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</pre><pre class="rust"><code><span class="comment">/*
* Copyright (C) 2022 Aravinth Manivannan &lt;realaravinth@batsense.net&gt;
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see &lt;https://www.gnu.org/licenses/&gt;.
*/
</span><span class="kw">use </span>std::path::Path;
<span class="kw">use </span>std::path::PathBuf;
<span class="kw">use </span>git2::<span class="kw-2">*</span>;
<span class="kw">use </span>mime_guess::MimeGuess;
<span class="kw">use </span>num_enum::FromPrimitive;
<span class="kw">use </span>serde::{Deserialize, Serialize};
<span class="kw">use </span><span class="kw">crate</span>::errors::<span class="kw-2">*</span>;
<span class="doccomment">/// A FileMode represents the kind of tree entries used by git. It
/// resembles regular file systems modes, although FileModes are
/// considerably simpler (there are not so many), and there are some,
/// like Submodule that has no file system equivalent.
</span><span class="comment">// Adapted from https://github.com/go-git/go-git/blob/master/plumbing/filemode/filemode.go(Apache-2.0 License)
</span><span class="attribute">#[derive(Debug, PartialEq, Eq, Clone, FromPrimitive)]
#[repr(isize)]
</span><span class="kw">pub enum </span>GitFileMode {
<span class="doccomment">/// Empty is used as the GitFileMode of tree elements when comparing
/// trees in the following situations:
///
/// - the mode of tree elements before their creation.
/// - the mode of tree elements after their deletion.
/// - the mode of unmerged elements when checking the index.
///
/// Empty has no file system equivalent. As Empty is the zero value
/// of [GitFileMode]
</span>Empty = <span class="number">0</span>,
<span class="doccomment">/// Regular represent non-executable files.
</span>Regular = <span class="number">0o100644</span>,
<span class="doccomment">/// Dir represent a Directory.
</span>Dir = <span class="number">0o40000</span>,
<span class="doccomment">/// Deprecated represent non-executable files with the group writable bit set. This mode was
/// supported by the first versions of git, but it has been deprecated nowadays. This
/// library(github.com/go-git/go-git uses it, not realaravinth/gitpad at the moment) uses them
/// internally, so you can read old packfiles, but will treat them as Regulars when interfacing
/// with the outside world. This is the standard git behaviour.
</span>Deprecated = <span class="number">0o100664</span>,
<span class="doccomment">/// Executable represents executable files.
</span>Executable = <span class="number">0o100755</span>,
<span class="doccomment">/// Symlink represents symbolic links to files.
</span>Symlink = <span class="number">0o120000</span>,
<span class="doccomment">/// Submodule represents git submodules. This mode has no file system
/// equivalent.
</span>Submodule = <span class="number">0o160000</span>,
<span class="doccomment">/// Unsupported file mode
</span><span class="attribute">#[num_enum(default)]
</span>Unsupported = -<span class="number">1</span>,
}
<span class="kw">impl </span>From&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;_ </span>TreeEntry&lt;<span class="lifetime">&#39;_</span>&gt;&gt; <span class="kw">for </span>GitFileMode {
<span class="kw">fn </span>from(t: <span class="kw-2">&amp;</span>TreeEntry) -&gt; <span class="self">Self </span>{
GitFileMode::from(t.filemode() <span class="kw">as </span>isize)
}
}
<span class="kw">impl </span>From&lt;TreeEntry&lt;<span class="lifetime">&#39;_</span>&gt;&gt; <span class="kw">for </span>GitFileMode {
<span class="kw">fn </span>from(t: TreeEntry) -&gt; <span class="self">Self </span>{
GitFileMode::from(t.filemode() <span class="kw">as </span>isize)
}
}
