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imag/bin/core/imag-header/src/main.rs
Leon Schuermann ed457495c8 Introduce proper error handling in IdPathProvider 
Prior to this change, the IdPathProvider implementation would be
responsible for exiting the process on insufficient / wrong arguments.
However, such error handling should be performed together with the
business logic and not in CLI-parsing related code.

This change introduces a clear separation: both parsing errors and
insufficient id path arguments can now be return from inside the
`get_ids`-method, and get passed up to the application logic to be
handled.

This change is reflected in all instances of IdPathProvider and their
surrounding code.

Signed-off-by: Leon Schuermann <leon.git@is.currently.online>
Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
2019-05-24 21:03:34 +02:00

370 lines
12 KiB
Rust
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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2019 Matthias Beyer <mail@beyermatthias.de> and contributors
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; version
// 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
#![deny(
non_camel_case_types,
non_snake_case,
path_statements,
trivial_numeric_casts,
unstable_features,
unused_allocation,
unused_import_braces,
unused_imports,
unused_must_use,
unused_mut,
unused_qualifications,
while_true,
)]
extern crate clap;
#[macro_use] extern crate log;
extern crate toml;
extern crate toml_query;
extern crate filters;
extern crate failure;
extern crate libimagentryedit;
extern crate libimagerror;
#[macro_use] extern crate libimagrt;
extern crate libimagstore;
extern crate libimagutil;
use std::io::Write;
use std::str::FromStr;
use clap::ArgMatches;
use filters::filter::Filter;
use failure::Error;
use libimagerror::exit::ExitCode;
use libimagerror::io::ToExitCode;
use libimagerror::iter::TraceIterator;
use libimagerror::trace::MapErrTrace;
use libimagrt::runtime::Runtime;
use libimagrt::setup::generate_runtime_setup;
use libimagstore::iter::get::StoreIdGetIteratorExtension;
use libimagstore::store::FileLockEntry;
use libimagstore::storeid::StoreIdIterator;
use toml_query::read::TomlValueReadExt;
mod ui;
fn main() {
let version = make_imag_version!();
let rt = generate_runtime_setup("imag-header",
&version,
"Plumbing tool for reading/writing structured data in entries",
ui::build_ui);
let list_output_with_ids = rt.cli().is_present("list-id");
let list_output_with_ids_fmt = rt.cli().value_of("list-id-format");
trace!("list_output_with_ids = {:?}", list_output_with_ids );
trace!("list_output_with_ids_fmt = {:?}", list_output_with_ids_fmt);
let sids = rt
.ids::<crate::ui::PathProvider>()
.map_err_trace_exit_unwrap()
.unwrap_or_else(|| {
error!("No ids supplied");
::std::process::exit(1);
})
.into_iter();
let iter = StoreIdIterator::new(Box::new(sids.into_iter().map(Ok)))
.into_get_iter(rt.store())
.trace_unwrap_exit()
.filter_map(|x| x);
let exit_code = match rt.cli().subcommand() {
("read", Some(mtch)) => read(&rt, mtch, iter),
("has", Some(mtch)) => has(&rt, mtch, iter),
("hasnt", Some(mtch)) => hasnt(&rt, mtch, iter),
("int", Some(mtch)) => int(&rt, mtch, iter),
("float", Some(mtch)) => float(&rt, mtch, iter),
("string", Some(mtch)) => string(&rt, mtch, iter),
("bool", Some(mtch)) => boolean(&rt, mtch, iter),
(other, _mtchs) => {
debug!("Unknown command");
rt.handle_unknown_subcommand("imag-header", other, rt.cli())
.map_err_trace_exit_unwrap()
.code()
.unwrap_or(1)
},
};
::std::process::exit(exit_code)
}
fn read<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: reading value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
.map(|value| {
trace!("Processing headers: Got value {:?}", value);
writeln!(output, "{}", value)
.to_exit_code()
.map(|_| accu)
.unwrap_or_else(ExitCode::code)
})
.unwrap_or_else(|| {
// if value not present and configured
error!("Value not present for entry {} at {}", entry.get_location(), header_path);
1
})
})
}
fn has<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: has value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
let value = entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
.is_some();
writeln!(output, "{} - {}", entry.get_location(), value)
.to_exit_code()
.map(|_| if value { accu } else { 1 })
.unwrap_or_else(ExitCode::code)
})
}
fn hasnt<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: hasnt value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
let value = entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
