cargo tree is a Cargo subcommand that visualizes a crate's dependency graph
in a tree-like format.
Install it with Cargo:
$ cargo install cargo-tree
In its default mode, cargo tree will print the "normal" dependencies of the
local crate:
$ cargo tree
postgres v0.10.2 (file:///Volumes/git/rust/rust-postgres)
├── bufstream v0.1.1
├── byteorder v0.4.2
├── hex v0.1.0
├── log v0.3.4
│ └── libc v0.2.2
├── net2 v0.2.19
│ ├── cfg-if v0.1.0
│ ├── kernel32-sys v0.2.1
│ │ └── winapi v0.2.5
│ ├── libc v0.2.2 (*)
│ ├── winapi v0.2.5 (*)
│ └── ws2_32-sys v0.2.1
│ └── winapi v0.2.5 (*)
└── phf v0.7.9
└── phf_shared v0.7.9
Crates will only have their dependencies displayed the first time they are
shown - further copies will have a (*) appended to indicate that their output
has been truncated.
Like other cargo subcommands, features can be enabled via the --features
flag:
$ cargo tree --features serde_json
postgres v0.10.2 (file:///Volumes/git/rust/rust-postgres)
├── bufstream v0.1.1
├── byteorder v0.4.2
├── hex v0.1.0
├── log v0.3.4
│ └── libc v0.2.2
├── net2 v0.2.19
│ ├── cfg-if v0.1.0
│ ├── kernel32-sys v0.2.1
│ │ └── winapi v0.2.5
│ ├── libc v0.2.2 (*)
│ ├── winapi v0.2.5 (*)
│ └── ws2_32-sys v0.2.1
│ └── winapi v0.2.5 (*)
├── phf v0.7.9
│ └── phf_shared v0.7.9
└── serde_json v0.6.0
├── num v0.1.28
│ ├── rand v0.3.12
│ │ ├── advapi32-sys v0.1.2
│ │ │ └── winapi v0.2.5 (*)
│ │ ├── libc v0.2.2 (*)
│ │ └── winapi v0.2.5 (*)
│ └── rustc-serialize v0.3.16
└── serde v0.6.1
└── num v0.1.28 (*)
Output can be switched to development or build dependencies with the --kind
or -k flag:
cargo tree -k build
postgres v0.10.2 (file:///Volumes/git/rust/rust-postgres)
└── phf_codegen v0.7.9
├── phf_generator v0.7.9
│ ├── phf_shared v0.7.9
│ └── rand v0.3.12
│ ├── advapi32-sys v0.1.2
│ │ └── winapi v0.2.5
│ ├── libc v0.2.2
│ └── winapi v0.2.5 (*)
└── phf_shared v0.7.9 (*)
cargo tree can also operate in an "inverse" mode where the dependency tree is
walked backwards. This is most often useful when trying to determine where
a certain crate is coming from. The --package or -p flag selects the crate
to use as the root of the tree and the --invert or -i flag inverts the
dependency graph traversal:
cargo tree --features serde_json -p libc -i
libc v0.2.2
├── log v0.3.4
│ └── postgres v0.10.2 (file:///Volumes/git/rust/rust-postgres)
├── net2 v0.2.19
│ └── postgres v0.10.2 (file:///Volumes/git/rust/rust-postgres) (*)
└── rand v0.3.12
└── num v0.1.28
├── serde v0.6.1
│ └── serde_json v0.6.0
│ └── postgres v0.10.2 (file:///Volumes/git/rust/rust-postgres) (*)
└── serde_json v0.6.0 (*)
More options are available - see the output of cargo tree --help for details.