add error if no db lib found, add better ci build and test

.woodpecker/build.yaml

@@ -6,7 +6,7 @@ labels:
   platform: ${platform}
     
 steps:
-  build-n-test:
+  build-berkeley:
     when:
       event: [push]
     image: alpine:latest
@@ -15,3 +15,17 @@ steps:
       - apk add --no-cache bash build-base words-en gdb perl pcre2 pcre2-dev db db-dev pkgconfig meson ninja
       - meson setup --reconfigure build
       - ninja -C build
+      - build/dbtool -d test.db -i -k "test" -v "blah blah blah"
+      - build/dbtool -d test.db -D | grep blah
+
+  build-gdbm:
+    when:
+      event: [push]
+    image: alpine:latest
+    commands:
+      - apk update
+      - apk add --no-cache bash build-base words-en gdb perl pcre2 pcre2-dev gdbm gdbm-dev pkgconfig meson ninja
+      - meson setup --reconfigure build
+      - ninja -C build
+      - build/dbtool -d test.db -i -k "test" -v "blah blah blah"
+      - build/dbtool -d test.db -D | grep blah

meson.build

@@ -46,15 +46,19 @@ pcre2 = dependency('libpcre2-8')
 
 
 # manually check for libraries
-lib_berkeley = cpp.find_library('db_cxx',
+lib_berkeley = cpp.find_library('db_cxx', required: false,
                dirs : ['/usr', '/usr/local'])
 inc_berkeley = include_directories('/usr', '/usr/local')
 
-lib_gdbm = cpp.find_library('gdbm',
+lib_gdbm = cpp.find_library('gdbm', required: false,
                dirs : ['/usr', '/usr/local'])
 inc_gdbm = include_directories('/usr', '/usr/local')
 
 
+if not lib_gdbm.found() and not lib_berkeley.found()
+  error('neither GDBM nor BerkeleyDB are installed')
+endif
+
 # check commandline options
 prefix = get_option('prefix')