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</pre><pre class="rust"><code><span class="doccomment">//! # converter
//!
//! The module which converts the shell script to windows batch script.
//!
</span><span class="attribute">#[cfg(test)]
#[path = <span class="string">"./converter_test.rs"</span>]
</span><span class="kw">mod </span>converter_test;
<span class="kw">use </span>regex::Regex;
<span class="kw">static </span>SHELL2BATCH_PREFIX: <span class="kw-2">&</span>str = <span class="string">"# shell2batch:"</span>;
<span class="kw">fn </span>replace_flags(arguments: <span class="kw-2">&</span>str, flags_mappings: Vec<(<span class="kw-2">&</span>str, <span class="kw-2">&</span>str)>) -> String {
<span class="kw">let </span><span class="kw-2">mut </span>windows_arguments = arguments.to_string();
<span class="kw">for </span>flags <span class="kw">in </span>flags_mappings {
<span class="kw">let </span>(shell_flag, windows_flag) = flags;
windows_arguments = <span class="kw">match </span>Regex::new(shell_flag) {
<span class="prelude-val">Ok</span>(shell_regex) => {
<span class="kw">let </span>str_value = <span class="kw-2">&</span>shell_regex.replace_all(<span class="kw-2">&</span>windows_arguments, windows_flag);
str_value.to_string()
}
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => windows_arguments,
};
}
windows_arguments
}
<span class="kw">fn </span>convert_var<<span class="lifetime">'a</span>>(value: <span class="kw-2">&</span><span class="lifetime">'a </span>str, buffer: <span class="kw-2">&mut </span>Vec<<span class="kw-2">&</span><span class="lifetime">'a </span>str>) {
<span class="comment">// Batch file vars have one of two forms: `%NAME%` (corresponding to regular variables),
// or `%n` if `n` is a digit in the range 0 to 9 or an `*` (corresponding to input params).
</span><span class="kw">match </span>value {
<span class="string">"0" </span>| <span class="string">"1" </span>| <span class="string">"2" </span>| <span class="string">"3" </span>| <span class="string">"4" </span>| <span class="string">"5" </span>| <span class="string">"6" </span>| <span class="string">"7" </span>| <span class="string">"8" </span>| <span class="string">"9" </span>=> {
buffer.push(<span class="string">"%"</span>);
buffer.push(value);
}
<span class="string">"@" </span>=> buffer.push(<span class="string">"%*"</span>),
<span class="kw">_ </span>=> {
buffer.push(<span class="string">"%"</span>);
buffer.push(value);
buffer.push(<span class="string">"%"</span>);
}
}
}
<span class="kw">fn </span>replace_full_vars(arguments: <span class="kw-2">&</span>str) -> String {
<span class="kw">let </span><span class="kw-2">mut </span>parts: Vec<<span class="kw-2">&</span>str> = arguments.split(<span class="string">"${"</span>).collect();
<span class="kw">let </span><span class="kw-2">mut </span>buffer = <span class="macro">vec!</span>[];
buffer.push(parts.remove(<span class="number">0</span>));
<span class="kw">for </span>part <span class="kw">in </span>parts {
<span class="kw">let </span>(before, after, found) = <span class="kw">match </span>part.find(<span class="string">"}"</span>) {
<span class="prelude-val">None </span>=> (part, <span class="string">""</span>, <span class="bool-val">false</span>),
<span class="prelude-val">Some</span>(index) => {
<span class="kw">let </span>values = part.split_at(index);
(values.<span class="number">0</span>, <span class="kw-2">&</span>values.<span class="number">1</span>[<span class="number">1</span>..values.<span class="number">1</span>.len()], <span class="bool-val">true</span>)
}
};
<span class="kw">if </span>found {
convert_var(before, <span class="kw-2">&mut </span>buffer);
} <span class="kw">else </span>{
buffer.push(before)
}
<span class="kw">if </span>after.len() > <span class="number">0 </span>{
buffer.push(after);
}
}
buffer.join(<span class="string">""</span>).to_string()
}
<span class="kw">fn </span>replace_partial_vars(arguments: <span class="kw-2">&</span>str) -> String {
<span class="kw">let </span><span class="kw-2">mut </span>parts: Vec<<span class="kw-2">&</span>str> = arguments.split(<span class="string">'$'</span>).collect();
<span class="kw">let </span><span class="kw-2">mut </span>buffer = <span class="macro">vec!</span>[];
buffer.push(parts.remove(<span class="number">0</span>));
<span class="kw">for </span>part <span class="kw">in </span>parts {
<span class="kw">let </span>(before, after) = <span class="kw">match </span>part.find(<span class="string">" "</span>) {
<span class="prelude-val">None </span>=> (part, <span class="string">""</span>),
<span class="prelude-val">Some</span>(index) => part.split_at(index),
};
convert_var(before, <span class="kw-2">&mut </span>buffer);
<span class="kw">if </span>after.len() > <span class="number">0 </span>{
buffer.push(after);
}
}
buffer.join(<span class="string">""</span>).to_string()
}
<span class="kw">fn </span>replace_vars(arguments: <span class="kw-2">&</span>str) -> String {
<span class="kw">let </span><span class="kw-2">mut </span>updated_arguments = replace_full_vars(arguments);
updated_arguments = replace_partial_vars(<span class="kw-2">&</span>updated_arguments);
