-
Notifications
You must be signed in to change notification settings - Fork 263
/
hook_env.rs
165 lines (146 loc) · 5.2 KB
/
hook_env.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
use std::cmp::max;
use std::env::join_paths;
use std::ops::Deref;
use std::path::PathBuf;
use color_eyre::eyre::Result;
use console::truncate_str;
use itertools::Itertools;
use terminal_size::{terminal_size, Width};
use crate::cli::command::Command;
use crate::config::Config;
use crate::config::MissingRuntimeBehavior::{Prompt, Warn};
use crate::direnv::DirenvDiff;
use crate::env::__RTX_DIFF;
use crate::env_diff::{EnvDiff, EnvDiffOperation};
use crate::output::Output;
use crate::shell::{get_shell, ShellType};
use crate::toolset::{Toolset, ToolsetBuilder};
use crate::{env, hook_env};
/// [internal] called by activate hook to update env vars directory change
#[derive(Debug, clap::Args)]
#[clap(hide = true)]
pub struct HookEnv {
/// Shell type to generate script for
#[clap(long, short)]
shell: Option<ShellType>,
/// Show "rtx: <PLUGIN>@<VERSION>" message when changing directories
#[clap(long)]
status: bool,
}
impl Command for HookEnv {
fn run(self, mut config: Config, out: &mut Output) -> Result<()> {
if config.settings.missing_runtime_behavior == Prompt {
config.settings.missing_runtime_behavior = Warn;
}
let ts = ToolsetBuilder::new()
.with_install_missing()
.build(&mut config)?;
let shell = get_shell(self.shell).expect("no shell provided, use `--shell=zsh`");
out.stdout.write(hook_env::clear_old_env(&*shell));
let env = ts.env(&config);
let mut diff = EnvDiff::new(&env::PRISTINE_ENV, env);
let mut patches = diff.to_patches();
let mut paths = config.path_dirs.clone();
paths.extend(ts.list_paths(&config)); // load the active runtime paths
diff.path = paths.clone(); // update __RTX_DIFF with the new paths for the next run
patches.extend(self.build_path_operations(&paths, &__RTX_DIFF.path)?);
patches.push(self.build_diff_operation(&diff)?);
patches.push(self.build_watch_operation(&config)?);
let output = hook_env::build_env_commands(&*shell, &patches);
out.stdout.write(output);
if self.status {
self.display_status(&config, &ts, out);
}
Ok(())
}
}
impl HookEnv {
fn display_status(&self, config: &Config, ts: &Toolset, out: &mut Output) {
let installed_versions = ts
.list_current_installed_versions(config)
.into_iter()
.rev()
.map(|(_, v)| v.to_string())
.collect_vec();
if !installed_versions.is_empty() {
let w = match terminal_size() {
Some((Width(w), _)) => w,
None => 80,
} as usize;
let w = max(w, 40);
let status = installed_versions.into_iter().rev().join(" ");
rtxstatusln!(out, "{}", truncate_str(&status, w - 4, "..."));
}
}
/// modifies the PATH and optionally DIRENV_DIFF env var if it exists
fn build_path_operations(
&self,
installs: &Vec<PathBuf>,
to_remove: &Vec<PathBuf>,
) -> Result<Vec<EnvDiffOperation>> {
let new_path = join_paths([installs.clone(), env::PATH.clone()].concat())?
.to_string_lossy()
.to_string();
let mut ops = vec![EnvDiffOperation::Add("PATH".into(), new_path)];
if let Some(input) = env::DIRENV_DIFF.deref() {
match self.update_direnv_diff(input, installs, to_remove) {
Ok(Some(op)) => {
ops.push(op);
}
Err(err) => warn!("failed to update DIRENV_DIFF: {:#}", err),
_ => {}
}
}
Ok(ops)
}
/// inserts install path to DIRENV_DIFF both for old and new
/// this makes direnv think that these paths were added before it ran
/// that way direnv will not remove the path when it runs the next time
fn update_direnv_diff(
&self,
input: &str,
installs: &Vec<PathBuf>,
to_remove: &Vec<PathBuf>,
) -> Result<Option<EnvDiffOperation>> {
let mut diff = DirenvDiff::parse(input)?;
if diff.new_path().is_empty() {
return Ok(None);
}
for path in to_remove {
diff.remove_path_from_old_and_new(path)?;
}
for install in installs {
diff.add_path_to_old_and_new(install)?;
}
Ok(Some(EnvDiffOperation::Change(
"DIRENV_DIFF".into(),
diff.dump()?,
)))
}
fn build_diff_operation(&self, diff: &EnvDiff) -> Result<EnvDiffOperation> {
Ok(EnvDiffOperation::Add(
"__RTX_DIFF".into(),
diff.serialize()?,
))
}
fn build_watch_operation(&self, config: &Config) -> Result<EnvDiffOperation> {
let watch_files: Vec<_> = config
.config_files
.values()
.flat_map(|p| p.watch_files())
.collect();
let watches = hook_env::build_watches(&watch_files)?;
Ok(EnvDiffOperation::Add(
"__RTX_WATCH".into(),
hook_env::serialize_watches(&watches)?,
))
}
}
#[cfg(test)]
mod tests {
use crate::assert_cli;
#[test]
fn test_hook_env() {
assert_cli!("hook-env", "--status", "-s", "fish");
}
}