The init command

cargo-deny's configuration is a little bit complicated, so we provide the init command to create a configuration file from a template for you to give you a starting point for configuring how you want cargo-deny to lint your project.

The init command is used like this:

cargo deny init

Specify a path

The init command can take a path as an argument to use as path of the config instead of the default which is <cwd>/deny.toml.

cargo deny init path/to/config.toml


A deny.toml file will be created in the current working directory that is a direct copy of this template.

# This template contains all of the possible sections and their default values

# Note that all fields that take a lint level have these possible values:
# * deny - An error will be produced and the check will fail
# * warn - A warning will be produced, but the check will not fail
# * allow - No warning or error will be produced, though in some cases a note
# will be

# The values provided in this template are the default values that will be used
# when any section or field is not specified in your own configuration

# Root options

# The graph table configures how the dependency graph is constructed and thus
# which crates the checks are performed against
# If 1 or more target triples (and optionally, target_features) are specified,
# only the specified targets will be checked when running `cargo deny check`.
# This means, if a particular package is only ever used as a target specific
# dependency, such as, for example, the `nix` crate only being used via the
# `target_family = "unix"` configuration, that only having windows targets in
# this list would mean the nix crate, as well as any of its exclusive
# dependencies not shared by any other crates, would be ignored, as the target
# list here is effectively saying which targets you are building for.
targets = [
    # The triple can be any string, but only the target triples built in to
    # rustc (as of 1.40) can be checked against actual config expressions
    # You can also specify which target_features you promise are enabled for a
    # particular target. target_features are currently not validated against
    # the actual valid features supported by the target architecture.
    #{ triple = "wasm32-unknown-unknown", features = ["atomics"] },
# When creating the dependency graph used as the source of truth when checks are
# executed, this field can be used to prune crates from the graph, removing them
# from the view of cargo-deny. This is an extremely heavy hammer, as if a crate
# is pruned from the graph, all of its dependencies will also be pruned unless
# they are connected to another crate in the graph that hasn't been pruned,
# so it should be used with care. The identifiers are [Package ID Specifications]
# (
#exclude = []
# If true, metadata will be collected with `--all-features`. Note that this can't
# be toggled off if true, if you want to conditionally enable `--all-features` it
# is recommended to pass `--all-features` on the cmd line instead
all-features = false
# If true, metadata will be collected with `--no-default-features`. The same
# caveat with `all-features` applies
no-default-features = false
# If set, these feature will be enabled when collecting metadata. If `--features`
# is specified on the cmd line they will take precedence over this option.
#features = []

# The output table provides options for how/if diagnostics are outputted
# When outputting inclusion graphs in diagnostics that include features, this
# option can be used to specify the depth at which feature edges will be added.
# This option is included since the graphs can be quite large and the addition
# of features from the crate(s) to all of the graph roots can be far too verbose.
# This option can be overridden via `--feature-depth` on the cmd line
feature-depth = 1

# This section is considered when running `cargo deny check advisories`
# More documentation for the advisories section can be found here:
# The path where the advisory databases are cloned/fetched into
#db-path = "$CARGO_HOME/advisory-dbs"
# The url(s) of the advisory databases to use
#db-urls = [""]
# A list of advisory IDs to ignore. Note that ignored advisories will still
# output a note when they are encountered.
ignore = [
    #{ id = "RUSTSEC-0000-0000", reason = "you can specify a reason the advisory is ignored" },
    #"a-crate-that-is-yanked@0.1.1", # you can also ignore yanked crate versions if you wish
    #{ crate = "a-crate-that-is-yanked@0.1.1", reason = "you can specify why you are ignoring the yanked crate" },
# If this is true, then cargo deny will use the git executable to fetch advisory database.
# If this is false, then it uses a built-in git library.
# Setting this to true can be helpful if you have special authentication requirements that cargo-deny does not support.
# See Git Authentication for more information about setting up git authentication.
#git-fetch-with-cli = true

# This section is considered when running `cargo deny check licenses`
# More documentation for the licenses section can be found here:
# List of explicitly allowed licenses
# See for list of possible licenses
# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
allow = [
    #"Apache-2.0 WITH LLVM-exception",
# The confidence threshold for detecting a license from license text.
# The higher the value, the more closely the license text must be to the
# canonical license text of a valid SPDX license file.
# [possible values: any between 0.0 and 1.0].
confidence-threshold = 0.8
# Allow 1 or more licenses on a per-crate basis, so that particular licenses
# aren't accepted for every possible crate as with the normal allow list
exceptions = [
    # Each entry is the crate and version constraint, and its specific allow
    # list
    #{ allow = ["Zlib"], crate = "adler32" },