updated_arguments
}
<span class="kw">fn </span>add_arguments(arguments: <span class="kw-2">&</span>str, additional_arguments: Vec<String>, pre: bool) -> String {
<span class="kw">let </span><span class="kw-2">mut </span>windows_arguments = <span class="kw">if </span>pre {
<span class="string">""</span>.to_string()
} <span class="kw">else </span>{
arguments.to_string()
};
<span class="kw">for </span>additional_argument <span class="kw">in </span>additional_arguments {
windows_arguments.push_str(<span class="kw-2">&</span>additional_argument);
}
<span class="kw">if </span>pre {
<span class="kw">if </span>arguments.len() > <span class="number">0 </span>{
windows_arguments.push_str(<span class="string">" "</span>);
}
windows_arguments.push_str(arguments);
}
windows_arguments.trim_start().to_string()
}
<span class="kw">fn </span>convert_line(line: <span class="kw-2">&</span>str) -> String {
<span class="kw">if </span>line.contains(SHELL2BATCH_PREFIX) {
<span class="kw">let </span>index = line.find(SHELL2BATCH_PREFIX).unwrap() + SHELL2BATCH_PREFIX.len();
<span class="kw">let </span>windows_command = line[index..].trim();
windows_command.to_string()
} <span class="kw">else if </span>line.starts_with(<span class="string">"#"</span>) {
<span class="kw">let </span><span class="kw-2">mut </span>windows_command = String::from(line);
windows_command.remove(<span class="number">0</span>);
windows_command.insert_str(<span class="number">0</span>, <span class="string">"@REM "</span>);
windows_command
} <span class="kw">else </span>{
<span class="comment">// assume first word is the command
</span><span class="kw">let </span>(shell_command, <span class="kw-2">mut </span>arguments) = <span class="kw">match </span>line.find(<span class="string">" "</span>) {
<span class="prelude-val">None </span>=> (line, <span class="string">""</span>.to_string()),
<span class="prelude-val">Some</span>(index) => {
<span class="kw">let </span>(shell_command, arguments_str) = line.split_at(index);
(shell_command, arguments_str.to_string())
}
};
arguments = arguments.trim().to_string();
<span class="kw">let </span>(
<span class="kw-2">mut </span>windows_command,
flags_mappings,
pre_arguments,
post_arguments,
modify_path_separator,
) = <span class="kw">match </span>shell_command {
<span class="string">"cp" </span>=> {
<span class="comment">// There is no good `cp` equivalent on windows. There are
// two tools we can rely on:
//
// - xcopy, which is great for directory to directory
// copies.
// - copy, which is great for file to file/directory copies.
//
// We can select which one to use based on the presence of
// the -r flag.
</span><span class="kw">let </span>win_cmd = <span class="kw">match </span>Regex::new(<span class="string">"(^|\\s)-[^ ]*[rR]"</span>) {
<span class="prelude-val">Ok</span>(regex_instance) => {
<span class="kw">if </span>regex_instance.is_match(<span class="kw-2">&</span>arguments) {
<span class="string">"xcopy"</span>.to_string()
} <span class="kw">else </span>{
<span class="string">"copy"</span>.to_string()
}
}
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="string">"copy"</span>.to_string(),
};
<span class="kw">let </span>flags_mappings = <span class="kw">if </span>win_cmd == <span class="string">"xcopy"</span>.to_string() {
<span class="macro">vec!</span>[(<span class="string">"-[rR]"</span>, <span class="string">"/E"</span>)]
} <span class="kw">else </span>{
<span class="macro">vec!</span>[]
};
(win_cmd, flags_mappings, <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">true</span>)
}
<span class="string">"mv" </span>=> (<span class="string">"move"</span>.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">true</span>),
<span class="string">"ls" </span>=> (<span class="string">"dir"</span>.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">true</span>),
<span class="string">"rm" </span>=> {
<span class="kw">let </span>win_cmd = <span class="kw">match </span>Regex::new(<span class="string">"-[a-zA-Z]*[rR][a-zA-Z]* "</span>) {
<span class="prelude-val">Ok</span>(regex_instance) => {
<span class="kw">if </span>regex_instance.is_match(<span class="kw-2">&</span>arguments) {
<span class="string">"rmdir"</span>.to_string()
} <span class="kw">else </span>{
<span class="string">"del"</span>.to_string()
}
}
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="string">"del"</span>.to_string(),
};
<span class="kw">let </span>flags_mappings = <span class="kw">if </span>win_cmd == <span class="string">"rmdir"</span>.to_string() {
<span class="macro">vec!</span>[(<span class="string">"-([rR][fF]|[fF][rR]) "</span>, <span class="string">"/S /Q "</span>), (<span class="string">"-[rR]+ "</span>, <span class="string">"/S "</span>)]
} <span class="kw">else </span>{
<span class="macro">vec!</span>[(<span class="string">"-[fF] "</span>, <span class="string">"/Q "</span>)]
};
(win_cmd, flags_mappings, <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">true</span>)
}
<span class="string">"mkdir" </span>=> (
<span class="string">"mkdir"</span>.to_string(),
