feat(post-install): add optional zram profile and metrics

2026-11-02 10:52:22 +00:00 · 2026-10-15 00:28:52 +01:00
parent f3add354e6
commit 51ed84f9b1
18 changed files with 783 additions and 3 deletions
@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+# Pure helpers shared by the ZRAM installer and its fixture tests.
+
+zram_render_generator_config() {
+    local algorithm=zstd
+    [[ "${1:-false}" == true ]] && algorithm='zstd(level=9)'
+    cat <<EOF
+# ProxMenux ZRAM profile
+[zram0]
+zram-size = ram / 10
+compression-algorithm = $algorithm
+swap-priority = 100
+EOF
+}
+
+zram_list_non_zram_swap() {
+    local swaps_file="$1" fstab_file="$2"
+    awk 'NR > 1 && $1 !~ /^\/dev\/zram[0-9]+$/ { print "active: " $1 }' "$swaps_file"
+    awk '$0 !~ /^[[:space:]]*#/ && NF >= 3 && $3 == "swap" && $1 !~ /^\/dev\/zram[0-9]+$/ { print "fstab: " $1 }' "$fstab_file"
+}
+
+zram_has_non_zram_swap() {
+    [[ -r "$1" && -r "$2" ]] || return 2
+    [[ -n "$(zram_list_non_zram_swap "$1" "$2")" ]]
+}
+
+# Print generator configuration outside this feature's dedicated drop-in.
+zram_foreign_generator_config() {
+    local owned_file="$1" fixture_root="${2:-}" root file
+    local roots=(/etc/systemd /run/systemd /usr/local/lib/systemd /usr/lib/systemd /lib/systemd)
+    if [[ -n "$fixture_root" ]]; then
+        roots=("$fixture_root/etc/systemd" "$fixture_root/run/systemd" "$fixture_root/usr/local/lib/systemd" "$fixture_root/usr/lib/systemd" "$fixture_root/lib/systemd")
+    fi
+    for root in "${roots[@]}"; do
+        for file in "$root/zram-generator.conf" "$root"/zram-generator.conf.d/*.conf; do
+            [[ -e "$file" || -L "$file" ]] || continue
+            [[ "$file" == "$owned_file" ]] && continue
+            # Ignore package defaults containing only comments, whitespace and
+            # section headers. Any directive or malformed active line is foreign.
+            if awk '
+                {
+                    line=$0
+                    sub(/^[[:space:]]+/, "", line)
+                    sub(/[[:space:]]+$/, "", line)
+                    if (line == "" || line ~ /^[#;]/ || line ~ /^\[[^]]+\]$/) next
+                    found=1
+                }
+                END { exit !found }
+            ' "$file"; then
+                printf '%s\n' "$file"
+            fi
+        done
+    done
+}
+
+zram_list_defined_systemd_swap_units() {
+    local fixture_root="${1:-}" root file
+    local roots=(/etc/systemd/system /run/systemd/system)
+    if [[ -n "$fixture_root" ]]; then
+        roots=("$fixture_root/etc/systemd/system" "$fixture_root/run/systemd/system")
+    fi
+    for root in "${roots[@]}"; do
+        [[ -d "$root" ]] || continue
+        while IFS= read -r file; do
+            # Files in these roots are administrator-defined units. The
+            # generator's own output lives under /run/systemd/generator and
+            # is intentionally outside this scan.
+            printf 'systemd: %s\n' "$file"
+        done < <(find "$root" -name '*.swap' \( -type f -o -type l \) -print 2>/dev/null)
+    done
+}