fix: dont' misundentify nightly as stable in --version on Mac&Win

We used to set `--nightly` in CI, and only for linux. Let's detect this
in xtask instead.

.github/workflows/release.yaml

@@ -109,12 +109,7 @@ jobs:
         node-version: 12.x
 
     - name: Dist
-      if: github.ref == 'refs/heads/release'
-      run: cargo xtask dist --client 0.2.$GITHUB_RUN_NUMBER
-
-    - name: Dist
-      if: github.ref != 'refs/heads/release'
-      run: cargo xtask dist --nightly --client 0.3.$GITHUB_RUN_NUMBER-nightly
+      run: cargo xtask dist --client-patch-version $GITHUB_RUN_NUMBER
 
     - name: Run analysis-stats on rust-analyzer
       run: target/${{ env.RA_TARGET }}/release/rust-analyzer analysis-stats .

xtask/src/dist.rs

@@ -9,24 +9,28 @@ use anyhow::Result;
 use flate2::{write::GzEncoder, Compression};
 use xshell::{cmd, cp, mkdir_p, pushd, pushenv, read_file, rm_rf, write_file};
 
-use crate::{date_iso, project_root};
+use crate::{date_iso, flags, project_root};
 
-pub(crate) struct DistCmd {
-    pub(crate) nightly: bool,
-    pub(crate) client_version: Option<String>,
-}
-
-impl DistCmd {
+impl flags::Dist {
     pub(crate) fn run(self) -> Result<()> {
+        let stable =
+            std::env::var("GITHUB_REF").unwrap_or_default().as_str() == "refs/heads/release";
+
         let dist = project_root().join("dist");
         rm_rf(&dist)?;
         mkdir_p(&dist)?;
 
-        if let Some(version) = self.client_version {
-            let release_tag = if self.nightly { "nightly".to_string() } else { date_iso()? };
+        if let Some(patch_version) = self.client_patch_version {
+            let version = if stable {
+                format!("0.2.{}", patch_version)
+            } else {
+                // A hack to make VS Code prefer nightly over stable.
+                format!("0.3.{}", patch_version)
+            };
+            let release_tag = if stable { date_iso()? } else { "nightly".to_string() };
             dist_client(&version, &release_tag)?;
         }
-        let release_channel = if self.nightly { "nightly" } else { "stable" };
+        let release_channel = if stable { "stable" } else { "nightly" };
         dist_server(release_channel)?;
         Ok(())
     }

xtask/src/flags.rs

@@ -37,8 +37,7 @@ xflags::xflags! {
             optional --dry-run
         }
         cmd dist {
-            optional --nightly
-            optional --client version: String
+            optional --client-patch-version version: String
         }
         cmd metrics {
             optional --dry-run
@@ -85,9 +84,6 @@ pub struct Install {
     pub jemalloc: bool,
 }
 
-#[derive(Debug)]
-pub struct Lint;
-
 #[derive(Debug)]
 pub struct FuzzTests;
 
@@ -106,8 +102,7 @@ pub struct Promote {
 
 #[derive(Debug)]
 pub struct Dist {
-    pub nightly: bool,
-    pub client: Option<String>,
+    pub client_patch_version: Option<String>,
 }
 
 #[derive(Debug)]

xtask/src/main.rs

@@ -28,8 +28,6 @@ use std::{
 use walkdir::{DirEntry, WalkDir};
 use xshell::{cmd, cp, pushd, pushenv};
 
-use crate::dist::DistCmd;
-
 fn main() -> Result<()> {
     let _d = pushd(project_root())?;
 
@@ -44,9 +42,7 @@ fn main() -> Result<()> {
         flags::XtaskCmd::PreCache(cmd) => cmd.run(),
         flags::XtaskCmd::Release(cmd) => cmd.run(),
         flags::XtaskCmd::Promote(cmd) => cmd.run(),
-        flags::XtaskCmd::Dist(flags) => {
-            DistCmd { nightly: flags.nightly, client_version: flags.client }.run()
-        }
+        flags::XtaskCmd::Dist(cmd) => cmd.run(),
         flags::XtaskCmd::Metrics(cmd) => cmd.run(),
         flags::XtaskCmd::Bb(cmd) => {
             {