After swallowing a here-doc, chainlint.sed assumes that no other
processing needs to be done on the line aside from checking for &&-chain
breakage; likewise, after folding a multi-line quoted string. However,
it's conceivable (even if unlikely in practice) that both a here-doc and
a multi-line quoted string might commence on the same line:
cat <<\EOF && echo "foo
bar"
data
EOF
Support this case by sending the line (after swallowing and folding)
through the normal processing sequence rather than jumping directly to
the check for broken &&-chain.
This change also allows other somewhat pathological cases to be handled,
such as closing a subshell on the same line starting a here-doc:
(
cat <<-\INPUT)
data
INPUT
or, for instance, opening a multi-line $(...) expression on the same
line starting a here-doc:
x=$(cat <<-\END &&
data
END
echo "x")
among others.
Signed-off-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
---
t/chainlint.sed | 7 ++++---
t/chainlint/here-doc-close-subshell.expect | 2 ++
t/chainlint/here-doc-close-subshell.test | 5 +++++
t/chainlint/here-doc-multi-line-command-subst.expect | 5 +++++
t/chainlint/here-doc-multi-line-command-subst.test | 9 +++++++++
t/chainlint/here-doc-multi-line-string.expect | 4 ++++
t/chainlint/here-doc-multi-line-string.test | 8 ++++++++
7 files changed, 37 insertions(+), 3 deletions(-)
create mode 100644 t/chainlint/here-doc-close-subshell.expect
create mode 100644 t/chainlint/here-doc-close-subshell.test
create mode 100644 t/chainlint/here-doc-multi-line-command-subst.expect
create mode 100644 t/chainlint/here-doc-multi-line-command-subst.test
create mode 100644 t/chainlint/here-doc-multi-line-string.expect
create mode 100644 t/chainlint/here-doc-multi-line-string.test
diff --git a/t/chainlint.sed b/t/chainlint.sed
index afb2443a9c..6661e21f20 100644
--- a/t/chainlint.sed
+++ b/t/chainlint.sed
@@ -157,6 +157,7 @@ s/.*\n//
/^[^']*'[^']*$/{
/"[^'"]*'[^'"]*"/!bsqstring
}
+:folded
# here-doc -- swallow it
/<<[ ]*[-\\']*[A-Za-z0-9_]/bheredoc
# comment or empty line -- discard since final non-comment, non-empty line
@@ -255,7 +256,7 @@ s/"//g
N
s/\n//
/"/!bdqstring
-bcheckchain
+bfolded
# found multi-line single-quoted string '...\n...' -- slurp until end of string
:sqstring
@@ -263,7 +264,7 @@ s/'//g
N
s/\n//
/'/!bsqstring
-bcheckchain
+bfolded
# found here-doc -- swallow it to avoid false hits within its body (but keep
# the command to which it was attached)
@@ -278,7 +279,7 @@ N
}
s/^<[^>]*>//
s/\n.*$//
-bcheckchain
+bfolded
# found "case ... in" -- pass through untouched
:case
diff --git a/t/chainlint/here-doc-close-subshell.expect b/t/chainlint/here-doc-close-subshell.expect
new file mode 100644
index 0000000000..f011e335e5
--- /dev/null
+++ b/t/chainlint/here-doc-close-subshell.expect
@@ -0,0 +1,2 @@
+(
+> cat)
diff --git a/t/chainlint/here-doc-close-subshell.test b/t/chainlint/here-doc-close-subshell.test
new file mode 100644
index 0000000000..b857ff5467
--- /dev/null
+++ b/t/chainlint/here-doc-close-subshell.test
@@ -0,0 +1,5 @@
+(
+# LINT: line contains here-doc and closes nested subshell
+ cat <<-\INPUT)
+ fizz
+ INPUT
diff --git a/t/chainlint/here-doc-multi-line-command-subst.expect b/t/chainlint/here-doc-multi-line-command-subst.expect
new file mode 100644
index 0000000000..e5fb752d2f
--- /dev/null
+++ b/t/chainlint/here-doc-multi-line-command-subst.expect
@@ -0,0 +1,5 @@
+(
+ x=$(bobble &&
+?!AMP?!>> wiffle)
+ echo $x
+>)
diff --git a/t/chainlint/here-doc-multi-line-command-subst.test b/t/chainlint/here-doc-multi-line-command-subst.test
new file mode 100644
index 0000000000..899bc5de8b
--- /dev/null
+++ b/t/chainlint/here-doc-multi-line-command-subst.test
@@ -0,0 +1,9 @@
+(
+# LINT: line contains here-doc and opens multi-line $(...)
+ x=$(bobble <<-\END &&
+ fossil
+ vegetable
+ END
+ wiffle)
+ echo $x
+)
diff --git a/t/chainlint/here-doc-multi-line-string.expect b/t/chainlint/here-doc-multi-line-string.expect
new file mode 100644
index 0000000000..1e5b724b9d
--- /dev/null
+++ b/t/chainlint/here-doc-multi-line-string.expect
@@ -0,0 +1,4 @@
+(
+?!AMP?! cat && echo multi-line string"
+ bap
+>)
diff --git a/t/chainlint/here-doc-multi-line-string.test b/t/chainlint/here-doc-multi-line-string.test
new file mode 100644
index 0000000000..a53edbcc8d
--- /dev/null
+++ b/t/chainlint/here-doc-multi-line-string.test
@@ -0,0 +1,8 @@
+(
+# LINT: line contains here-doc and opens multi-line string
+ cat <<-\TXT && echo "multi-line
+ string"
+ fizzle
+ TXT
+ bap
+)
--
2.18.0.267.gbc8be36ecb
