Rename CodeMap/FileMap to SourceMap/SourceFile

#2946

1 files changed, 122 insertions, 0 deletions

diff --git a/src/source_file.rs b/src/source_file.rs
new file mode 100644
index 00000000000..306f2626639
--- /dev/null
+++ b/src/source_file.rs
@@ -0,0 +1,122 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::fs;
+use std::io::{self, Write};
+
+use checkstyle::output_checkstyle_file;
+use config::{Config, EmitMode, FileName, Verbosity};
+use rustfmt_diff::{make_diff, output_modified, print_diff};
+
+#[cfg(test)]
+use formatting::FileRecord;
+
+// Append a newline to the end of each file.
+pub fn append_newline(s: &mut String) {
+    s.push_str("\n");
+}
+
+#[cfg(test)]
+pub(crate) fn write_all_files<T>(
+    source_file: &[FileRecord],
+    out: &mut T,
+    config: &Config,
+) -> Result<(), io::Error>
+where
+    T: Write,
+{
+    if config.emit_mode() == EmitMode::Checkstyle {
+        write!(out, "{}", ::checkstyle::header())?;
+    }
+    for &(ref filename, ref text) in source_file {
+        write_file(text, filename, out, config)?;
+    }
+    if config.emit_mode() == EmitMode::Checkstyle {
+        write!(out, "{}", ::checkstyle::footer())?;
+    }
+
+    Ok(())
+}
+
+pub fn write_file<T>(
+    formatted_text: &str,
+    filename: &FileName,
+    out: &mut T,
+    config: &Config,
+) -> Result<bool, io::Error>
+where
+    T: Write,
+{
+    let filename_to_path = || match *filename {
+        FileName::Real(ref path) => path,
+        _ => panic!("cannot format `{}` and emit to files", filename),
+    };
+
+    match config.emit_mode() {
+        EmitMode::Files if config.make_backup() => {
+            let filename = filename_to_path();
+            let ori = fs::read_to_string(filename)?;
+            if ori != formatted_text {
+                // Do a little dance to make writing safer - write to a temp file
+                // rename the original to a .bk, then rename the temp file to the
+                // original.
+                let tmp_name = filename.with_extension("tmp");
+                let bk_name = filename.with_extension("bk");
+
+                fs::write(&tmp_name, formatted_text)?;
+                fs::rename(filename, bk_name)?;
+                fs::rename(tmp_name, filename)?;
+            }
+        }
+        EmitMode::Files => {
+            // Write text directly over original file if there is a diff.
+            let filename = filename_to_path();
+            let ori = fs::read_to_string(filename)?;
+            if ori != formatted_text {
+                fs::write(filename, formatted_text)?;
+            }
+        }
+        EmitMode::Stdout | EmitMode::Coverage => {
+            if config.verbose() != Verbosity::Quiet {
+                println!("{}:\n", filename);
+            }
+            write!(out, "{}", formatted_text)?;
+        }
+        EmitMode::ModifiedLines => {
+            let filename = filename_to_path();
+            let ori = fs::read_to_string(filename)?;
+            let mismatch = make_diff(&ori, formatted_text, 0);
+            let has_diff = !mismatch.is_empty();
+            output_modified(out, mismatch);
+            return Ok(has_diff);
+        }
+        EmitMode::Checkstyle => {
+            let filename = filename_to_path();
+            let ori = fs::read_to_string(filename)?;
+            let diff = make_diff(&ori, formatted_text, 3);
+            output_checkstyle_file(out, filename, diff)?;
+        }
+        EmitMode::Diff => {
+            let filename = filename_to_path();
+            let ori = fs::read_to_string(filename)?;
+            let mismatch = make_diff(&ori, formatted_text, 3);
+            let has_diff = !mismatch.is_empty();
+            print_diff(
+                mismatch,
+                |line_num| format!("Diff in {} at line {}:", filename.display(), line_num),
+                config,
+            );
+            return Ok(has_diff);
+        }
+    }
+
+    // when we are not in diff mode, don't indicate differing files
+    Ok(false)
+}