update comment

parquet/src/bin/parquet-read.rs

@@ -21,7 +21,7 @@
 //!
 //! `parquet-read` can be installed using `cargo`:
 //! ```
-//! cargo install parquet
+//! cargo install parquet --features=cli
 //! ```
 //! After this `parquet-read` should be globally available:
 //! ```
@@ -30,7 +30,7 @@
 //!
 //! The binary can also be built from the source code and run as follows:
 //! ```
-//! cargo run --bin parquet-read XYZ.parquet
+//! cargo run --features=cli --bin parquet-read XYZ.parquet
 //! ```
 //!
 //! # Usage

parquet/src/bin/parquet-rowcount.rs

@@ -21,7 +21,7 @@
 //!
 //! `parquet-rowcount` can be installed using `cargo`:
 //! ```
-//! cargo install parquet
+//! cargo install parquet --features=cli
 //! ```
 //! After this `parquet-rowcount` should be globally available:
 //! ```
@@ -30,7 +30,7 @@
 //!
 //! The binary can also be built from the source code and run as follows:
 //! ```
-//! cargo run --bin parquet-rowcount XYZ.parquet ABC.parquet ZXC.parquet
+//! cargo run --features=cli --bin parquet-rowcount XYZ.parquet ABC.parquet ZXC.parquet
 //! ```
 //!
 //! Note that `parquet-rowcount` reads full file schema, no projection or filtering is

parquet/src/bin/parquet-schema.rs

@@ -21,7 +21,7 @@
 //!
 //! `parquet-schema` can be installed using `cargo`:
 //! ```
-//! cargo install parquet
+//! cargo install parquet --features=cli
 //! ```
 //! After this `parquet-schema` should be globally available:
 //! ```
@@ -30,7 +30,7 @@
 //!
 //! The binary can also be built from the source code and run as follows:
 //! ```
-//! cargo run --bin parquet-schema XYZ.parquet
+//! cargo run --features=cli --bin parquet-schema XYZ.parquet
 //! ```
 //!
 //! Note that `verbose` is an optional boolean flag that allows to print schema only,