Add initial cli funcitonality

4 months ago · b2f7e35572
commit b2f7e35572
7 changed files with 1288 additions and 0 deletions
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+ "windows_i686_msvc 0.48.5",
+ "windows_x86_64_gnu 0.48.5",
+ "windows_x86_64_gnullvm 0.48.5",
+ "windows_x86_64_msvc 0.48.5",
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+ "windows_i686_gnu 0.52.0",
+ "windows_i686_msvc 0.52.0",
+ "windows_x86_64_gnu 0.52.0",
+ "windows_x86_64_gnullvm 0.52.0",
+ "windows_x86_64_msvc 0.52.0",
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+[[package]]
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+[[package]]
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+
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+dependencies = [
+ "memchr",
+]
--- a/Cargo.toml
+++ b/Cargo.toml
@ -0,0 +1,18 @@
+[package]
+name = "silo"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.4.14", features = ["derive", "env"] }
+dirs = "5.0.1"
+handlebars = "5.0.0"
+handlebars_switch = "0.6.0"
+lazy_static = "1.4.0"
+miette = { version = "5.10.0", features = ["serde", "fancy"] }
+serde = { version = "1.0.195", features = ["derive"] }
+serde_json = "1.0.111"
+sys-info = "0.9.1"
+toml = "0.8.8"
--- a/src/args.rs
+++ b/src/args.rs
@ -0,0 +1,20 @@
+use std::path::PathBuf;
+
+use clap::{Parser, Subcommand};
+
+#[derive(Clone, Debug, Parser)]
+pub struct Args {
+    #[arg(short, long, default_value = ".")]
+    pub repo: PathBuf,
+    /// The silo command to execute
+    #[command(subcommand)]
+    pub command: Command,
+}
+
+#[derive(Clone, Debug, Subcommand)]
+pub enum Command {
+    /// Initialize a silo repository
+    Init,
+    /// Applies the configuration stored in a silo repo
+    Apply,
+}
--- a/src/main.rs
+++ b/src/main.rs
@ -0,0 +1,26 @@
+use args::Args;
+use clap::Parser;
+use miette::Result;
+use repo::SiloRepo;
+
+mod args;
+mod repo;
+mod templating;
+
+fn main() -> Result<()> {
+    let args: Args = Args::parse();
+    match &args.command {
+        args::Command::Init => todo!(),
+        args::Command::Apply => apply(&args)?,
+    }
+
+    Ok(())
+}
+
+fn apply(args: &Args) -> Result<()> {
+    let repo = SiloRepo::open(&args.repo)?;
+    dbg!(&repo);
+    repo.apply()?;
+
+    Ok(())
+}
--- a/src/repo.rs
+++ b/src/repo.rs
@ -0,0 +1,167 @@
+use handlebars::Handlebars;
+use miette::{bail, Context, IntoDiagnostic, Result};
+use serde::Deserialize;
+use serde_json::json;
+use std::{
+    env,
+    fs::{self},
+    path::{Path, PathBuf},
+};
+
+use crate::templating;
+
+#[derive(Clone, Debug)]
+pub struct SiloRepo {
+    pub root: DirEntry,
+}
+
+impl SiloRepo {
+    pub fn open(path: &Path) -> Result<Self> {
+        if !path.try_exists().into_diagnostic()? {
+            bail!("The repository {path:?} does not exist");
+        }
+
+        Ok(Self {
+            root: DirEntry::parse(path.to_owned())?,
+        })
+    }
+
+    pub fn apply(&self) -> Result<()> {
+        let cwd = env::current_dir()
+            .into_diagnostic()
+            .context("get current dir")?;
+        self.root.apply(&cwd)
+    }
+}
+
+#[derive(Clone, Debug)]
+pub enum DirEntry {
+    File(FileEntry),
+    Dir(PathBuf, Vec<DirEntry>),
+    Root(PathBuf, RootDirData, Vec<DirEntry>),
+}
+
+impl DirEntry {
+    fn parse(path: PathBuf) -> Result<Self> {
+        if path.is_dir() {
+            let meta_file = path.join("dir.toml");
+            let mut children = Vec::new();
+
+            for read_entry in fs::read_dir(&path).into_diagnostic()? {
+                let read_entry = read_entry.into_diagnostic()?;
+                children.push(DirEntry::parse(read_entry.path())?);
+            }
+
+            if meta_file.exists() {
+                let metadata = RootDirData::read(&meta_file)?;
+                Ok(Self::Root(path, metadata, children))
+            } else {
+                Ok(Self::Dir(path, children))
+            }
+        } else {
+            Ok(Self::File(FileEntry::parse(path)?))
