scripts: update UNRELEASED export map on release

To reduce the confusion where to put a new exported symbol, there is a
new UNRELEASED section with all the unreleased symbols. On release,
update the export map to the new release version and add back the
UNRELEASED section.

Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

scripts/release.sh

@@ -132,6 +132,111 @@ if [ "$build_doc" = true ]; then
     git commit -s -m "doc: Regenerate all docs for $VERSION"
 fi
 
+# update linker maps
+map_files=("src/libnvme.map" "src/libnvme-mi.map")
+lib_ver="LIBNVME_${ver//./_}"
+
+for map_file in "${map_files[@]}"; do
+    if [ ! -f "${map_file}" ]; then
+       continue
+    fi
+
+    # Check if LIBNVME_UNRELEASED has symbols
+    if ! awk '
+        $0 ~ /LIBNVME_UNRELEASED[[:space:]]*\{/ { in_section = 1; next }
+        in_section && $0 ~ /\}/ { exit }
+        in_section && $0 !~ /^[[:space:]]*($|\/|\/\*|\*|#)/ { found = 1; exit }
+        END { exit !found }
+    ' "${map_file}"; then
+        continue
+    fi
+
+    awk -v old="LIBNVME_UNRELEASED" -v new="${lib_ver}" '
+    BEGIN {
+        in_unreleased = 0
+        in_section = 0
+        count = 0
+        inserted = 0
+        header_lines = 0
+    }
+
+    function print_empty_unreleased() {
+        return old " {\n};\n"
+    }
+
+    function print_sorted_renamed() {
+        section = new " {\n\tglobal:"
+        n = asort(symbols, sorted)
+        for (i = 1; i <= n; i++) {
+            section = section "\n\t\t" sorted[i]
+        }
+        section = section "\n};"
+        return section
+    }
+
+    {
+        lines[++line_count] = $0
+
+        # Header detection (lines starting with #)
+        if (line_count == 1 || (header_lines && $0 ~ /^#/)) {
+            header_lines++
+        }
+
+        if (!in_unreleased && $0 ~ old "[[:space:]]*\\{") {
+            in_unreleased = 1
+            in_section = 1
+            unreleased_start = line_count
+            next
+        }
+
+        if (in_unreleased && in_section) {
+            if ($0 ~ /\}/) {
+                unreleased_end = line_count
+                in_section = 0
+                in_unreleased = 2
+                next
+            }
+
+            if ($0 ~ /^[[:space:]]*[a-zA-Z0-9_]+;/) {
+                sub(/^[[:space:]]*/, "", $0)
+                symbols[++count] = $0
+            }
+            next
+        }
+    }
+
+    END {
+        has_symbols = (count > 0)
+        if (has_symbols) {
+            renamed_section = print_sorted_renamed()
+        }
+        new_unreleased = print_empty_unreleased()
+
+        # First: print preserved header
+        for (i = 1; i <= header_lines; i++) {
+            print lines[i]
+        }
+
+        # Then: insert the new unreleased block
+        print new_unreleased
+
+        for (i = header_lines + 1; i <= line_count; i++) {
+            if (i == unreleased_start) {
+                i = unreleased_end
+                if (has_symbols) {
+                    print renamed_section
+                }
+                continue
+            }
+            print lines[i]
+        }
+    }
+    ' "${map_file}" > "${map_file}.tmp" && mv "${map_file}.tmp" "${map_file}"
+
+    git add "${map_file}"
+    echo "${map_file} updated."
+done
+
 # update meson.build
 sed -i -e "0,/[ \t]version: /s/\([ \t]version: \).*/\1\'$ver\',/" meson.build
 if [[ -n "$libnvme_VERSION" ]] && [[ -f subprojects/libnvme.wrap ]]; then