-comment, non-empty line
# before closing ")", "done", "elsif", "else", or "fi" will need to be
# re-visited to drop "suspect" marking since final line of those constructs
/"[^"]*#[^"]*"/!s/[ ]#.*$//
}
# one-liner "case ... esac"
-/^[ ]*case[ ]*..*esac/bcheckchain
+/^[ ]*case[ ]*..*esac/bchkchn
# multi-line "case ... esac"
/^[ ]*case[ ]..*[ ]in/bcase
# multi-line "for ... done" or "while ... done"
/^[ ]*fi[ ]*[<>|]/bdone
/^[ ]*fi[ ]*)/bdone
# nested one-liner "(...) &&"
-/^[ ]*(.*)[ ]*&&[ ]*$/bcheckchain
+/^[ ]*(.*)[ ]*&&[ ]*$/bchkchn
# nested one-liner "(...)"
-/^[ ]*(.*)[ ]*$/bcheckchain
+/^[ ]*(.*)[ ]*$/bchkchn
# nested one-liner "(...) >x" (or "2>x" or "<x" or "|x")
-/^[ ]*(.*)[ ]*[0-9]*[<>|]/bcheckchain
+/^[ ]*(.*)[ ]*[0-9]*[<>|]/bchkchn
# nested multi-line "(...\n...)"
/^[ ]*(/bnest
# multi-line "{...\n...}"
/^[ ]*{/bblock
# closing ")" on own line -- exit subshell
-/^[ ]*)/bclosesolo
+/^[ ]*)/bclssolo
# "$((...))" -- arithmetic expansion; not closing ")"
-/\$(([^)][^)]*))[^)]*$/bcheckchain
+/\$(([^)][^)]*))[^)]*$/bchkchn
# "$(...)" -- command substitution; not closing ")"
-/\$([^)][^)]*)[^)]*$/bcheckchain
+/\$([^)][^)]*)[^)]*$/bchkchn
# multi-line "$(...\n...)" -- command substitution; treat as nested subshell
/\$([^)]*$/bnest
# "=(...)" -- Bash array assignment; not closing ")"
-/=(/bcheckchain
+/=(/bchkchn
# closing "...) &&"
/)[ ]*&&[ ]*$/bclose
# closing "...)"
/)[ ]*$/bclose
# closing "...) >x" (or "2>x" or "<x" or "|x")
/)[ ]*[<>|]/bclose
-:checkchain
+:chkchn
# mark suspect if line uses ";" internally rather than "&&" (but not ";" in a
# string and not ";;" in one-liner "case...esac")
/;/{
bslurp
# found incomplete line "...\" -- slurp up next line
-:incomplete
+:icmplte
N
s/\\\n//
bslurp
-# found multi-line double-quoted string "...\n..." -- slurp until end of string
+# check for multi-line double-quoted string "...\n..." -- fold to one line
:dqstring
-s/"//g
+# remove all quote pairs
+s/"\([^"]*\)"/@!\1@!/g
+# done if no dangling quote
+/"/!bdqdone
+# otherwise, slurp next line and try again
N
s/\n//
-/"/!bdqstring
-bcheckchain
+bdqstring
+:dqdone
+s/@!/"/g
+bfolded
-# found multi-line single-quoted string '...\n...' -- slurp until end of string
+# check for multi-line single-quoted string '...\n...' -- fold to one line
:sqstring
-s/'//g
+# remove all quote pairs
+s/'\([^']*\)'/@!\1@!/g
+# done if no dangling quote
+/'/!bsqdone
+# otherwise, slurp next line and try again
N
s/\n//
-/'/!bsqstring
-bcheckchain
+bsqstring
+:sqdone
+s/@!/'/g
+bfolded
# found here-doc -- swallow it to avoid false hits within its body (but keep
# the command to which it was attached)
:heredoc
-s/^\(.*\)<<[ ]*[-\\']*\([A-Za-z0-9_][A-Za-z0-9_]*\)'*/<\2>\1<</
+s/^\(.*\)<<[ ]*[-\\'"]*\([A-Za-z0-9_][A-Za-z0-9_]*\)['"]*/<\2>\1<</
s/[ ]*<<//
-:hereslurpsub
+:heredsub
N
/^<\([^>]*\)>.*\n[ ]*\1[ ]*$/!{
s/\n.*$//
- bhereslurpsub
+ bheredsub
}
s/^<[^>]*>//
s/\n.*$//
-bcheckchain
+bfolded
# found "case ... in" -- pass through untouched
:case
# is 'done' or 'fi' cuddled with ")" to close subshell?
/done.*)/bclose
/fi.*)/bclose
-bcheckchain
+bchkchn
# found nested multi-line "(...\n...)" -- pass through untouched
:nest
x
-:nestslurp
+:nstslurp
n
# closing ")" on own line -- stop nested slurp
-/^[ ]*)/bnestclose
+/^[ ]*)/bnstclose
# comment -- not closing ")" if in comment
-/^[ ]*#/bnestcontinue
+/^[ ]*#/bnstcnt
# "$((...))" -- arithmetic expansion; not closing ")"
-/\$(([^)][^)]*))[^)]*$/bnestcontinue
+/\$(([^)][^)]*))[^)]*$/bnstcnt
# "$(...)" -- command substitution; not closing ")"
-/\$([^)][^)]*)[^)]*$/bnestcontinue
+/\$([^)][^)]*)[^)]*$/bnstcnt
# closing "...)" -- stop nested slurp
-/)/bnestclose
-:nestcontinue
+/)/bnstclose
+:nstcnt
x
-bnestslurp
-:nestclose
+bnstslurp
+:nstclose
s/^/>>/
# is it "))" which closes nested and parent subshells?
/)[ ]*)/bslurp
-bcheckchain
+bchkchn
# found multi-line "{...\n...}" block -- pass through untouched
:block
x
n
# closing "}" -- stop block slurp
-/}/bcheckchain
+/}/bchkchn
bblock
# found closing ")" on own line -- drop "suspect" from final line of subshell
# since that line legitimately lacks "&&" and exit subshell loop
-:closesolo
+:clssolo
x
s/?!AMP?!//
p