mirror of
https://github.com/git/git
synced 2024-10-30 04:01:21 +00:00
e9983f8965
The test linter code has learned that the end of here-doc mark "EOF" can be quoted in a double-quote pair, not just in a single-quote pair. * es/chain-lint-more: chainlint: match "quoted" here-doc tags
369 lines
11 KiB
Sed
369 lines
11 KiB
Sed
#------------------------------------------------------------------------------
|
|
# Detect broken &&-chains in tests.
|
|
#
|
|
# At present, only &&-chains in subshells are examined by this linter;
|
|
# top-level &&-chains are instead checked directly by the test framework. Like
|
|
# the top-level &&-chain linter, the subshell linter (intentionally) does not
|
|
# check &&-chains within {...} blocks.
|
|
#
|
|
# Checking for &&-chain breakage is done line-by-line by pure textual
|
|
# inspection.
|
|
#
|
|
# Incomplete lines (those ending with "\") are stitched together with following
|
|
# lines to simplify processing, particularly of "one-liner" statements.
|
|
# Top-level here-docs are swallowed to avoid false positives within the
|
|
# here-doc body, although the statement to which the here-doc is attached is
|
|
# retained.
|
|
#
|
|
# Heuristics are used to detect end-of-subshell when the closing ")" is cuddled
|
|
# with the final subshell statement on the same line:
|
|
#
|
|
# (cd foo &&
|
|
# bar)
|
|
#
|
|
# in order to avoid misinterpreting the ")" in constructs such as "x=$(...)"
|
|
# and "case $x in *)" as ending the subshell.
|
|
#
|
|
# Lines missing a final "&&" are flagged with "?!AMP?!", and lines which chain
|
|
# commands with ";" internally rather than "&&" are flagged "?!SEMI?!". A line
|
|
# may be flagged for both violations.
|
|
#
|
|
# Detection of a missing &&-link in a multi-line subshell is complicated by the
|
|
# fact that the last statement before the closing ")" must not end with "&&".
|
|
# Since processing is line-by-line, it is not known whether a missing "&&" is
|
|
# legitimate or not until the _next_ line is seen. To accommodate this, within
|
|
# multi-line subshells, each line is stored in sed's "hold" area until after
|
|
# the next line is seen and processed. If the next line is a stand-alone ")",
|
|
# then a missing "&&" on the previous line is legitimate; otherwise a missing
|
|
# "&&" is a break in the &&-chain.
|
|
#
|
|
# (
|
|
# cd foo &&
|
|
# bar
|
|
# )
|
|
#
|
|
# In practical terms, when "bar" is encountered, it is flagged with "?!AMP?!",
|
|
# but when the stand-alone ")" line is seen which closes the subshell, the
|
|
# "?!AMP?!" violation is removed from the "bar" line (retrieved from the "hold"
|
|
# area) since the final statement of a subshell must not end with "&&". The
|
|
# final line of a subshell may still break the &&-chain by using ";" internally
|
|
# to chain commands together rather than "&&", so "?!SEMI?!" is never removed
|
|
# from a line (even though "?!AMP?!" might be).
|