# Some crates don't have (easily) machine readable licensing information,
# adding a clarification entry for it allows you to manually specify the
# licensing information
# The package spec the clarification applies to
#crate = "ring"
# The SPDX expression for the license requirements of the crate
#expression = "MIT AND ISC AND OpenSSL"
# One or more files in the crate's source used as the "source of truth" for
# the license expression. If the contents match, the clarification will be used
# when running the license check, otherwise the clarification will be ignored
# and the crate will be checked normally, which may produce warnings or errors
# depending on the rest of your configuration
#license-files = [
# Each entry is a crate relative path, and the (opaque) hash of its contents
#{ path = "LICENSE", hash = 0xbd0eed23 }

# If true, ignores workspace crates that aren't published, or are only
# published to private registries.
# To see how to mark a crate as unpublished (to the official registry),
# visit
ignore = false
# One or more private registries that you might publish crates to, if a crate
# is only published to private registries, and ignore is true, the crate will
# not have its license(s) checked
registries = [

# This section is considered when running `cargo deny check bans`.
# More documentation about the 'bans' section can be found here:
# Lint level for when multiple versions of the same crate are detected
multiple-versions = "warn"
# Lint level for when a crate version requirement is `*`
wildcards = "allow"
# The graph highlighting used when creating dotgraphs for crates
# with multiple versions
# * lowest-version - The path to the lowest versioned duplicate is highlighted
# * simplest-path - The path to the version with the fewest edges is highlighted
# * all - Both lowest-version and simplest-path are used
highlight = "all"
# The default lint level for `default` features for crates that are members of
# the workspace that is being checked. This can be overridden by allowing/denying
# `default` on a crate-by-crate basis if desired.
workspace-default-features = "allow"
# The default lint level for `default` features for external crates that are not
# members of the workspace. This can be overridden by allowing/denying `default`
# on a crate-by-crate basis if desired.
external-default-features = "allow"
# List of crates that are allowed. Use with care!
allow = [
    #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason it is allowed" },
# List of crates to deny
deny = [
    #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason it is banned" },
    # Wrapper crates can optionally be specified to allow the crate when it
    # is a direct dependency of the otherwise banned crate
    #{ crate = "ansi_term@0.11.0", wrappers = ["this-crate-directly-depends-on-ansi_term"] },

# List of features to allow/deny
# Each entry the name of a crate and a version range. If version is
# not specified, all versions will be matched.
#crate = "reqwest"
# Features to not allow
#deny = ["json"]
# Features to allow
#allow = [
#    "rustls",
#    "__rustls",
#    "__tls",
#    "hyper-rustls",
#    "rustls",
#    "rustls-pemfile",
#    "rustls-tls-webpki-roots",
#    "tokio-rustls",
#    "webpki-roots",
# If true, the allowed features must exactly match the enabled feature set. If
# this is set there is no point setting `deny`
#exact = true

# Certain crates/versions that will be skipped when doing duplicate detection.
skip = [
    #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason why it can't be updated/removed" },
# Similarly to `skip` allows you to skip certain crates during duplicate
# detection. Unlike skip, it also includes the entire tree of transitive
# dependencies starting at the specified crate, up to a certain depth, which is
# by default infinite.
skip-tree = [
    #"ansi_term@0.11.0", # will be skipped along with _all_ of its direct and transitive dependencies
    #{ crate = "ansi_term@0.11.0", depth = 20 },

# This section is considered when running `cargo deny check sources`.
# More documentation about the 'sources' section can be found here:
# Lint level for what to happen when a crate from a crate registry that is not
# in the allow list is encountered
unknown-registry = "warn"
# Lint level for what to happen when a crate from a git repository that is not
# in the allow list is encountered
unknown-git = "warn"
# List of URLs for allowed crate registries. Defaults to the index
# if not specified. If it is specified but empty, no registries are allowed.
allow-registry = [""]
# List of URLs for allowed Git repositories
allow-git = []

# 1 or more organizations to allow git sources for
github = [""]
# 1 or more organizations to allow git sources for
gitlab = [""]
# 1 or more organizations to allow git sources for
bitbucket = [""]