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codeql/python/ql/src/analysis/AlertSuppression.ql at codeql-cli-2.11.3 · github/codeql · GitHub
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ql
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AlertSuppression.ql
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codeql
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ql
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src
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analysis
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AlertSuppression.ql
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/**
* @name Alert suppression
* @description Generates information about alert suppressions.
* @kind alert-suppression
* @id py/alert-suppression
*/
import
python
/**
* An alert suppression comment.
*/
abstract
class
SuppressionComment
extends
Comment
{
/** Gets the scope of this suppression. */
abstract
SuppressionScope
getScope
(
)
;
/** Gets the suppression annotation in this comment. */
abstract
string
getAnnotation
(
)
;
/**
* Holds if this comment applies to the range from column `startcolumn` of line `startline`
* to column `endcolumn` of line `endline` in file `filepath`.
*/
abstract
predicate
covers
(
string
filepath
,
int
startline
,
int
startcolumn
,
int
endline
,
int
endcolumn
)
;
}
/**
* An alert comment that applies to a single line
*/
abstract
class
LineSuppressionComment
extends
SuppressionComment
{
LineSuppressionComment
(
)
{
exists
(
string
filepath
,
int
l
|
this
.
getLocation
(
)
.
hasLocationInfo
(
filepath
,
l
,
_
,
_
,
_
)
and
any
(
AstNode
a
)
.
getLocation
(
)
.
hasLocationInfo
(
filepath
,
l
,
_
,
_
,
_
)
)
}
/** Gets the scope of this suppression. */
override
SuppressionScope
getScope
(
)
{
result
=
this
}
override
predicate
covers
(
string
filepath
,
int
startline
,
int
startcolumn
,
int
endline
,
int
endcolumn
)
{
this
.
getLocation
(
)
.
hasLocationInfo
(
filepath
,
startline
,
_
,
endline
,
endcolumn
)
and
startcolumn
=
1
}
}
/**
* An lgtm suppression comment.
*/
class
LgtmSuppressionComment
extends
LineSuppressionComment
{
string
annotation
;
LgtmSuppressionComment
(
)
{
exists
(
string
all
|
all
=
this
.
getContents
(
)
|
// match `lgtm[...]` anywhere in the comment
annotation
=
all
.
regexpFind
(
"(?i)\\blgtm\\s*\\[[^\\]]*\\]"
,
_
,
_
)
or
// match `lgtm` at the start of the comment and after semicolon
annotation
=
all
.
regexpFind
(
"(?i)(?<=^|;)\\s*lgtm(?!\\B|\\s*\\[)"
,
_
,
_
)
.
trim
(
)
)
}
/** Gets the suppression annotation in this comment. */
override
string
getAnnotation
(
)
{
result
=
annotation
}
}
/**
* A noqa suppression comment. Both pylint and pyflakes respect this, so lgtm ought to too.
*/
class
NoqaSuppressionComment
extends
LineSuppressionComment
{
NoqaSuppressionComment
(
)
{
this
.
getContents
(
)
.
toLowerCase
(
)
.
regexpMatch
(
"\\s*noqa\\s*([^:].*)?"
)
}
override
string
getAnnotation
(
)
{
result
=
"lgtm"
}
}
/**
* The scope of an alert suppression comment.
*/
class
SuppressionScope
extends
@py_comment
{
SuppressionScope
(
)
{
this
instanceof
SuppressionComment
}
/**
* Holds if this element is at the specified location.
* The location spans column `startcolumn` of line `startline` to
* column `endcolumn` of line `endline` in file `filepath`.
* For more information, see
* [Locations](https://codeql.github.com/docs/writing-codeql-queries/providing-locations-in-codeql-queries/).
*/
predicate
hasLocationInfo
(
string
filepath
,
int
startline
,
int
startcolumn
,
int
endline
,
int
endcolumn
)
{
this
.
(
SuppressionComment
)
.
covers
(
filepath
,
startline
,
startcolumn
,
endline
,
endcolumn
)
}
/** Gets a textual representation of this element. */
string
toString
(
)
{
result
=
"suppression range"
}
}
from
SuppressionComment
c
select
c
,
// suppression comment
c
.
getContents
(
)
,
// text of suppression comment (excluding delimiters)
c
.
getAnnotation
(
)
,
// text of suppression annotation
c
.
getScope
(
)
// scope of suppression
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