|
#
|
|
# Care is taken to recognize the last _statement_ of a multi-line subshell, not
|
|
# necessarily the last textual _line_ within the subshell, since &&-chaining
|
|
# applies to statements, not to lines. Consequently, blank lines, comment
|
|
# lines, and here-docs are swallowed (but not the command to which the here-doc
|
|
# is attached), leaving the last statement in the "hold" area, not the last
|
|
# line, thus simplifying &&-link checking.
|
|
#
|
|
# The final statement before "done" in for- and while-loops, and before "elif",
|
|
# "else", and "fi" in if-then-else likewise must not end with "&&", thus
|
|
# receives similar treatment.
|
|
#
|
|
# Swallowing here-docs with arbitrary tags requires a bit of finesse. When a
|
|
# line such as "cat <<EOF >out" is seen, the here-doc tag is moved to the front
|
|
# of the line enclosed in angle brackets as a sentinel, giving "<EOF>cat >out".
|
|
# As each subsequent line is read, it is appended to the target line and a
|
|
# (whitespace-loose) back-reference match /^<(.*)>\n\1$/ is attempted to see if
|
|
# the content inside "<...>" matches the entirety of the newly-read line. For
|
|
# instance, if the next line read is "some data", when concatenated with the
|
|
# target line, it becomes "<EOF>cat >out\nsome data", and a match is attempted
|
|
# to see if "EOF" matches "some data". Since it doesn't, the next line is
|
|
# attempted. When a line consisting of only "EOF" (and possible whitespace) is
|
|
# encountered, it is appended to the target line giving "<EOF>cat >out\nEOF",
|
|
# in which case the "EOF" inside "<...>" does match the text following the
|
|
# newline, thus the closing here-doc tag has been found. The closing tag line
|
|
# and the "<...>" prefix on the target line are then discarded, leaving just
|
|
# the target line "cat >out".
|
|
#
|
|
# To facilitate regression testing (and manual debugging), a ">" annotation is
|
|
# applied to the line containing ")" which closes a subshell, ">>" to a line
|
|
# closing a nested subshell, and ">>>" to a line closing both at once. This
|
|
# makes it easy to detect whether the heuristics correctly identify
|
|
# end-of-subshell.
|
|
#------------------------------------------------------------------------------
|
|
|
|
# incomplete line -- slurp up next line
|
|
:squash
|
|
/\\$/ {
|
|
N
|
|
s/\\\n//
|
|
bsquash
|
|
}
|
|
|
|
# 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<</
|
|
s/[ ]*<<//
|
|
:hered
|
|
N
|
|
/^<\([^>]*\)>.*\n[ ]*\1[ ]*$/!{
|
|
s/\n.*$//
|
|
bhered
|
|
}
|
|
s/^<[^>]*>//
|
|
s/\n.*$//
|
|
}
|
|
|
|
# one-liner "(...) &&"
|
|
/^[ ]*!*[ ]*(..*)[ ]*&&[ ]*$/boneline
|
|
|
|
# same as above but without trailing "&&"
|
|
/^[ ]*!*[ ]*(..*)[ ]*$/boneline
|
|
|
|
# one-liner "(...) >x" (or "2>x" or "<x" or "|x" or "&"
|
|
/^[ ]*!*[ ]*(..*)[ ]*[0-9]*[<>|&]/boneline
|
|
|
|
# multi-line "(...\n...)"
|
|
/^[ ]*(/bsubshell
