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</pre></div><pre class="rust"><code><span class="kw">use </span>std::io::{<span class="self">self</span>, <span class="prelude-ty">Result</span>};
<span class="kw">use </span>std::path::Path;
<span class="kw">use </span>std::path::PathBuf;
<span class="kw">use </span>std::process::{Command, Stdio};
<span class="kw">use </span>std::str;
<span class="kw">use </span>std::{env, fs};
<span class="kw">const </span>APP_NAME: <span class="kw-2">&</span>str = <span class="string">"only_scrape"</span>;
<span class="kw">const </span>DEFAULT_HOST: <span class="kw-2">&</span>str = <span class="string">"https://storage.googleapis.com"</span>;
<span class="kw">pub fn </span>download_and_install_chrome() -> io::Result<PathBuf> {
<span class="kw">let </span>install_dir = guess_install_dir()<span class="question-mark">?</span>;
<span class="kw">let </span>(platform, archive_name, chrome_path) = platform_details();
<span class="kw">let </span>app_path = install_dir.join(archive_name).join(<span class="kw-2">&</span>chrome_path);
<span class="kw">if </span>app_path.exists() {
<span class="kw">return </span><span class="prelude-val">Ok</span>(app_path);
}
<span class="kw">let </span>revision = latest_revision(platform)<span class="question-mark">?</span>;
<span class="kw">let </span>url = <span class="macro">format!</span>(
<span class="string">"{DEFAULT_HOST}/chromium-browser-snapshots/{platform}/{revision}/{archive_name}.zip"
</span>);
<span class="kw">let </span>output_path = install_dir.join(<span class="macro">format!</span>(<span class="string">"{platform}-{revision}.zip"</span>));
fs::create_dir_all(<span class="kw-2">&</span>install_dir)<span class="question-mark">?</span>;
download_file(<span class="kw-2">&</span>url, <span class="kw-2">&</span>output_path)<span class="question-mark">?</span>;
unzip_file(<span class="kw-2">&</span>output_path, <span class="kw-2">&</span>install_dir)<span class="question-mark">?</span>;
fs::remove_file(<span class="kw-2">&</span>output_path).unwrap_or_else(|<span class="kw">_</span>| <span class="macro">println!</span>(<span class="string">"Failed to delete zip"</span>));
<span class="prelude-val">Ok</span>(app_path)
}
<span class="kw">fn </span>guess_install_dir() -> <span class="prelude-ty">Result</span><PathBuf> {
env::var(<span class="string">"HOME"</span>)
.or_else(|<span class="kw">_</span>| env::var(<span class="string">"USERPROFILE"</span>))
.map(PathBuf::from)
.map(|dir| dir.join(<span class="macro">format!</span>(<span class="string">".{}"</span>, APP_NAME)))
.map_err(|<span class="kw">_</span>| io::Error::new(io::ErrorKind::NotFound, <span class="string">"Home directory not found"</span>))
}
<span class="kw">fn </span>platform_details() -> (<span class="kw-2">&</span><span class="lifetime">'static </span>str, <span class="kw-2">&</span><span class="lifetime">'static </span>str, PathBuf) {
<span class="kw">let </span>(platform, archive_name) = <span class="kw">match </span>(<span class="macro">cfg!</span>(target_os = <span class="string">"linux"</span>), <span class="macro">cfg!</span>(target_arch = <span class="string">"aarch64"</span>))
{
(<span class="bool-val">true</span>, <span class="kw">_</span>) => (<span class="string">"Linux_x64"</span>, <span class="string">"chrome-linux"</span>),
(<span class="kw">_</span>, <span class="bool-val">true</span>) => (<span class="string">"Mac_arm"</span>, <span class="string">"chrome-mac"</span>),
<span class="kw">_ if </span><span class="macro">cfg!</span>(target_os = <span class="string">"macos"</span>) => (<span class="string">"Mac"</span>, <span class="string">"chrome-mac"</span>),
<span class="kw">_ if </span><span class="macro">cfg!</span>(target_os = <span class="string">"windows"</span>) => (<span class="string">"Win_x64"</span>, <span class="string">"chrome-win"</span>),
<span class="kw">_ </span>=> <span class="macro">panic!</span>(<span class="string">"Unsupported platform"</span>),
