meson: Add dependencies to perl modules to various script invocations

Eventually it is likely worth trying to deal with this in a more expansive
way, by generating dependency files generated within the scripts. But it's not
entirely obvious how to do that in perl and is work more suitable for 17
anyway.

Reported-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Reviewed-by: Tristan Partin <tristan@neon.tech>
Discussion: https://postgr.es/m/87v8g7s6bf.fsf@wibble.ilmari.org

meson.build

@@ -2681,6 +2681,20 @@ gen_export_kwargs = {
 
 
 
+###
+### Helpers for custom targets used across the tree
+###
+
+catalog_pm = files('src/backend/catalog/Catalog.pm')
+perfect_hash_pm = files('src/tools/PerfectHash.pm')
+gen_kwlist_deps = [perfect_hash_pm]
+gen_kwlist_cmd = [
+  perl, '-I', '@SOURCE_ROOT@/src/tools',
+  files('src/tools/gen_keywordlist.pl'),
+  '--output', '@OUTDIR@', '@INPUT@']
+
+
+
 ###
 ### windows resources related stuff
 ###

src/common/meson.build

@@ -54,8 +54,8 @@ endif
 common_kwlist = custom_target('kwlist',
   input: files('../include/parser/kwlist.h'),
   output: 'kwlist_d.h',
-  command: [perl, '-I', '@SOURCE_ROOT@/src/tools', files('../tools/gen_keywordlist.pl'),
-      '--extern', '--output', '@OUTDIR@', '@INPUT@'])
+  depend_files: gen_kwlist_deps,
+  command: [gen_kwlist_cmd, '--extern'])
 generated_sources += common_kwlist
 common_sources += common_kwlist
 

src/common/unicode/meson.build

@@ -28,6 +28,7 @@ update_unicode_targets += \
   custom_target('unicode_norm_table.h',
     input: [unicode_data['UnicodeData.txt'], unicode_data['CompositionExclusions.txt']],
     output: ['unicode_norm_table.h', 'unicode_norm_hashfunc.h'],
+    depend_files: perfect_hash_pm,
     command: [
       perl, files('generate-unicode_norm_table.pl'),
       '--outdir', '@OUTDIR@', '@INPUT@'],
@@ -38,6 +39,7 @@ update_unicode_targets += \
   custom_target('unicode_nonspacing_table.h',
     input: [unicode_data['UnicodeData.txt']],
     output: ['unicode_nonspacing_table.h'],
+    depend_files: perfect_hash_pm,
     command: [perl, files('generate-unicode_nonspacing_table.pl'), '@INPUT@'],
     build_by_default: false,
     capture: true,
@@ -56,6 +58,7 @@ update_unicode_targets += \
   custom_target('unicode_normprops_table.h',
     input: [unicode_data['DerivedNormalizationProps.txt']],
     output: ['unicode_normprops_table.h'],
+    depend_files: perfect_hash_pm,
     command: [perl, files('generate-unicode_normprops_table.pl'), '@INPUT@'],
     build_by_default: false,
     capture: true,

src/include/catalog/meson.build

@@ -111,7 +111,7 @@ generated_catalog_headers = custom_target('generated_catalog_headers',
   output: output_files,
   install_dir: output_install,
   input: input,
-  depend_files: bki_data_f,
+  depend_files: bki_data_f + catalog_pm,
   build_by_default: true,
   install: true,
   command: [

src/include/nodes/meson.build

@@ -50,6 +50,7 @@ node_support_install = [
 generated_nodes = custom_target('nodetags.h',
   input: node_support_input,
   output: node_support_output,
+  depend_files: catalog_pm,
   command: [
     perl, files('../../backend/nodes/gen_node_support.pl'),
     '-o', '@OUTDIR@',

src/include/utils/meson.build

@@ -44,6 +44,7 @@ fmgrtab_output = ['fmgroids.h', 'fmgrprotos.h', 'fmgrtab.c']
 fmgrtab_target = custom_target('fmgrtab',
   input: '../catalog/pg_proc.dat',
   output : fmgrtab_output,
+  depend_files: catalog_pm,
   command: [perl, '-I', '@SOURCE_ROOT@/src/backend/catalog/', files('../../backend/utils/Gen_fmgrtab.pl'), '--include-path=@SOURCE_ROOT@/src/include', '--output=@OUTDIR@', '@INPUT@'],
   install: true,
   install_dir: [dir_include_server / 'utils', dir_include_server / 'utils', false],

src/interfaces/ecpg/preproc/meson.build

@@ -69,14 +69,8 @@ c_kwlist = custom_target('c_kwlist_d.h',
   input: ['c_kwlist.h'],
   output: ['c_kwlist_d.h'],
   depends: check_rules,
-  command: [
-    perl,
-    '-I', '@SOURCE_ROOT@/src/tools',
-    '@SOURCE_ROOT@/src/tools/gen_keywordlist.pl',
-    '--output', '@OUTDIR@',
-    '--varname', 'ScanCKeywords',
-    '--no-case-fold', '@INPUT0@',
-  ],
+  depend_files: gen_kwlist_deps,
+  command: [gen_kwlist_cmd, '--varname', 'ScanCKeywords', '--no-case-fold'],
 )
 generated_sources += c_kwlist
 ecpg_sources += c_kwlist
@@ -84,13 +78,8 @@ ecpg_sources += c_kwlist
 ecpg_kwlist = custom_target('ecpg_kwlist_d.h',
   input: ['ecpg_kwlist.h'],
   output: ['ecpg_kwlist_d.h'],
-  command: [
-    perl, '-I',
-    '@SOURCE_ROOT@/src/tools',
-    '@SOURCE_ROOT@/src/tools/gen_keywordlist.pl',
-    '--output', '@OUTDIR@',
-    '--varname', 'ScanECPGKeywords', '@INPUT0@',
-  ]
+  depend_files: gen_kwlist_deps,
+  command: [gen_kwlist_cmd, '--varname', 'ScanECPGKeywords'],
 )
 generated_sources += ecpg_kwlist
 ecpg_sources += ecpg_kwlist

src/pl/plpgsql/src/meson.build

@@ -25,11 +25,11 @@ pl_errcodes = custom_target('plerrcodes',
 generated_sources += pl_errcodes
 plpgsql_sources += pl_errcodes
 
-gen_keywordlist = files('../../../../src/tools/gen_keywordlist.pl')
 pl_reserved = custom_target('pl_reserved_kwlist',
   input: ['pl_reserved_kwlist.h'],
   output: ['pl_reserved_kwlist_d.h'],
-  command: [perl, '-I', '@SOURCE_ROOT@/src/tools', gen_keywordlist, '--output', '@OUTDIR@', '--varname', 'ReservedPLKeywords', '@INPUT@']
+  depend_files: gen_kwlist_deps,
+  command: [gen_kwlist_cmd, '--varname', 'ReservedPLKeywords'],
 )
 generated_sources += pl_reserved
 plpgsql_sources += pl_reserved
@@ -37,7 +37,8 @@ plpgsql_sources += pl_reserved
 pl_unreserved = custom_target('pl_unreserved_kwlist',
   input: ['pl_unreserved_kwlist.h'],
   output: ['pl_unreserved_kwlist_d.h'],
-  command: [perl, '-I', '@SOURCE_ROOT@/src/tools', gen_keywordlist, '--output', '@OUTDIR@', '--varname', 'UnreservedPLKeywords', '@INPUT@']
+  depend_files: gen_kwlist_deps,
+  command: [gen_kwlist_cmd, '--varname', 'UnreservedPLKeywords'],
 )
 generated_sources += pl_unreserved
 plpgsql_sources += pl_unreserved