|
|
|
|
# innocuous line -- print it and advance to next line
|
|
b
|
|
|
|
# found one-liner "(...)" -- mark suspect if it uses ";" internally rather than
|
|
# "&&" (but not ";" in a string)
|
|
:oneline
|
|
/;/{
|
|
/"[^"]*;[^"]*"/!s/^/?!SEMI?!/
|
|
}
|
|
b
|
|
|
|
:subshell
|
|
# bare "(" line? -- stash for later printing
|
|
/^[ ]*([ ]*$/ {
|
|
h
|
|
bnextline
|
|
}
|
|
# "(..." line -- split off and stash "(", then process "..." as its own line
|
|
x
|
|
s/.*/(/
|
|
x
|
|
s/(//
|
|
bslurp
|
|
|
|
:nextline
|
|
N
|
|
s/.*\n//
|
|
|
|
:slurp
|
|
# incomplete line "...\"
|
|
/\\$/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
|
|
# 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
|
|
# legitimately lacks "&&", so "suspect" mark must be removed
|
|
/^[ ]*#/bnextline
|
|
/^[ ]*$/bnextline
|
|
# in-line comment -- strip it (but not "#" in a string, Bash ${#...} array
|
|
# length, or Perforce "//depot/path#42" revision in filespec)
|
|
/[ ]#/{
|
|
/"[^"]*#[^"]*"/!s/[ ]#.*$//
|
|
}
|
|
# one-liner "case ... esac"
|
|
/^[ ]*case[ ]*..*esac/bchkchn
|
|
# multi-line "case ... esac"
|
|
/^[ ]*case[ ]..*[ ]in/bcase
|
|
# multi-line "for ... done" or "while ... done"
|
|
/^[ ]*for[ ]..*[ ]in/bcontinue
|
|
/^[ ]*while[ ]/bcontinue
|
|
/^[ ]*do[ ]/bcontinue
|
|
/^[ ]*do[ ]*$/bcontinue
|
|
/;[ ]*do/bcontinue
|
|
/^[ ]*done[ ]*&&[ ]*$/bdone
|
|
/^[ ]*done[ ]*$/bdone
|
|
/^[ ]*done[ ]*[<>|]/bdone
|
|
/^[ ]*done[ ]*)/bdone
|
|
/||[ ]*exit[ ]/bcontinue
|
|
/||[ ]*exit[ ]*$/bcontinue
|
|
# multi-line "if...elsif...else...fi"
|
|
/^[ ]*if[ ]/bcontinue
|
|
/^[ ]*then[ ]/bcontinue
|
|
/^[ ]*then[ ]*$/bcontinue
|
|
/;[ ]*then/bcontinue
|
|
/^[ ]*elif[ ]/belse
|
|
/^[ ]*elif[ ]*$/belse
|
|
/^[ ]*else[ ]/belse
|
|
/^[ ]*else[ ]*$/belse
|
|
/^[ ]*fi[ ]*&&[ ]*$/bdone
|
|
/^[ ]*fi[ ]*$/bdone
|
|
/^[ ]*fi[ ]*[<>|]/bdone
|
|
/^[ ]*fi[ ]*)/bdone
|
|
# nested one-liner "(...) &&"
|
|
/^[ ]*(.*)[ ]*&&[ ]*$/bchkchn
|
|
# nested one-liner "(...)"
|
|
/^[ ]*(.*)[ ]*$/bchkchn
|
|
# nested one-liner "(...) >x" (or "2>x" or "<x" or "|x")
|
|
/^[ ]*(.*)[ ]*[0-9]*[<>|]/bchkchn
|
|
# nested multi-line "(...\n...)"
|
|
/^[ ]*(/bnest
|
|
# multi-line "{...\n...}"
|
|
/^[ ]*{/bblock
|
|
# closing ")" on own line -- exit subshell
|
|
/^[ ]*)/bclssolo
|
|
# "$((...))" -- arithmetic expansion; not closing ")"
|
|
/\$(([^)][^)]*))[^)]*$/bchkchn
|
|
# "$(...)" -- command substitution; not closing ")"
|
|
/\$([^)][^)]*)[^)]*$/bchkchn
|
|
# multi-line "$(...\n...)" -- command substitution; treat as nested subshell
|
|
/\$([^)]*$/bnest
|
|
# "=(...)" -- Bash array assignment; not closing ")"
|
|
/=(/bchkchn
|
|
# closing "...) &&"
|
|
/)[ ]*&&[ ]*$/bclose
|
|
# closing "...)"
|
|
/)[ ]*$/bclose
|
|
# closing "...) >x" (or "2>x" or "<x" or "|x")
|
|
/)[ ]*[<>|]/bclose
|
|
:chkchn
|
|
# mark suspect if line uses ";" internally rather than "&&" (but not ";" in a
|
|
# string and not ";;" in one-liner "case...esac")
|
