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when no target is specified, show an extra warning and just build an index.

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with this, you can use rembackup on the `target` server to generate a new index if,
for some reason, your local index gets messed up and has to be regenerated
This commit is contained in:
Mark 2023-10-05 15:57:36 +02:00
parent f4cd0851dd
commit 5e03e584db
3 changed files with 64 additions and 22 deletions
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78
src/apply_indexchanges.rs
View File

@ -1,4 +1,7 @@
use std::{fs, io, path::Path};
use std::{
fs, io,
path::{Path, PathBuf},
};
use crate::{indexchanges::IndexChange, repr_file::ReprFile};
@ -8,7 +11,7 @@ use crate::{indexchanges::IndexChange, repr_file::ReprFile};
pub fn apply_indexchanges(
source: &Path,
index: &Path,
target: &Path,
target: &Option<PathBuf>,
changes: &Vec<IndexChange>,
) -> io::Result<()> {
let o = apply_indexchanges_int(source, index, target, changes);
@ -18,7 +21,7 @@ pub fn apply_indexchanges(
pub fn apply_indexchanges_int(
source: &Path,
index: &Path,
target: &Path,
target: &Option<PathBuf>,
changes: &Vec<IndexChange>,
) -> io::Result<()> {
let len_width = changes.len().to_string().len();
@ -32,42 +35,75 @@ pub fn apply_indexchanges_int(
for (i, change) in changes.iter().enumerate() {
match change {
IndexChange::AddDir(dir) => {
let t = target.join(dir);
if let Some(e) = fs::create_dir(&t).err().and_then(|e| {
if matches!(e.kind(), io::ErrorKind::AlreadyExists) {
None
let ok = if let Some(target) = target {
let t = target.join(dir);
if let Some(e) = fs::create_dir(&t).err().and_then(|e| {
if matches!(e.kind(), io::ErrorKind::AlreadyExists) {
None
} else {
Some(e)
}
}) {
eprintln!("\n[warn] couldn't create directory {t:?}: {e}");
false
} else {
Some(e)
true
}
}) {
eprintln!("\n[warn] couldn't create directory {t:?}: {e}");
} else {
true
};
if ok {
fs::create_dir(&index.join(dir))?;
}
}
IndexChange::AddFile(file, index_file) => {
let s = source.join(file);
let t = target.join(file);
if let Err(e) = fs::copy(&s, &t) {
eprintln!("\n[warn] couldn't copy file from {s:?} to {t:?}: {e}");
let ok = if let Some(target) = target {
let s = source.join(file);
let t = target.join(file);
if let Err(e) = fs::copy(&s, &t) {
eprintln!("\n[warn] couldn't copy file from {s:?} to {t:?}: {e}");
false
} else {
true
}
} else {
true
};
if ok {
fs::write(&index.join(file), index_file.save())?;
}
fs::write(&index.join(file), index_file.save())?;
}
IndexChange::RemoveFile(file) => {
let i = index.join(file);
let t = target.join(file);
if let Err(e) = fs::remove_file(&t) {
eprintln!("\n[warn] couldn't remove file {t:?}, keeping index file {i:?}: {e:?}\n If this error keeps appearing, check if the file was deleted on the target system but still exists in the index. if yes, consider manually deleting it.");
let ok = if let Some(target) = target {
let t = target.join(file);
if let Err(e) = fs::remove_file(&t) {
eprintln!("\n[warn] couldn't remove file {t:?}, keeping index file {i:?}: {e:?}\n If this error keeps appearing, check if the file was deleted on the target system but still exists in the index. if yes, consider manually deleting it.");
false
} else {
true
}
} else {
true
};
if ok {
fs::remove_file(i)?;
}
}
IndexChange::RemoveDir(dir) => {
let i = index.join(dir);
let t = target.join(dir);
if let Err(e) = fs::remove_dir_all(&t) {
eprintln!("\n[warn] couldn't remove directory {t:?}, keeping index files under {i:?}: {e:?}\n If this error keeps appearing, check if the directory was deleted on the target system but still exists in the index. if yes, consider manually deleting it.");
let ok = if let Some(target) = target {
let t = target.join(dir);
if let Err(e) = fs::remove_dir_all(&t) {
eprintln!("\n[warn] couldn't remove directory {t:?}, keeping index files under {i:?}: {e:?}\n If this error keeps appearing, check if the directory was deleted on the target system but still exists in the index. if yes, consider manually deleting it.");
false
} else {
true
}
} else {
true
};
if ok {
fs::remove_dir_all(i)?;
}
}

5
src/args.rs
View File

@ -5,10 +5,13 @@ use clap::Parser;
#[derive(Parser)]
#[command(author, version)]
pub struct Args {
/// the data to be backed up
#[arg()]
pub source: PathBuf,
/// the index used to determine which files have been modified
#[arg()]
pub index: PathBuf,
/// where your backup will be stored
#[arg()]
pub target: PathBuf,
pub target: Option<PathBuf>,
}

3
src/main.rs
View File

@ -45,6 +45,9 @@ fn main() {
eprintln!(" - remove file");
eprintln!(" [-] remove directory (and all contents!)");
eprintln!("Press Enter to to apply these actions.");
if args.target.is_none() {
eprintln!("[WARN] You didn't set a `target` directory!\n[WARN] Be careful not to update your index without actually applying the changes to the `target` filesystem!");
}
// apply changes
if std::io::stdin().read_line(&mut String::new()).is_ok() {
match apply_indexchanges(&args.source, &args.index, &args.target, &changes) {