+        }
+    }
+
+    fn apply(&self, cwd: &Path) -> Result<()> {
+        match self {
+            DirEntry::File(file) => file.apply(cwd),
+            DirEntry::Dir(p, children) => {
+                let cwd = cwd.join(p.iter().last().unwrap());
+                if !cwd.exists() {
+                    fs::create_dir_all(&cwd)
+                        .into_diagnostic()
+                        .with_context(|| format!("Creating directory {cwd:?}"))?;
+                }
+                for child in children {
+                    child.apply(&cwd)?;
+                }
+                Ok(())
+            }
+            DirEntry::Root(_, data, children) => {
+                let engine = templating::engine();
+                let rendered_path = engine
+                    .render_template(&data.path, templating::context())
+                    .into_diagnostic()
+                    .with_context(|| format!("render template {}", data.path))?;
+
+                let cwd = PathBuf::from(rendered_path);
+
+                if !cwd.exists() {
+                    fs::create_dir_all(&cwd)
+                        .into_diagnostic()
+                        .with_context(|| format!("Creating directory {cwd:?}"))?;
+                }
+                for child in children {
+                    child.apply(&cwd)?;
+                }
+                Ok(())
+            }
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub enum FileEntry {
+    Template(PathBuf),
+    Plain(PathBuf),
+    Metadata,
+}
+
+impl FileEntry {
+    fn parse(path: PathBuf) -> Result<Self> {
+        if let Some(true) = path.extension().map(|e| e == "tmpl") {
+            Ok(Self::Template(path))
+        } else if path.file_name().unwrap() == "dir.toml" {
+            Ok(Self::Metadata)
+        } else {
+            Ok(Self::Plain(path))
+        }
+    }
+
+    fn apply(&self, cwd: &Path) -> Result<()> {
+        match self {
+            FileEntry::Template(path) => {
+                let contents = fs::read_to_string(path).into_diagnostic()?;
+
+                let rendered = templating::engine()
+                    .render_template(&contents, templating::context())
+                    .into_diagnostic()
+                    .with_context(|| format!("rendering template {path:?}"))?;
+
+                let path = path.with_extension("");
+                let filename = path.file_name().unwrap();
+                let dest = cwd.join(filename);
+                fs::write(&dest, rendered)
+                    .into_diagnostic()
+                    .with_context(|| format!("write to destination {dest:?}"))?;
+            }
+            FileEntry::Plain(path) => {
+                let filename = path.file_name().unwrap();
+                let dest = cwd.join(filename);
+                fs::copy(path, &dest)
+                    .into_diagnostic()
+                    .with_context(|| format!("copy {path:?} to {dest:?}"))?;
+            }
+            FileEntry::Metadata => {}
+        }
+
+        Ok(())
+    }
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct RootDirData {
+    pub path: String,
+}
+
+impl RootDirData {
+    fn read(path: &Path) -> Result<Self> {
+        let contents = fs::read_to_string(path)
+            .into_diagnostic()
+            .with_context(|| format!("reading metadata file {path:?}"))?;
+        toml::from_str(&contents)
+            .into_diagnostic()
+            .with_context(|| format!("parsing metadata file {path:?}"))
+    }
+}
--- a/src/templating.rs
+++ b/src/templating.rs
@ -0,0 +1,77 @@
+use std::{env, path::PathBuf};
+
+use handlebars::Handlebars;
+use handlebars_switch::SwitchHelper;
+use lazy_static::lazy_static;
+use serde::Serialize;
+
+pub fn engine<'a>() -> Handlebars<'a> {
+    let mut hb = Handlebars::new();
+    hb.register_helper("switch", Box::new(SwitchHelper));
+    hb
+}
+
+pub fn context<'a>() -> &'a ContextData {
+    lazy_static! {
+        static ref CTX: ContextData = ContextData::default();
+    }
+    &*CTX
+}
+
+#[derive(Clone, Debug, Serialize, Default)]
+pub struct ContextData {
+    pub dirs: ContextDirs,
+    pub system: SystemData,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct SystemData {
+    pub os: String,
+    pub family: String,
+    pub os_release: String,
+    pub arch: String,
+    pub hostname: String,
+    pub cpu_num: u32,
+}
+
+impl Default for SystemData {
+    fn default() -> Self {
+        Self {
+            os: env::consts::OS.into(),
+            family: env::consts::FAMILY.into(),
+            arch: env::consts::ARCH.into(),
+            hostname: sys_info::hostname().unwrap(),
+            cpu_num: sys_info::cpu_num().unwrap(),
+            os_release: sys_info::os_release().unwrap(),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct ContextDirs {
+    pub home: PathBuf,
+    pub config: PathBuf,
+    pub data: PathBuf,
+    pub global_config: PathBuf,
+    pub global_data: PathBuf,
+}
+
+impl Default for ContextDirs {
+    fn default() -> Self {
+        Self {
+            home: dirs::home_dir().unwrap_or_else(|| PathBuf::from("~")),
+            config: dirs::config_dir().unwrap_or_else(|| PathBuf::from("~/.config")),
+            data: dirs::data_dir().unwrap_or_else(|| PathBuf::from("~/.local/share")),
+            global_config: if cfg!(windows) {
+                PathBuf::from("~/AppData/Roaming")
+            } else {
+                PathBuf::from("/etc")
+            },
+            global_data: if cfg!(windows) {
+                PathBuf::from("~/AppData/Local")
+            } else {
+                PathBuf::from("/usr/share")
+            },
+        }
+    }
+}