|
/;/{
|
|
/;;/!{
|
|
/"[^"]*;[^"]*"/!s/^/?!SEMI?!/
|
|
}
|
|
}
|
|
# line ends with pipe "...|" -- valid; not missing "&&"
|
|
/|[ ]*$/bcontinue
|
|
# missing end-of-line "&&" -- mark suspect
|
|
/&&[ ]*$/!s/^/?!AMP?!/
|
|
:continue
|
|
# retrieve and print previous line
|
|
x
|
|
n
|
|
bslurp
|
|
|
|
# found incomplete line "...\" -- slurp up next line
|
|
:icmplte
|
|
N
|
|
s/\\\n//
|
|
bslurp
|
|
|
|
# check for multi-line double-quoted string "...\n..." -- fold to one line
|
|
:dqstring
|
|
# remove all quote pairs
|
|
s/"\([^"]*\)"/@!\1@!/g
|
|
# done if no dangling quote
|
|
/"/!bdqdone
|
|
# otherwise, slurp next line and try again
|
|
N
|
|
s/\n//
|
|
bdqstring
|
|
:dqdone
|
|
s/@!/"/g
|
|
bfolded
|
|
|
|
# check for multi-line single-quoted string '...\n...' -- fold to one line
|
|
:sqstring
|
|
# remove all quote pairs
|
|
s/'\([^']*\)'/@!\1@!/g
|
|
# done if no dangling quote
|
|
/'/!bsqdone
|
|
# otherwise, slurp next line and try again
|
|
N
|
|
s/\n//
|
|
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/[ ]*<<//
|
|
:heredsub
|
|
N
|
|
/^<\([^>]*\)>.*\n[ ]*\1[ ]*$/!{
|
|
s/\n.*$//
|
|
bheredsub
|
|
}
|
|
s/^<[^>]*>//
|
|
s/\n.*$//
|
|
bfolded
|
|
|
|
# found "case ... in" -- pass through untouched
|
|
:case
|
|
x
|
|
n
|
|
/^[ ]*esac/bslurp
|
|
bcase
|
|
|
|
# found "else" or "elif" -- drop "suspect" from final line before "else" since
|
|
# that line legitimately lacks "&&"
|
|
:else
|
|
x
|
|
s/?!AMP?!//
|
|
x
|
|
bcontinue
|
|
|
|
# found "done" closing for-loop or while-loop, or "fi" closing if-then -- drop
|
|
# "suspect" from final contained line since that line legitimately lacks "&&"
|
|
:done
|
|
x
|
|
s/?!AMP?!//
|
|
x
|
|
# is 'done' or 'fi' cuddled with ")" to close subshell?
|
|
/done.*)/bclose
|
|
/fi.*)/bclose
|
|
bchkchn
|
|
|
|
# found nested multi-line "(...\n...)" -- pass through untouched
|
|
:nest
|
|
x
|
|
:nstslurp
|
|
n
|
|
# closing ")" on own line -- stop nested slurp
|
|
/^[ ]*)/bnstclose
|
|
# comment -- not closing ")" if in comment
|
|
/^[ ]*#/bnstcnt
|
|
# "$((...))" -- arithmetic expansion; not closing ")"
|
|
/\$(([^)][^)]*))[^)]*$/bnstcnt
|
|
# "$(...)" -- command substitution; not closing ")"
|
|
/\$([^)][^)]*)[^)]*$/bnstcnt
|
|
# closing "...)" -- stop nested slurp
|
|
/)/bnstclose
|
|
:nstcnt
|
|
x
|
|
bnstslurp
|
|
:nstclose
|
|
s/^/>>/
|
|
# is it "))" which closes nested and parent subshells?
|
|
/)[ ]*)/bslurp
|
|
bchkchn
|
|
|
|
# found multi-line "{...\n...}" block -- pass through untouched
|
|
:block
|
|
x
|
|
n
|
|
# closing "}" -- stop block slurp
|
|
/}/bchkchn
|
|
bblock
|
|
|
|
# found closing ")" on own line -- drop "suspect" from final line of subshell
|
|
# since that line legitimately lacks "&&" and exit subshell loop
|
|
:clssolo
|
|
x
|
|
s/?!AMP?!//
|
|
p
|
|
x
|
|
s/^/>/
|
|
b
|
|
|
|
# found closing "...)" -- exit subshell loop
|
|
:close
|
|
x
|
|
p
|
|
x
|
|
s/^/>/
|
|
b
|