<span class="macro">vec!</span>[(<span class="string">"-[pP]"</span>, <span class="string">""</span>)],
<span class="macro">vec!</span>[],
<span class="macro">vec!</span>[],
<span class="bool-val">true</span>,
),
<span class="string">"clear" </span>=> (<span class="string">"cls"</span>.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">false</span>),
<span class="string">"grep" </span>=> (<span class="string">"find"</span>.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">false</span>),
<span class="string">"pwd" </span>=> (<span class="string">"chdir"</span>.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">false</span>),
<span class="string">"export" </span>=> (<span class="string">"set"</span>.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">false</span>),
<span class="string">"unset" </span>=> (
<span class="string">"set"</span>.to_string(),
<span class="macro">vec!</span>[],
<span class="macro">vec!</span>[],
<span class="macro">vec!</span>[<span class="string">"="</span>.to_string()],
<span class="bool-val">false</span>,
),
<span class="string">"touch" </span>=> {
<span class="kw">let </span><span class="kw-2">mut </span>file_arg = arguments.replace(<span class="string">"/"</span>, <span class="string">"\\"</span>).to_string();
file_arg.push_str(<span class="string">"+,,"</span>);
(
<span class="string">"copy"</span>.to_string(),
<span class="macro">vec!</span>[],
<span class="macro">vec!</span>[<span class="string">"/B "</span>.to_string(), file_arg.clone()],
<span class="macro">vec!</span>[],
<span class="bool-val">true</span>,
)
}
<span class="string">"set" </span>=> (
<span class="string">"@echo"</span>.to_string(),
<span class="macro">vec!</span>[(<span class="string">"-x"</span>, <span class="string">"on"</span>), (<span class="string">"\\+x"</span>, <span class="string">"off"</span>)],
<span class="macro">vec!</span>[],
<span class="macro">vec!</span>[],
<span class="bool-val">false</span>,
),
<span class="kw">_ </span>=> (shell_command.to_string(), <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="macro">vec!</span>[], <span class="bool-val">false</span>),
};
<span class="comment">// modify paths
</span><span class="kw">if </span>modify_path_separator {
arguments = arguments.replace(<span class="string">"/"</span>, <span class="string">"\\"</span>);
}
windows_command = windows_command.replace(<span class="string">"/"</span>, <span class="string">"\\"</span>);
<span class="kw">let </span><span class="kw-2">mut </span>windows_arguments = arguments.to_string();
<span class="comment">// add pre arguments
</span>windows_arguments = <span class="kw">if </span>pre_arguments.len() > <span class="number">0 </span>{
add_arguments(<span class="kw-2">&</span>windows_arguments, pre_arguments, <span class="bool-val">true</span>)
} <span class="kw">else </span>{
windows_arguments
};
<span class="comment">// replace flags
</span>windows_arguments = <span class="kw">if </span>flags_mappings.len() > <span class="number">0 </span>{
replace_flags(<span class="kw-2">&</span>arguments, flags_mappings)
} <span class="kw">else </span>{
windows_arguments
};
<span class="comment">// replace vars
</span>windows_arguments = <span class="kw">if </span>windows_arguments.len() > <span class="number">0 </span>{
replace_vars(<span class="kw-2">&</span>windows_arguments)
} <span class="kw">else </span>{
windows_arguments
};
windows_command = replace_vars(<span class="kw-2">&</span>windows_command);
<span class="comment">// add post arguments
</span>windows_arguments = <span class="kw">if </span>post_arguments.len() > <span class="number">0 </span>{
add_arguments(<span class="kw-2">&</span>windows_arguments, post_arguments, <span class="bool-val">false</span>)
} <span class="kw">else </span>{
windows_arguments
};
<span class="kw">if </span>windows_arguments.len() > <span class="number">0 </span>{
windows_command.push_str(<span class="string">" "</span>);
windows_command.push_str(<span class="kw-2">&</span>windows_arguments);
}
windows_command
}
}
<span class="doccomment">/// Converts the provided shell script and returns the windows batch script text.
</span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>run(script: <span class="kw-2">&</span>str) -> String {
<span class="kw">let </span>lines: Vec<<span class="kw-2">&</span>str> = script.split(<span class="string">'\n'</span>).collect();
<span class="kw">let </span><span class="kw-2">mut </span>windows_batch = <span class="macro">vec!</span>[];
<span class="kw">for </span><span class="kw-2">mut </span>line <span class="kw">in </span>lines {
line = line.trim();
<span class="kw">let </span><span class="kw-2">mut </span>line_string = line.to_string();
<span class="comment">// convert line
</span><span class="kw">let </span>converted_line = <span class="kw">if </span>line_string.len() == <span class="number">0 </span>{
line_string
} <span class="kw">else </span>{
convert_line(<span class="kw-2">&mut </span>line_string)
};
windows_batch.push(converted_line);
}
windows_batch.join(<span class="string">"\n"</span>)
}
</code></pre></div>
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