.is_none();
writeln!(output, "{} - {}", entry.get_location(), value)
.to_exit_code()
.map(|_| if value { accu } else { 1 })
.unwrap_or_else(ExitCode::code)
})
}
macro_rules! implement_compare {
{ $mtch: ident, $path: expr, $t: ty, $compare: expr } => {{
trace!("Getting value at {}, comparing as {}", $path, stringify!($t));
if let Some(cmp) = $mtch.value_of($path).map(FromStr::from_str) {
let cmp : $t = cmp.unwrap(); // safe by clap
trace!("Getting value at {} = {}", $path, cmp);
$compare(cmp)
} else {
true
}
}}
}
fn int<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: int value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
let filter = ::filters::ops::bool::Bool::new(true)
.and(|i: &i64| -> bool {
implement_compare!(mtch, "header-int-eq", i64, |cmp| *i == cmp)
})
.and(|i: &i64| -> bool {
implement_compare!(mtch, "header-int-neq", i64, |cmp| *i != cmp)
})
.and(|i: &i64| -> bool {
implement_compare!(mtch, "header-int-lt", i64, |cmp| *i < cmp)
})
.and(|i: &i64| -> bool {
implement_compare!(mtch, "header-int-gt", i64, |cmp| *i > cmp)
})
.and(|i: &i64| -> bool {
implement_compare!(mtch, "header-int-lte", i64, |cmp| *i <= cmp)
})
.and(|i: &i64| -> bool {
implement_compare!(mtch, "header-int-gte", i64, |cmp| *i >= cmp)
});
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
if let Some(v) = entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
{
match v {
::toml::Value::Integer(i) => if filter.filter(&i) {
writeln!(output, "{} - {}", entry.get_location(), i)
.to_exit_code()
.map(|_| accu)
.unwrap_or_else(ExitCode::code)
} else { 1 },
_ => 1
}
} else { 1 }
})
}
fn float<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: float value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
let filter = ::filters::ops::bool::Bool::new(true)
.and(|i: &f64| -> bool {
implement_compare!(mtch, "header-float-eq", f64, |cmp| *i == cmp)
})
.and(|i: &f64| -> bool {
implement_compare!(mtch, "header-float-neq", f64, |cmp| *i != cmp)
})
.and(|i: &f64| -> bool {
implement_compare!(mtch, "header-float-lt", f64, |cmp| *i < cmp)
})
.and(|i: &f64| -> bool {
implement_compare!(mtch, "header-float-gt", f64, |cmp| *i > cmp)
})
.and(|i: &f64| -> bool {
implement_compare!(mtch, "header-float-lte", f64, |cmp| *i <= cmp)
})
.and(|i: &f64| -> bool {
implement_compare!(mtch, "header-float-gte", f64, |cmp| *i >= cmp)
});
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
if let Some(v) = entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
{
match v {
::toml::Value::Float(i) => if filter.filter(&i) {
writeln!(output, "{} - {}", entry.get_location(), i)
.to_exit_code()
.map(|_| accu)
.unwrap_or_else(ExitCode::code)
} else { 1 },
_ => 1
}
} else { 1 }
})
}
fn string<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: string value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
let filter = ::filters::ops::bool::Bool::new(true)
.and(|i: &String| -> bool {
implement_compare!(mtch, "header-string-eq", String, |cmp| *i == cmp)
})
.and(|i: &String| -> bool {
implement_compare!(mtch, "header-string-neq", String, |cmp| *i != cmp)
});
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
if let Some(v) = entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
{
match v {
::toml::Value::String(s) => if filter.filter(&s) {
writeln!(output, "{} - {}", entry.get_location(), s)
.to_exit_code()
.map(|_| accu)
.unwrap_or_else(ExitCode::code)
} else { 1 },
_ => 1
}
} else { 1 }
})
}
fn boolean<'a, 'e, I>(rt: &Runtime, mtch: &ArgMatches<'a>, iter: I) -> i32
where I: Iterator<Item = FileLockEntry<'e>>
{
debug!("Processing headers: bool value");
let header_path = get_header_path(mtch, "header-value-path");
let mut output = rt.stdout();
let filter = ::filters::ops::bool::Bool::new(true)
.and(|i: &bool| -> bool { *i })
.and(|i: &bool| -> bool { *i });
iter.fold(0, |accu, entry| {
trace!("Processing headers: working on {:?}", entry.get_location());
if let Some(v) = entry.get_header()
.read(header_path)
.map_err(Error::from)
.map_err_trace_exit_unwrap()
{
match v {
::toml::Value::Boolean(b) => if filter.filter(&b) {
writeln!(output, "{} - {}", entry.get_location(), b)
.to_exit_code()
.map(|_| accu)
.unwrap_or_else(ExitCode::code)
} else { 1 },
_ => 1
}
} else { 1 }
})
}
// helpers
//
fn get_header_path<'a>(mtch: &'a ArgMatches<'a>, path: &'static str) -> &'a str {
let header_path = mtch.value_of(path).unwrap(); // safe by clap
debug!("Processing headers: header path = {}", header_path);
header_path
}
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