<span class="attribute">#[derive(Debug, Clone, Eq, PartialEq)]
</span><span class="kw">pub struct </span>FileInfo {
<span class="kw">pub </span>filename: String,
<span class="kw">pub </span>content: ContentType,
<span class="kw">pub </span>mime: MimeGuess,
}
<span class="attribute">#[derive(Serialize, Eq, PartialEq, Clone, Debug, Deserialize)]
#[serde(rename_all = <span class="string">&quot;lowercase&quot;</span>)]
</span><span class="kw">pub enum </span>ContentType {
Binary(Vec&lt;u8&gt;),
Text(String),
}
<span class="kw">impl </span>ContentType {
<span class="kw">pub fn </span>bytes(<span class="self">self</span>) -&gt; Vec&lt;u8&gt; {
<span class="kw">match </span><span class="self">self </span>{
<span class="self">Self</span>::Text(text) =&gt; text.into(),
<span class="self">Self</span>::Binary(bin) =&gt; bin,
}
}
<span class="kw">pub fn </span>from_blob(blob: <span class="kw-2">&amp;</span>git2::Blob) -&gt; <span class="self">Self </span>{
<span class="kw">if </span>blob.is_binary() {
<span class="self">Self</span>::Binary(blob.content().to_vec())
} <span class="kw">else </span>{
<span class="self">Self</span>::Text(String::from_utf8_lossy(blob.content()).to_string())
}
}
}
<span class="doccomment">/// Please note that this method expects path to not contain any spaces
/// Use [escape_spaces] before calling this method
///
/// For example, a read request for &quot;foo bar.md&quot; will fail even if that file is present
/// in the repository. However, it will succeed if the output of [escape_spaces] is
/// used in the request.
</span><span class="kw">pub fn </span>read_file(repo_path: <span class="kw-2">&amp;</span>PathBuf, path: <span class="kw-2">&amp;</span>str) -&gt; ServiceResult&lt;FileInfo&gt; {
<span class="kw">let </span>repo = git2::Repository::open(repo_path).unwrap();
<span class="kw">let </span>head = repo.head().unwrap();
<span class="kw">let </span>tree = head.peel_to_tree().unwrap();
read_file_inner(<span class="kw-2">&amp;</span>repo, path, <span class="kw-2">&amp;</span>tree)
}
<span class="kw">pub fn </span>read_preview_file(
repo_path: <span class="kw-2">&amp;</span>PathBuf,
preview_name: <span class="kw-2">&amp;</span>str,
path: <span class="kw-2">&amp;</span>str,
) -&gt; ServiceResult&lt;FileInfo&gt; {
<span class="kw">let </span>repo = git2::Repository::open(repo_path).unwrap();
<span class="kw">let </span>branch = repo
.find_branch(preview_name, git2::BranchType::Local)
.unwrap();
<span class="comment">// let tree = head.peel_to_tree().unwrap();
</span><span class="kw">let </span>branch = branch.into_reference();
<span class="kw">let </span>tree = branch.peel_to_tree().unwrap();
read_file_inner(<span class="kw-2">&amp;</span>repo, path, <span class="kw-2">&amp;</span>tree)
}
<span class="kw">fn </span>read_file_inner(
repo: <span class="kw-2">&amp;</span>git2::Repository,
path: <span class="kw-2">&amp;</span>str,
tree: <span class="kw-2">&amp;</span>git2::Tree,
) -&gt; ServiceResult&lt;FileInfo&gt; {
<span class="kw">fn </span>read_file(id: Oid, repo: <span class="kw-2">&amp;</span>git2::Repository) -&gt; ContentType {
<span class="kw">let </span>blob = repo.find_blob(id).unwrap();
ContentType::from_blob(<span class="kw-2">&amp;</span>blob)
}
<span class="kw">fn </span>get_index_file(id: Oid, repo: <span class="kw-2">&amp;</span>Repository) -&gt; ContentType {
<span class="kw">let </span>tree = repo.find_tree(id).unwrap();
<span class="kw">const </span>INDEX_FILES: [<span class="kw-2">&amp;</span>str; <span class="number">7</span>] = [
<span class="string">&quot;index.html&quot;</span>,
<span class="string">&quot;index.md&quot;</span>,
<span class="string">&quot;INDEX.md&quot;</span>,
<span class="string">&quot;README.md&quot;</span>,
<span class="string">&quot;README&quot;</span>,
