Everywhere: Initial working version

This commit is contained in:
networkException 2023-11-09 22:57:08 +01:00
parent 95b3f8b928
commit d1f1c0bf74
Signed by: networkException
GPG key ID: E3877443AE684391
3 changed files with 634 additions and 2 deletions

452
Cargo.lock generated
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@ -2,6 +2,458 @@
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@ -6,3 +6,8 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies] [dependencies]
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log = "0.4.20"
rand = "0.8.5"

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@ -1,3 +1,178 @@
fn main() { use std::fmt::{self, Formatter, Display};
println!("Hello, world!"); use std::fs;
use std::io;
use std::process;
use std::iter;
use rand::rngs::ThreadRng;
use rand::{thread_rng, Rng};
use clap::{Parser, ValueEnum};
#[derive(Debug, Clone, ValueEnum)]
enum CharacterSet {
Alphabetic,
Alphanumeric,
Hexadecimal,
Decimal,
Base64,
}
impl CharacterSet {
fn charset(&self) -> Vec<char> {
match self {
Self::Alphabetic => ('A'..='Z').chain('a'..='z').collect(),
Self::Alphanumeric => ('0'..='9').chain('A'..='Z').chain('a'..='z').collect(),
Self::Hexadecimal => ('0'..='9').chain('a'..='f').collect(),
Self::Decimal => ('0'..='9').collect(),
Self::Base64 => ('0'..='9').chain('A'..='Z').chain('a'..='z').chain(vec!['+', '/', '=']).collect(),
}
}
fn non_matching_characters(&self, string: &str) -> Vec<char> {
let charset = self.charset();
string.chars().filter(|input_character| !charset.contains(input_character)).collect()
}
fn generate(&self, length: usize, rng: &mut ThreadRng) -> String {
let charset = self.charset();
iter::repeat_with(|| charset[rng.gen_range(0..charset.len())]).take(length).collect()
}
}
impl Display for CharacterSet {
fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
match self {
Self::Alphabetic => write!(formatter, "Alphabetic [A-Za-z]"),
Self::Alphanumeric => write!(formatter, "Alphanumeric [0-9A-Za-z]"),
Self::Hexadecimal => write!(formatter, "Hexadecimal [0-9a-f]"),
Self::Decimal => write!(formatter, "Decimal [0-9]"),
Self::Base64 => write!(formatter, "Base64 [0-9A-Za-z+/=]"),
}
}
}
#[derive(Debug, Clone, ValueEnum)]
enum BranchType {
Exit,
Error,
Override,
}
impl Display for BranchType {
fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
match self {
Self::Exit => write!(formatter, "Exit"),
Self::Error => write!(formatter, "Error"),
Self::Override => write!(formatter, "Override"),
}
}
}
/// Generate random strings and put them in a file
#[derive(Parser, Debug)]
#[command(author, version, about, long_about = None)]
struct Arguments {
/// An optional path write generated output to
path: Option<String>,
/// The number of characters to generate (not bytes)
#[arg(long, env)]
length: usize,
/// The character set to use when generating
#[arg(long, env)]
character_set: CharacterSet,
/// What to do when a file already exists at the given path
#[arg(long, env, default_value = "error")]
when_file_exists: BranchType,
/// What to do when the content of a file at the given path does not match the character set or length
#[arg(long, env, default_value = "error")]
when_file_content_does_not_match: BranchType,
}
fn main() -> io::Result<()> {
env_logger::init_from_env(env_logger::Env::default().filter_or(env_logger::DEFAULT_FILTER_ENV, "debug"));
let arguments = Arguments::parse();
let path = arguments.path;
let character_set = arguments.character_set;
let length = arguments.length;
let exists = if path.is_none() {
log::debug!("No file path has been provided, printing to stdout.");
false
} else {
match fs::metadata(path.clone().unwrap()) {
Ok(_) => Ok(true),
Err(error) if error.kind() == io::ErrorKind::NotFound => Ok(false),
Err(error) => Err(error),
}?
};
if exists {
match arguments.when_file_exists {
BranchType::Exit => {
log::info!("File exists, exiting.");
process::exit(0);
},
BranchType::Error => {
log::error!("File exists, exiting.");
process::exit(1);
}
BranchType::Override => (),
};
let content = fs::read_to_string(path.clone().unwrap())?;
let non_matching_characters = character_set.non_matching_characters(&content);
let content_length = content.len();
if non_matching_characters.is_empty() && content_length == length {
log::debug!("File exists, matches character set and length, exiting.");
return Ok(());
} else {
let found_non_matching = non_matching_characters.iter().take(5).collect::<String>();
let found_non_matching = escape_string::escape(found_non_matching.as_str());
let found_non_matching = if non_matching_characters.len() > 5 {
found_non_matching + "..."
} else {
found_non_matching
};
match arguments.when_file_content_does_not_match {
BranchType::Exit => {
log::info!("File exists, does not match character set (found [{}]) or length (found {}), exiting.", found_non_matching, content_length);
process::exit(0);
},
BranchType::Error => {
log::error!("File exists, does not match character set (found [{}]) or length (found {}), exiting.", found_non_matching, content_length);
process::exit(1);
},
BranchType::Override => {
log::debug!("File exists, does not match character set (found [{}]) or length (found {}).", found_non_matching, content_length);
},
};
}
}
log::debug!("Generating using {} with length {}", character_set, length);
let mut rng = thread_rng();
let generated = character_set.generate(arguments.length, &mut rng);
if let Some(path) = path {
log::debug!("Writing to {}", path);
fs::write(path, &generated)?;
} else {
println!("{}", generated);
}
Ok(())
} }