Struct Args 

struct Args {

    from_file: bool,
    print_digest: bool,
    print_digest_only: bool,
    use_epoch: bool,
    skip_devices: bool,
    skip_xattrs: bool,
    user_xattrs: bool,
    min_version: u32,
    max_version: u32,
    digest_store: Option<PathBuf>,
    hardlinks: bool,
    threads: Option<usize>,
    source: PathBuf,
    image: Option<PathBuf>,
}

Create a composefs image from a source directory or dumpfile.

Composefs uses EROFS image files for metadata and separate content-addressed backing directories for regular file data.

Fields

from_file: bool

Treat SOURCE as a dumpfile in composefs-dump(5) format.

If SOURCE is -, reads from stdin.

print_digest: bool

Print the fsverity digest of the image after writing.

print_digest_only: bool

Print the fsverity digest without writing the image.

When set, IMAGE must be omitted.

use_epoch: bool

Set modification time to zero (Unix epoch) for all files.

skip_devices: bool

Exclude device nodes from the image.

skip_xattrs: bool

Exclude all extended attributes.

user_xattrs: bool

Only include xattrs with the user. prefix.

min_version: u32

Minimum image format version to use (0 or 1).

max_version: u32

Maximum image format version (for auto-upgrade).

digest_store: Option<PathBuf>

Copy regular file content to the given object store directory.

Files are stored by their fsverity digest using the same flat layout as C mkcomposefs: XX/DIGEST where XX is the first byte of the digest. The directory is created if it doesn’t exist. The layout is compatible with digest stores written by the C mkcomposefs tool.

hardlinks: bool

Deduplicate hard-linked files on the source filesystem into shared EROFS inodes. Without this flag the output is bit-for-bit compatible with the C mkcomposefs tool.

threads: Option<usize>

Number of threads to use for digest calculation and file copying.

source: PathBuf

The source directory or dumpfile.

image: Option<PathBuf>

The output image path (use - for stdout).

Must be omitted when using –print-digest-only.

Trait Implementations

impl Args for Args

fn group_id() -> Option<Id>

Report the [ArgGroup::id][crate::ArgGroup::id] for this set of arguments

fn augment_args<'b>(__clap_app: Command) -> Command

Append to [Command] so it can instantiate Self via [FromArgMatches::from_arg_matches_mut]

fn augment_args_for_update<'b>(__clap_app: Command) -> Command

Append to [Command] so it can instantiate self via [FromArgMatches::update_from_arg_matches_mut]

impl CommandFactory for Args

fn command<'b>() -> Command

Build a [Command] that can instantiate Self.

fn command_for_update<'b>() -> Command

Build a [Command] that can update self.

impl Debug for Args

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromArgMatches for Args

fn from_arg_matches(__clap_arg_matches: &ArgMatches) -> Result<Self, Error>

Instantiate Self from [ArgMatches], parsing the arguments as needed.

fn from_arg_matches_mut( __clap_arg_matches: &mut ArgMatches, ) -> Result<Self, Error>

Instantiate Self from [ArgMatches], parsing the arguments as needed.

fn update_from_arg_matches( &mut self, __clap_arg_matches: &ArgMatches, ) -> Result<(), Error>

Assign values from ArgMatches to self.

fn update_from_arg_matches_mut( &mut self, __clap_arg_matches: &mut ArgMatches, ) -> Result<(), Error>

Assign values from ArgMatches to self.

impl Parser for Args

fn parse() -> Self

Parse from std::env::args_os(), [exit][Error::exit] on error.

fn try_parse() -> Result<Self, Error>

Parse from std::env::args_os(), return Err on error.

fn parse_from<I, T>(itr: I) -> Self

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Parse from iterator, [exit][Error::exit] on error.

fn try_parse_from<I, T>(itr: I) -> Result<Self, Error>

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Parse from iterator, return Err on error.

fn update_from<I, T>(&mut self, itr: I)

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Update from iterator, [exit][Error::exit] on error.

fn try_update_from<I, T>(&mut self, itr: I) -> Result<(), Error>

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Update from iterator, return Err on error.