<span class="string">&quot;readme.txt&quot;</span>,
<span class="string">&quot;readme&quot;</span>,
];
<span class="kw">let </span>content = <span class="kw">if let </span><span class="prelude-val">Some</span>(index_file) = tree.iter().find(|x| {
<span class="kw">if let </span><span class="prelude-val">Some</span>(name) = x.name() {
INDEX_FILES.iter().any(|index_name| <span class="kw-2">*</span>index_name == name)
} <span class="kw">else </span>{
<span class="bool-val">false
</span>}
}) {
read_file(index_file.id(), repo)
} <span class="kw">else </span>{
<span class="macro">unimplemented!</span>(<span class="string">&quot;Index file not found&quot;</span>);
};
content
}
<span class="kw">let </span>inner = |repo: <span class="kw-2">&amp;</span>git2::Repository, tree: <span class="kw-2">&amp;</span>git2::Tree| -&gt; ServiceResult&lt;FileInfo&gt; {
<span class="comment">// let head = repo.head().unwrap();
// let tree = head.peel_to_tree().unwrap();
</span><span class="kw">let </span><span class="kw-2">mut </span>path = path;
<span class="kw">if </span>path == <span class="string">&quot;/&quot; </span>{
<span class="kw">let </span>content = get_index_file(tree.id(), repo);
<span class="kw">return </span><span class="prelude-val">Ok</span>(FileInfo {
filename: <span class="string">&quot;/&quot;</span>.into(),
content,
mime: mime_guess::from_path(<span class="string">&quot;index.html&quot;</span>),
});
}
<span class="kw">if </span>path.starts_with(<span class="string">&#39;/&#39;</span>) {
path = path.trim_start_matches(<span class="string">&#39;/&#39;</span>);
}
<span class="kw">let </span>entry = tree.get_path(Path::new(path)).unwrap();
<span class="comment">//FileType::Dir(items)
</span><span class="kw">let </span>mode: GitFileMode = entry.clone().into();
<span class="kw">if let </span><span class="prelude-val">Some</span>(name) = entry.name() {
<span class="kw">let </span>file = <span class="kw">match </span>mode {
GitFileMode::Dir =&gt; get_index_file(entry.id(), repo),
GitFileMode::Submodule =&gt; <span class="macro">unimplemented!</span>(),
GitFileMode::Empty =&gt; <span class="macro">unimplemented!</span>(),
GitFileMode::Deprecated =&gt; <span class="macro">unimplemented!</span>(),
GitFileMode::Unsupported =&gt; <span class="macro">unimplemented!</span>(),
GitFileMode::Symlink =&gt; <span class="macro">unimplemented!</span>(),
GitFileMode::Executable =&gt; read_file(entry.id(), repo),
GitFileMode::Regular =&gt; read_file(entry.id(), repo),
};
<span class="prelude-val">Ok</span>(FileInfo {
filename: name.to_string(),
mime: mime_guess::from_path(path),
content: file,
})
} <span class="kw">else </span>{
<span class="macro">unimplemented!</span>();
}
};
<span class="comment">//let repo = git2::Repository::open(repo_path).unwrap();
</span>inner(repo, tree)
}
<span class="attribute">#[cfg(test)]
</span><span class="kw">pub mod </span>tests {
<span class="kw">use super</span>::<span class="kw-2">*</span>;
<span class="kw">const </span>FILE_CONTENT: <span class="kw-2">&amp;</span>str = <span class="string">&quot;foobar&quot;</span>;
<span class="kw">fn </span>write_file_util(path: <span class="kw-2">&amp;</span>str) {
<span class="comment">// TODO change updated in DB
</span><span class="kw">let </span>inner = |repo: <span class="kw-2">&amp;mut </span>Repository| -&gt; ServiceResult&lt;()&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>tree_builder = <span class="kw">match </span>repo.head() {
<span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; repo.treebuilder(<span class="prelude-val">None</span>).unwrap(),
<span class="prelude-val">Ok</span>(h) =&gt; repo.treebuilder(<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span>h.peel_to_tree().unwrap())).unwrap(),