};
<span class="kw">let </span>chrome_path = <span class="kw">match </span>platform {
<span class="string">"Linux_x64" </span>=> PathBuf::from(<span class="string">"chrome"</span>),
<span class="string">"Win_x64" </span>=> PathBuf::from(<span class="string">"chrome.exe"</span>),
<span class="string">"Mac" </span>| <span class="string">"Mac_arm" </span>=> PathBuf::from(<span class="string">"Chromium.app/Contents/MacOS/Chromium"</span>),
<span class="kw">_ </span>=> <span class="macro">panic!</span>(<span class="string">"Unsupported platform"</span>),
};
(platform, archive_name, chrome_path)
}
<span class="kw">fn </span>latest_revision(platform: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><String> {
<span class="kw">let </span>url = <span class="macro">format!</span>(<span class="string">"{DEFAULT_HOST}/chromium-browser-snapshots/{platform}/LAST_CHANGE"</span>);
<span class="kw">let </span>output = Command::new(<span class="string">"curl"</span>).arg(<span class="kw-2">&</span>url).output()<span class="question-mark">?</span>;
<span class="kw">if </span>output.status.success() {
<span class="kw">let </span>stdout = String::from_utf8(output.stdout)
.map_err(|<span class="kw">_</span>| io::Error::new(io::ErrorKind::InvalidData, <span class="string">"Invalid UTF-8 sequence"</span>))<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(stdout.trim().to_string())
} <span class="kw">else </span>{
<span class="prelude-val">Err</span>(io::Error::new(
io::ErrorKind::Other,
<span class="string">"Failed to get latest revision"</span>,
))
}
}
<span class="kw">fn </span>download_file(url: <span class="kw-2">&</span>str, output_path: <span class="kw-2">&</span>PathBuf) -> io::Result<()> {
Command::new(<span class="string">"curl"</span>)
.arg(<span class="string">"-o"</span>)
.arg(output_path)
.arg(url)
.status()
.and_then(|status| {
<span class="kw">if </span>status.success() {
<span class="prelude-val">Ok</span>(())
} <span class="kw">else </span>{
<span class="prelude-val">Err</span>(io::Error::new(
io::ErrorKind::Other,
<span class="string">"Failed to download file"</span>,
))
}
})
}
<span class="kw">fn </span>unzip_file(zip_path: <span class="kw-2">&</span>Path, destination: <span class="kw-2">&</span>Path) -> io::Result<()> {
<span class="comment">// Determine the command based on the operating system.
</span><span class="attr">#[cfg(target_os = <span class="string">"windows"</span>)]
</span><span class="kw">let </span><span class="kw-2">mut </span>command = {
<span class="kw">let </span><span class="kw-2">mut </span>cmd = Command::new(<span class="string">"tar"</span>);
cmd.args(<span class="kw-2">&</span>[
<span class="string">"-xf"</span>,
zip_path.to_str().unwrap(),
<span class="string">"-C"</span>,
destination.to_str().unwrap(),
]);
cmd
};
<span class="attr">#[cfg(not(target_os = <span class="string">"windows"</span>))]
</span><span class="kw">let </span><span class="kw-2">mut </span>command = {
<span class="kw">let </span><span class="kw-2">mut </span>cmd = Command::new(<span class="string">"unzip"</span>);
cmd.args(<span class="kw-2">&</span>[
<span class="string">"-o"</span>,
zip_path.to_str().unwrap(),
<span class="string">"-d"</span>,
destination.to_str().unwrap(),
]);
cmd
};
<span class="comment">// Execute the command.
</span><span class="kw">let </span><span class="kw-2">mut </span>child = command
.stdout(Stdio::inherit())
.stderr(Stdio::inherit())
.spawn()<span class="question-mark">?</span>;
<span class="comment">// Wait for the command to complete.
</span><span class="kw">let </span>output = child.wait()<span class="question-mark">?</span>;
<span class="kw">if </span>output.success() {
<span class="prelude-val">Ok</span>(())
} <span class="kw">else </span>{
<span class="prelude-val">Err</span>(io::Error::new(
io::ErrorKind::Other,
<span class="string">"Failed to extract ZIP file"</span>,
))
}
}
</code></pre></div></section></main></body></html>