ci: bundled xlings pin 0.4.67 -> 0.4.68 (per-repo index artifact); align kXlingsVersion

0.4.68 (openxlings/xlings#377/#379/#380) lets custom index_repos entries
declare an artifact source with git fallback — the feature #269 adopts.
Older xlings ignores the new fields, so this bump is the benefit switch,
not a correctness prerequisite. kXlingsVersion was stale at 0.4.51 with
no consumer; align it and print it from `mcpp self env` so the constant
can't silently drift again.

Author: Sunrisepeak

.github/workflows/ci-linux-e2e.yml

@@ -123,7 +123,7 @@ jobs:
 
       - name: Bootstrap xlings + released mcpp
         run: |
-          curl -fsSL https://raw.githubusercontent.com/openxlings/xlings/main/tools/other/quick_install.sh | bash -s v0.4.67
+          curl -fsSL https://raw.githubusercontent.com/openxlings/xlings/main/tools/other/quick_install.sh | bash -s v0.4.68
           export PATH="$HOME/.xlings/subos/current/bin:$PATH"
           xlings update
           xlings install mcpp -y -g

.github/workflows/cross-build-test.yml

@@ -92,17 +92,17 @@ jobs:
       - name: Bootstrap mcpp via xlings
         env:
           XLINGS_NON_INTERACTIVE: '1'
-          # 0.4.67 (current) — kept in lock-step with the xlings the release
-          # is built/bundled against (release.yml). Bumped 0.4.62 -> 0.4.67 for
-          # mcpp#238: xlings 0.4.67 carries the multi-index_repo install fix
-          # (openxlings/xlings#374, commit cf9b60d5) so a workspace member with
-          # >=2 inherited index_repos installs uncached packages instead of
-          # failing silently. A past 0.4.61 "download 404
+          # 0.4.68 (current) — kept in lock-step with the xlings the release
+          # is built/bundled against (release.yml). 0.4.67 carried the
+          # multi-index_repo install fix (openxlings/xlings#374); 0.4.68 adds
+          # per-repo index artifact sources (openxlings/xlings#377) so the
+          # mcpplibs index syncs via artifact with git as fallback (mcpp#269).
+          # A past 0.4.61 "download 404
           # for mcpp@<pin>" was NOT a version bug — the xlings-res/mcpp GitHub
           # release assets were uploaded in a broken state (records present,
           # blobs missing → 404 on GET); re-uploaded clean. The stale-INDEX
           # half is handled by the marker-clear below.
-          XLINGS_VERSION: '0.4.67'
+          XLINGS_VERSION: '0.4.68'
         run: |
           tarball="xlings-${XLINGS_VERSION}-linux-x86_64.tar.gz"
           curl -fsSL -o "/tmp/${tarball}" \
@@ -215,7 +215,7 @@ jobs:
       - name: Bootstrap mcpp via xlings
         env:
           XLINGS_NON_INTERACTIVE: '1'
-          XLINGS_VERSION: '0.4.67'
+          XLINGS_VERSION: '0.4.68'
         run: |
           tarball="xlings-${XLINGS_VERSION}-linux-x86_64.tar.gz"
           curl -fsSL -o "/tmp/${tarball}" \

.github/workflows/release.yml

@@ -96,7 +96,7 @@ jobs:
           # Pin xlings to a known-good version. The upstream install
           # script always grabs `latest` (no version override), so we
           # download + self-install manually to avoid broken releases.
-          XLINGS_VERSION: '0.4.67'
+          XLINGS_VERSION: '0.4.68'
         run: |
           if [ ! -x "$HOME/.xlings/subos/default/bin/xlings" ]; then
             tarball="xlings-${XLINGS_VERSION}-linux-x86_64.tar.gz"
@@ -278,10 +278,10 @@ jobs:
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
           echo "tag=v$VERSION"    >> "$GITHUB_OUTPUT"
 