};
<span class="kw">let </span>odb = repo.odb().unwrap();
<span class="kw">let </span>obj = odb
.write(ObjectType::Blob, FILE_CONTENT.as_bytes())
.unwrap();
tree_builder.insert(<span class="string">&quot;README.txt&quot;</span>, obj, <span class="number">0o100644</span>).unwrap();
<span class="kw">let </span>tree_hash = tree_builder.write().unwrap();
<span class="kw">let </span>author = Signature::now(<span class="string">&quot;librepages&quot;</span>, <span class="string">&quot;admin@librepages.org&quot;</span>).unwrap();
<span class="kw">let </span>committer = Signature::now(<span class="string">&quot;librepages&quot;</span>, <span class="string">&quot;admin@librepages.org&quot;</span>).unwrap();
<span class="kw">let </span>commit_tree = repo.find_tree(tree_hash).unwrap();
<span class="kw">let </span>msg = <span class="string">&quot;&quot;</span>;
<span class="kw">if let </span><span class="prelude-val">Err</span>(e) = repo.head() {
<span class="kw">if </span>e.code() == ErrorCode::UnbornBranch &amp;&amp; e.class() == ErrorClass::Reference {
<span class="comment">// fisrt commit ever; set parent commit(s) to empty array
</span>repo.commit(<span class="prelude-val">Some</span>(<span class="string">&quot;HEAD&quot;</span>), <span class="kw-2">&amp;</span>author, <span class="kw-2">&amp;</span>committer, msg, <span class="kw-2">&amp;</span>commit_tree, <span class="kw-2">&amp;</span>[])
.unwrap();
} <span class="kw">else </span>{
<span class="macro">panic!</span>(<span class="string">&quot;{:?}&quot;</span>, e);
}
} <span class="kw">else </span>{
<span class="kw">let </span>head_ref = repo.head().unwrap();
<span class="kw">let </span>head_commit = head_ref.peel_to_commit().unwrap();
repo.commit(
<span class="prelude-val">Some</span>(<span class="string">&quot;HEAD&quot;</span>),
<span class="kw-2">&amp;</span>author,
<span class="kw-2">&amp;</span>committer,
msg,
<span class="kw-2">&amp;</span>commit_tree,
<span class="kw-2">&amp;</span>[<span class="kw-2">&amp;</span>head_commit],
)
.unwrap();
};
<span class="prelude-val">Ok</span>(())
};
<span class="kw">if </span>Repository::open(path).is_err() {
<span class="kw">let _ </span>= Repository::init(path);
}
<span class="kw">let </span><span class="kw-2">mut </span>repo = Repository::open(path).unwrap();
<span class="kw">let _ </span>= inner(<span class="kw-2">&amp;mut </span>repo);
}
<span class="attribute">#[test]
</span><span class="kw">fn </span>test_git_write_read_works() {
<span class="kw">const </span>PATH: <span class="kw-2">&amp;</span>str = <span class="string">&quot;/tmp/librepges/test_git_write_read_works&quot;</span>;
write_file_util(PATH);
<span class="kw">let </span>resp = read_file(<span class="kw-2">&amp;</span>Path::new(PATH).into(), <span class="string">&quot;README.txt&quot;</span>).unwrap();
<span class="macro">assert_eq!</span>(resp.filename, <span class="string">&quot;README.txt&quot;</span>);
<span class="macro">assert_eq!</span>(resp.content.bytes(), FILE_CONTENT.as_bytes());
<span class="macro">assert_eq!</span>(resp.mime.first().unwrap(), <span class="string">&quot;text/plain&quot;</span>);
<span class="kw">let </span>resp = read_preview_file(<span class="kw-2">&amp;</span>Path::new(PATH).into(), <span class="string">&quot;master&quot;</span>, <span class="string">&quot;README.txt&quot;</span>).unwrap();
<span class="macro">assert_eq!</span>(resp.filename, <span class="string">&quot;README.txt&quot;</span>);
<span class="macro">assert_eq!</span>(resp.content.bytes(), FILE_CONTENT.as_bytes());
<span class="macro">assert_eq!</span>(resp.mime.first().unwrap(), <span class="string">&quot;text/plain&quot;</span>);
}
}
</code></pre></div>
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