Add support for reading and writing using Git

.cargo/config

@@ -4,8 +4,3 @@
 #rustflags = ["-C", "link-arg=-fuse-ld=lld"]
 #[target.aarch64-unknown-linux-gnu]
 #rustflags = ["-C", "link-arg=-fuse-ld=lld"]
-
-# Statically link the MSVC C Runtime on Windows, so the EXEs can run without
-# installing the C Runtime DLL.
-[target.'cfg(all(target_env = "msvc"))']
-rustflags = ["-C", "target-feature=+crt-static"]

.github/workflows/release.yml

@@ -101,6 +101,17 @@ jobs:
             use-cross: false
 
     steps:
+
+      # Build all crates with a statically linked MSVCRT. Specifically crates
+      # that use `cc` in their build scripts (like libgit2-sys), will detect this
+      # and compile objects appropriatly. If there is a way to put this into a
+      # Cargo config file some where, let me know. .cargo/config did not work.
+      - name: Statically link MSVCRT
+        shell: bash
+        if: matrix.os == 'windows'
+        run: |
+          echo "RUSTFLAGS=-C target-feature=+crt-static" >> $GITHUB_ENV
+
       - name: Checkout repository
         uses: actions/checkout@v2
 

CHANGELOG.md

@@ -1,6 +1,8 @@
 WIP
 ===
 
+* Support reading files from a Git repo [#34](https://github.com/AustinWise/smeagol/issues/34)
+* Support writing files to a Git repo [#35](https://github.com/AustinWise/smeagol/issues/35)
 * Rename the settings in `smeagol.toml` to use kebob-case, rather than
   snake_case. Specifically `h1_title` was renamed to `h1-title` and `index_page`
   was renamed to `index-page`. This matches `Cargo.toml`'s use of kebob-case.

Cargo.toml

@@ -14,7 +14,9 @@ ring = "0.16.20"
 
 [dependencies]
 askama = "0.11"
+bitflags = "1.3.2"
 clap = { version = "3.0.0", features = ["derive"] }
+git2 = { version = "0.13", default-features = false }
 log = "0.4"
 once_cell = "1.9.0"
 pretty_env_logger = "0.4"

README.md

@@ -44,6 +44,9 @@ There are a few command line options:
   access it.
 * `--port` - takes an argument that specifies which port to listen on. `8000` by
   default.
+* `--fs` - instructs Smeagol to load and save using the file system. By default
+  Smeagol uses Git to load files committed to a Git repository and saves them by
+  committing them to the current branch.
 
 Additionally, the following settings can be put in a `smeagol.toml` file in the
 root directory of the wiki:
@@ -63,6 +66,7 @@ root directory of the wiki:
 
 * `index-page` on Gollum defaults to `Home`. Smeagol defaults to `README` to be
   compatible with online code hosting systems such as GitHub and Azure Devops.
+* The default port is `8000` rather than `4567`.
 
 ## Why Rust, please tell me more about why you love Rust
 

build.rs

@@ -97,7 +97,10 @@ impl EmbeddedFile {
 }
 
 fn rebuild_on_file_change(context: &mut ContextWriter, path: &Path) -> Result<(), io::Error> {
-    println!("cargo:rerun-if-changed={}", path.canonicalize()?.to_str().unwrap());
+    println!(
+        "cargo:rerun-if-changed={}",
+        path.canonicalize()?.to_str().unwrap()
+    );
     let mut file = File::open(path)?;
     io::copy(&mut file, context)?;
     Ok(())
@@ -146,6 +149,5 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         println!("cargo:rustc-link-arg-bins=/MANIFESTINPUT:windows_manifest.xml");
     }
 
-
     Ok(())
 }

src/error.rs

@@ -2,9 +2,16 @@ use thiserror::Error;
 
 #[derive(Error, Debug)]
 pub enum MyError {
+    #[error("Bare Git repos are not yet supported.")]
+    BareGitRepo,
     #[error("This is not valid Wiki folder: {path}")]
-    GitRepoDoesNotExist {
-        path: std::path::PathBuf
+    GitRepoDoesNotExist { path: std::path::PathBuf },
+    #[error("Failed to open Git repo: {err}")]
+    GitRepoDoesFailedToOpen { err: git2::Error },
+    #[error("Error when performing git operation: {source}")]
+    GitError {
+        #[from]
+        source: git2::Error,
     },
     #[error("Path is not valid.")]
     InvalidPath,
@@ -19,7 +26,7 @@ pub enum MyError {
         source: askama::Error,
     },
     #[error("Failed to read config file.")]
-    ConfigReadError { source: std::io::Error },
+    ConfigReadError { source: Box<MyError> },
     #[error("Failed to parse config file.")]
     ConfigParseError {
         #[from]

src/main.rs

@@ -10,8 +10,9 @@ mod settings;
 mod templates;
 mod wiki;
 
+use clap::StructOpt;
 use error::MyError;
-use repository::create_file_system_repository;
+use repository::create_repository;
 use settings::parse_settings_from_args;
 use wiki::Wiki;
 
@@ -21,9 +22,13 @@ use rocket::request::{FromRequest, Outcome, Request};
 static WIKI: OnceCell<Wiki> = OnceCell::new();
 
 fn create_wiki() -> Result<Wiki, MyError> {
-    let settings = parse_settings_from_args()?;
-    let repo = create_file_system_repository(settings.git_repo().clone())?;
-    Wiki::new(settings, Box::new(repo))
+    let args = settings::Args::parse();
+    let git_repo = args
+        .git_repo()
+        .unwrap_or_else(|| std::env::current_dir().unwrap());
+    let repo = create_repository(args.use_fs(), git_repo)?;
+    let settings = parse_settings_from_args(args, &repo)?;
+    Wiki::new(settings, repo)
 }
 
 #[rocket::async_trait]

src/page.rs

@@ -99,12 +99,7 @@ impl MarkupLanguage {
         }
     }
 
-    fn raw<S: Into<String>>(
-        &self,
-        file_stem: &str,
-        file_contents: S,
-        settings: &Settings,
-    ) -> Page {
+    fn raw<S: Into<String>>(&self, file_stem: &str, file_contents: S, settings: &Settings) -> Page {
         let file_contents: String = file_contents.into();
         match self {
             MarkupLanguage::Markdown => {