Consistently refer to a test's `revision` instead of `cfg`

Compiletest code sometimes refers to a test's revision as its `cfg`. This
results in two different names for the same thing, one of which is ambiguous
with other kinds of configuration (such as compiletest's own config).

This patch replaces those occurrences of `cfg` with `revision`.

4 files changed, 44 insertions, 41 deletions

diff --git a/src/tools/compiletest/src/errors.rs b/src/tools/compiletest/src/errors.rs
index e0ec76aa027..140c3aa0a64 100644
--- a/src/tools/compiletest/src/errors.rs
+++ b/src/tools/compiletest/src/errors.rs
@@ -72,9 +72,9 @@ enum WhichLine {
 /// and also //~^ ERROR message one for the preceding line, and
 ///          //~| ERROR message two for that same line.
 ///
-/// If cfg is not None (i.e., in an incremental test), then we look
-/// for `//[X]~` instead, where `X` is the current `cfg`.
-pub fn load_errors(testfile: &Path, cfg: Option<&str>) -> Vec<Error> {
+/// If revision is not None, then we look
+/// for `//[X]~` instead, where `X` is the current revision.
+pub fn load_errors(testfile: &Path, revision: Option<&str>) -> Vec<Error> {
     let rdr = BufReader::new(File::open(testfile).unwrap());
 
     // `last_nonfollow_error` tracks the most recently seen
@@ -90,7 +90,7 @@ pub fn load_errors(testfile: &Path, cfg: Option<&str>) -> Vec<Error> {
     rdr.lines()
         .enumerate()
         .filter_map(|(line_num, line)| {
-            parse_expected(last_nonfollow_error, line_num + 1, &line.unwrap(), cfg).map(
+            parse_expected(last_nonfollow_error, line_num + 1, &line.unwrap(), revision).map(
                 |(which, error)| {
                     match which {
                         FollowPrevious(_) => {}
@@ -108,24 +108,27 @@ fn parse_expected(
     last_nonfollow_error: Option<usize>,
     line_num: usize,
     line: &str,
-    cfg: Option<&str>,
+    test_revision: Option<&str>,
 ) -> Option<(WhichLine, Error)> {
     // Matches comments like:
     //     //~
     //     //~|
     //     //~^
     //     //~^^^^^
-    //     //[cfg1]~
-    //     //[cfg1,cfg2]~^^
+    //     //[rev1]~
+    //     //[rev1,rev2]~^^
     static RE: Lazy<Regex> =
-        Lazy::new(|| Regex::new(r"//(?:\[(?P<cfgs>[\w,]+)])?~(?P<adjust>\||\^*)").unwrap());
+        Lazy::new(|| Regex::new(r"//(?:\[(?P<revs>[\w,]+)])?~(?P<adjust>\||\^*)").unwrap());
 
     let captures = RE.captures(line)?;
 
-    match (cfg, captures.name("cfgs")) {
-        // Only error messages that contain our `cfg` between the square brackets apply to us.
-        (Some(cfg), Some(filter)) if !filter.as_str().split(',').any(|s| s == cfg) => return None,
-        (Some(_), Some(_)) => {}
+    match (test_revision, captures.name("revs")) {
+        // Only error messages that contain our revision between the square brackets apply to us.
+        (Some(test_revision), Some(revision_filters)) => {
+            if !revision_filters.as_str().split(',').any(|r| r == test_revision) {
+                return None;
+            }
+        }
 
         (None, Some(_)) => panic!("Only tests with revisions should use `//[X]~`"),
 
diff --git a/src/tools/compiletest/src/header.rs b/src/tools/compiletest/src/header.rs
index 0e013d64b4d..50e8cfd60a9 100644
--- a/src/tools/compiletest/src/header.rs
+++ b/src/tools/compiletest/src/header.rs
@@ -289,20 +289,20 @@ impl TestProps {
         }
     }
 
-    pub fn from_aux_file(&self, testfile: &Path, cfg: Option<&str>, config: &Config) -> Self {
+    pub fn from_aux_file(&self, testfile: &Path, revision: Option<&str>, config: &Config) -> Self {
         let mut props = TestProps::new();
 
         // copy over select properties to the aux build:
         props.incremental_dir = self.incremental_dir.clone();
         props.ignore_pass = true;
-        props.load_from(testfile, cfg, config);
+        props.load_from(testfile, revision, config);
 
         props
     }
 
-    pub fn from_file(testfile: &Path, cfg: Option<&str>, config: &Config) -> Self {
+    pub fn from_file(testfile: &Path, revision: Option<&str>, config: &Config) -> Self {
         let mut props = TestProps::new();
-        props.load_from(testfile, cfg, config);
+        props.load_from(testfile, revision, config);
 
         match (props.pass_mode, props.fail_mode) {
             (None, None) if config.mode == Mode::Ui => props.fail_mode = Some(FailMode::Check),
@@ -315,9 +315,9 @@ impl TestProps {
 
     /// Loads properties from `testfile` into `props`. If a property is
     /// tied to a particular revision `foo` (indicated by writing
-    /// `//[foo]`), then the property is ignored unless `cfg` is
+    /// `//@[foo]`), then the property is ignored unless `test_revision` is
     /// `Some("foo")`.
-    fn load_from(&mut self, testfile: &Path, cfg: Option<&str>, config: &Config) {
+    fn load_from(&mut self, testfile: &Path, test_revision: Option<&str>, config: &Config) {
         let mut has_edition = false;
         if !testfile.is_dir() {
             let file = File::open(testfile).unwrap();
@@ -331,7 +331,7 @@ impl TestProps {
                 testfile,
                 file,
                 &mut |HeaderLine { header_revision, directive: ln, .. }| {
-                    if header_revision.is_some() && header_revision != cfg {
+                    if header_revision.is_some() && header_revision != test_revision {
                         return;
                     }
 
