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doc: RFC: husht command line and top-level behavior #1

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README.md
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@ -33,24 +33,19 @@ is a list of files, directories or glob patterns, defaulting to `.`. A
directory `dir` is interpreted the same way as the glob pattern `dir/**` -- directory `dir` is interpreted the same way as the glob pattern `dir/**` --
in other words, all files recursively within that directory. Glob patterns in other words, all files recursively within that directory. Glob patterns
are matched and all matching files are added to the list of files to process. are matched and all matching files are added to the list of files to process.
If there is a destination directory (see below), all files in the destination All files in the output directory are ignored. Files that do not have
directory are ignored. Files that do not have extension `.toml` or `.hsh` are extension `.toml` or `.hsh` are ignored. The former are copied unchanged;
ignored. The former are copied unchanged; the latter are transformed per the the latter are transformed per the husht language specification into
husht language specification into Rust `.rs` files. Rust `.rs` files.
Options: Options:
- -h, --help -- Print a usage summary and exit - -h, --help -- Print a usage summary and exit
- -o, --destination [dir/file] -- Specifies the destination of the - --out-dir [dir] -- Specifies the output directory of the transformed
transformed file(s). If the destination is a single file, the sources must file(s), defaulting to `rust`. The transform of each source file is
be as well, and the one file is transformed into the other. A destination written into the output directory, preserving its relative path to its
specification without an extension is assumed to be a directory. The "root". The root of a file added by virtue of a glob is the top level
default destination is `rust`. directory of that glob pattern, or the current directory if none.
The root of a file specified explicitly is the current directory.
If the destination is a directory, then the transform of each source file
is written into that directory, preserving its relative path to its "root".
The root of a file added by virtue of a glob is the top level directory
of that glob pattern. The root of a file specified explicitly is the
current directory.
For example, if the `src` directory contains `main.hsh`, `sub/crate.hsh`, and For example, if the `src` directory contains `main.hsh`, `sub/crate.hsh`, and
`Cargo.toml` (and there are no other .hsh or .toml files in the directory `Cargo.toml` (and there are no other .hsh or .toml files in the directory