-      - name: Bootstrap mcpp via xlings (latest 0.4.67)
+      - name: Bootstrap mcpp via xlings (latest 0.4.68)
         env:
           XLINGS_NON_INTERACTIVE: '1'
-          XLINGS_VERSION: '0.4.67'
+          XLINGS_VERSION: '0.4.68'
         run: |
           tarball="xlings-${XLINGS_VERSION}-linux-x86_64.tar.gz"
           curl -fsSL -o "/tmp/${tarball}" \
@@ -336,13 +336,13 @@ jobs:
           exec "$(dirname "$0")/bin/mcpp" "$@"
           LAUNCHER
           chmod +x "$STAGING/$WRAPPER/mcpp"
-          # Bundle the aarch64 xlings (0.4.67) so install.sh consumers on aarch64
+          # Bundle the aarch64 xlings (0.4.68) so install.sh consumers on aarch64
           # get an aarch64 xlings, not the x86_64 bootstrap one.
-          XLA="xlings-0.4.67-linux-aarch64.tar.gz"
+          XLA="xlings-0.4.68-linux-aarch64.tar.gz"
           if curl -fsSL -o "/tmp/$XLA" \
-               "https://github.com/openxlings/xlings/releases/download/v0.4.67/$XLA"; then
+               "https://github.com/openxlings/xlings/releases/download/v0.4.68/$XLA"; then
             tar -xzf "/tmp/$XLA" -C /tmp
-            XLBIN=$(find /tmp/xlings-0.4.67-linux-aarch64 -path '*/bin/xlings' -type f | head -1)
+            XLBIN=$(find /tmp/xlings-0.4.68-linux-aarch64 -path '*/bin/xlings' -type f | head -1)
             if [ -n "$XLBIN" ]; then
               mkdir -p "$STAGING/$WRAPPER/registry/bin"
               cp "$XLBIN" "$STAGING/$WRAPPER/registry/bin/xlings"
@@ -417,7 +417,7 @@ jobs:
       - name: Bootstrap mcpp via xlings
         env:
           XLINGS_NON_INTERACTIVE: '1'
-          XLINGS_VERSION: '0.4.67'
+          XLINGS_VERSION: '0.4.68'
         run: |
           if [ ! -x "$HOME/.xlings/subos/default/bin/xlings" ]; then
             WORK=$(mktemp -d)
@@ -599,7 +599,7 @@ jobs:
         shell: bash
         env:
           XLINGS_NON_INTERACTIVE: '1'
-          XLINGS_VERSION: '0.4.67'
+          XLINGS_VERSION: '0.4.68'
         run: |
           WORK=$(mktemp -d)
           zipfile="xlings-${XLINGS_VERSION}-windows-x86_64.zip"

src/config.cppm

@@ -695,6 +695,7 @@ std::expected<GlobalConfig, ConfigError> load_or_init(
 void print_env(const GlobalConfig& cfg) {
     std::println("MCPP_HOME           = {}", cfg.mcppHome.string());
     std::println("xlings binary       = {}", cfg.xlingsBinary.string());
+    std::println("xlings pinned       = {}", kXlingsPinnedVersion);
     std::println("xlings home         = {}", cfg.xlingsHome().string());
     std::println("config              = {}", cfg.configFile.string());
     std::println("BMI cache           = {}", cfg.bmiCacheDir.string());

src/xlings.cppm

@@ -33,7 +33,10 @@ struct Env {
 namespace pinned {
     inline constexpr std::string_view kPatchelfVersion = "0.18.0";
     inline constexpr std::string_view kNinjaVersion    = "1.12.1";
-    inline constexpr std::string_view kXlingsVersion   = "0.4.51";
+    // Keep in lock-step with the XLINGS_VERSION pins in release.yml /
+    // cross-build-test.yml / ci-linux-e2e.yml (the xlings actually bundled
+    // into releases). Printed by `mcpp self env`.
+    inline constexpr std::string_view kXlingsVersion   = "0.4.68";
     inline constexpr std::string_view kNasmVersion     = "3.02";
 }