@@ -455,7 +455,7 @@ impl TestProps {
                         &mut self.check_test_line_numbers_match,
                     );
 
-                    self.update_pass_mode(ln, cfg, config);
+                    self.update_pass_mode(ln, test_revision, config);
                     self.update_fail_mode(ln, config);
 
                     config.set_name_directive(ln, IGNORE_PASS, &mut self.ignore_pass);
@@ -645,7 +645,7 @@ impl TestProps {
     }
 }
 
-/// Extract a `(Option<line_config>, directive)` directive from a line if comment is present.
+/// Extract an `(Option<line_revision>, directive)` directive from a line if comment is present.
 ///
 /// See [`HeaderLine`] for a diagram.
 pub fn line_directive<'line>(
@@ -664,8 +664,8 @@ pub fn line_directive<'line>(
                 );
             };
 
-            let lncfg = &ln[1..close_brace];
-            Some((Some(lncfg), ln[(close_brace + 1)..].trim_start()))
+            let line_revision = &ln[1..close_brace];
+            Some((Some(line_revision), ln[(close_brace + 1)..].trim_start()))
         } else {
             Some((None, ln))
         }
@@ -1176,7 +1176,7 @@ pub fn make_test_description<R: Read>(
     name: test::TestName,
     path: &Path,
     src: R,
-    cfg: Option<&str>,
+    test_revision: Option<&str>,
     poisoned: &mut bool,
 ) -> test::TestDesc {
     let mut ignore = false;
@@ -1192,7 +1192,7 @@ pub fn make_test_description<R: Read>(
         path,
         src,
         &mut |HeaderLine { header_revision, original_line, directive: ln, line_number }| {
-            if header_revision.is_some() && header_revision != cfg {
+            if header_revision.is_some() && header_revision != test_revision {
                 return;
             }
 
diff --git a/src/tools/compiletest/src/header/tests.rs b/src/tools/compiletest/src/header/tests.rs
index 274006ae8c1..f76fb406cea 100644
--- a/src/tools/compiletest/src/header/tests.rs
+++ b/src/tools/compiletest/src/header/tests.rs
@@ -10,12 +10,19 @@ fn make_test_description<R: Read>(
     name: test::TestName,
     path: &Path,
     src: R,
-    cfg: Option<&str>,
+    revision: Option<&str>,
 ) -> test::TestDesc {
     let cache = HeadersCache::load(config);
     let mut poisoned = false;
-    let test =
-        crate::header::make_test_description(config, &cache, name, path, src, cfg, &mut poisoned);
+    let test = crate::header::make_test_description(
+        config,
+        &cache,
+        name,
+        path,
+        src,
+        revision,
+        &mut poisoned,
+    );
     if poisoned {
         panic!("poisoned!");
     }
diff --git a/src/tools/compiletest/src/lib.rs b/src/tools/compiletest/src/lib.rs
index 667358b1a6e..57a82eb37ed 100644
--- a/src/tools/compiletest/src/lib.rs
+++ b/src/tools/compiletest/src/lib.rs
@@ -745,7 +745,7 @@ fn make_test(
     let revisions = if early_props.revisions.is_empty() || config.mode == Mode::Incremental {
         vec![None]
     } else {
-        early_props.revisions.iter().map(Some).collect()
+        early_props.revisions.iter().map(|r| Some(r.as_str())).collect()
     };
 
     revisions
@@ -753,20 +753,13 @@ fn make_test(
         .map(|revision| {
             let src_file =
                 std::fs::File::open(&test_path).expect("open test file to parse ignores");
-            let cfg = revision.map(|v| &**v);
             let test_name = crate::make_test_name(&config, testpaths, revision);
             let mut desc = make_test_description(
-                &config, cache, test_name, &test_path, src_file, cfg, poisoned,
+                &config, cache, test_name, &test_path, src_file, revision, poisoned,
             );
             // Ignore tests that already run and are up to date with respect to inputs.
             if !config.force_rerun {
-                desc.ignore |= is_up_to_date(
-                    &config,
-                    testpaths,
-                    &early_props,
-                    revision.map(|s| s.as_str()),
-                    inputs,
-                );
+                desc.ignore |= is_up_to_date(&config, testpaths, &early_props, revision, inputs);
             }
             test::TestDescAndFn {
                 desc,
@@ -879,7 +872,7 @@ impl Stamp {
 fn make_test_name(
     config: &Config,
     testpaths: &TestPaths,
-    revision: Option<&String>,
+    revision: Option<&str>,
 ) -> test::TestName {
     // Print the name of the file, relative to the repository root.
     // `src_base` looks like `/path/to/rust/tests/ui`
@@ -907,11 +900,11 @@ fn make_test_name(
 fn make_test_closure(
     config: Arc<Config>,
     testpaths: &TestPaths,
-    revision: Option<&String>,
+    revision: Option<&str>,
 ) -> test::TestFn {
     let config = config.clone();
     let testpaths = testpaths.clone();
-    let revision = revision.cloned();
+    let revision = revision.map(str::to_owned);
     test::DynTestFn(Box::new(move || {
         runtest::run(config, &testpaths, revision.as_deref());
         Ok(())