jscpd
JSCPD browses all files of your repository to detect excessive copy-pastes
If you need to ignore folders, files or file extensions, use glob expressions ignore
property of local .jscpd.json
file
Example:
{
"threshold": 0,
"reporters": ["html", "markdown"],
"ignore": [
"**/node_modules/**",
"**/.git/**",
"**/*.md",
"**/myFolderToSkip/**"
]
}
jscpd documentation
- Version in MegaLinter: 4.0.5
- Visit Official Web Site
- See How to configure jscpd rules
- If custom
.jscpd.json
config file isn't found, .jscpd.json will be used
- If custom
- See How to disable jscpd rules in files
Configuration in MegaLinter
- Enable jscpd by adding
COPYPASTE_JSCPD
in ENABLE_LINTERS variable - Disable jscpd by adding
COPYPASTE_JSCPD
in DISABLE_LINTERS variable
Variable | Description | Default value |
---|---|---|
COPYPASTE_JSCPD_ARGUMENTS | User custom arguments to add in linter CLI call Ex: -s --foo "bar" |
|
COPYPASTE_JSCPD_COMMAND_REMOVE_ARGUMENTS | User custom arguments to remove from command line before calling the linter Ex: -s --foo "bar" |
|
COPYPASTE_JSCPD_CLI_LINT_MODE | Override default CLI lint mode ⚠️ As default value is project, overriding might not work - file : Calls the linter for each file- list_of_files : Call the linter with the list of files as argument- project : Call the linter from the root of the project |
project |
COPYPASTE_JSCPD_PRE_COMMANDS | List of bash commands to run before the linter | None |
COPYPASTE_JSCPD_POST_COMMANDS | List of bash commands to run after the linter | None |
COPYPASTE_JSCPD_UNSECURED_ENV_VARIABLES | List of env variables explicitly not filtered before calling COPYPASTE_JSCPD and its pre/post commands | None |
COPYPASTE_JSCPD_CONFIG_FILE | jscpd configuration file nameUse LINTER_DEFAULT to let the linter find it |
.jscpd.json |
COPYPASTE_JSCPD_RULES_PATH | Path where to find linter configuration file | Workspace folder, then MegaLinter default rules |
COPYPASTE_JSCPD_DISABLE_ERRORS | Run linter but consider errors as warnings | false |
COPYPASTE_JSCPD_DISABLE_ERRORS_IF_LESS_THAN | Maximum number of errors allowed | 0 |
COPYPASTE_JSCPD_CLI_EXECUTABLE | Override CLI executable | ['jscpd'] |
MegaLinter Flavors
This linter is available in the following flavors
Flavor | Description | Embedded linters | Info | |
---|---|---|---|---|
all | Default MegaLinter Flavor | 124 | ||
c_cpp | Optimized for pure C/C++ projects | 54 | ||
ci_light | Optimized for CI items (Dockerfile, Jenkinsfile, JSON/YAML schemas,XML | 21 | ||
cupcake | MegaLinter for the most commonly used languages | 83 | ||
documentation | MegaLinter for documentation projects | 49 | ||
dotnet | Optimized for C, C++, C# or VB based projects | 62 | ||
dotnetweb | Optimized for C, C++, C# or VB based projects with JS/TS | 71 | ||
go | Optimized for GO based projects | 51 | ||
java | Optimized for JAVA based projects | 52 | ||
javascript | Optimized for JAVASCRIPT or TYPESCRIPT based projects | 59 | ||
php | Optimized for PHP based projects | 54 | ||
python | Optimized for PYTHON based projects | 62 | ||
ruby | Optimized for RUBY based projects | 50 | ||
rust | Optimized for RUST based projects | 50 | ||
salesforce | Optimized for Salesforce based projects | 54 | ||
swift | Optimized for SWIFT based projects | 50 | ||
terraform | Optimized for TERRAFORM based projects | 54 |
Behind the scenes
How are identified applicable files
- If this linter is active, all files will always be linted
How the linting is performed
jscpd is called once on the whole project directory (project
CLI lint mode)
- filtering can not be done using MegaLinter configuration variables,it must be done using jscpd configuration or ignore file (if existing)
VALIDATE_ALL_CODEBASE: false
doesn't make jscpd analyze only updated files
Example calls
jscpd --output ./report/copy-paste/ .
jscpd --output ./report/copy-paste/ -c .jscpd.json .
Help content
Usage: jscpd [options] <path ...>
detector of copy/paste in files
Options:
-V, --version output the version number
-l, --min-lines [number] min size of duplication in code lines (Default is
5)
-k, --min-tokens [number] min size of duplication in code tokens (Default is
50)
-x, --max-lines [number] max size of source in lines (Default is 1000)
-z, --max-size [string] max size of source in bytes, examples: 1kb, 1mb,
120kb (Default is 100kb)
-t, --threshold [number] threshold for duplication, in case duplications >=
threshold jscpd will exit with error
-c, --config [string] path to config file (Default is .jscpd.json in
<path>)
-i, --ignore [string] glob pattern for files what should be excluded
from duplication detection
--ignore-pattern [string] Ignore code blocks matching the regexp patterns
-r, --reporters [string] reporters or list of reporters separated with
comma to use (Default is time,console)
-o, --output [string] reporters to use (Default is ./report/)
-m, --mode [string] mode of quality of search, can be "strict", "mild" and "weak" (Default is "function mild(token) {
return strict(token) && token.type !== "empty" && token.type !== "new_line";
}")
-f, --format [string] format or formats separated by comma (Example
php,javascript,python)
-p, --pattern [string] glob pattern to file search (Example **/*.txt)
-b, --blame blame authors of duplications (get information
about authors from git)
-s, --silent do not write detection progress and result to a
console
--store [string] use for define custom store (e.g. --store leveldb
used for big codebase)
-a, --absolute use absolute path in reports
-n, --noSymlinks dont use symlinks for detection in files
--ignoreCase ignore case of symbols in code (experimental)
-g, --gitignore ignore all files from .gitignore file
--formats-exts [string] list of formats with file extensions
(javascript:es,es6;dart:dt)
-d, --debug show debug information, not run detection
process(options list and selected files)
-v, --verbose show full information during detection process
--list show list of total supported formats
--skipLocal skip duplicates in local folders, just detect
cross folders duplications
--exitCode [number] exit code to use when code duplications are
detected
-h, --help display help for command