Merge branch 'wip/nielsdg/bash-completion' into 'master'

WIP: Add a Bash completion file

See merge request GNOME/gimp!266

etc/bash_completion.in

@@ -0,0 +1,90 @@
+__gimp()
+{
+    COMPREPLY=()
+    local current="${COMP_WORDS[COMP_CWORD]}"
+    local prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    # GIMP options, sorted alphabetically
+    #
+    # Note that we don't specify short options here, since they're quite unintuitive
+    options=(
+        "--as-new"
+        "--batch"
+        "--batch-interpreter"
+        "--console-messages"
+        "--debug-handlers"
+        "--dump-gimprc"
+        "--dump-gimprc-manpage"
+        "--dump-gimprc-system"
+        "--dump-pdb-procedures-deprecated"
+        "--g-fatal-warnings"
+        "--gimprc"
+        "--help"
+        "--help-all"
+        "--help-gegl"
+        "--help-gtk"
+        "--license"
+        "--new-instance"
+        "--no-cpu-accel"
+        "--no-data"
+        "--no-fonts"
+        "--no-interface"
+        "--no-shm"
+        "--no-splash"
+        "--pdb-compat-mode"
+        "--session"
+        "--show-playground"
+        "--stack-trace-mode"
+        "--system-gimprc"
+        "--verbose"
+        "--version"
+    )
+
+    #
+    # Different completions for specific options
+    #
+    case "${prev}" in
+        # Options that shouldn't be used in combination with something else
+        help | license | version)
+            return 0
+            ;;
+        # Expect a filename
+        gimprc | session | system-gimprc)
+            COMPREPLY=( $(compgen -f -- ${current}) )
+            return 0
+            ;;
+        # Expect *some* argument, so don't complete
+        b | batch | display)
+            return 0
+            ;;
+        batch-interpreter)
+            # FIXME: we should try to get the list of interpreters somehow
+            local interpreters=$(gimp --LIST_INTERPRETERS)
+            COMPREPLY=("python-fu-eval" "plug-in-script-fu-eval")
+            return 0
+            ;;
+        *)
+        ;;
+    esac
+
+   # Default: complete with either an option "-W" or a filename "-f"
+   COMPREPLY=($(compgen -W "${options[*]}" -f -- ${current}))
+   return 0
+}
+
+complete -F __gimp @GIMP_MAIN_EXE@
+if command -v @GIMP_SYMLINK1@ 2>&1 > /dev/null
+then
+  complete -F __gimp @GIMP_SYMLINK1@
+  complete -F __gimp @GIMP_SYMLINK2@
+fi
+
+if command -v @GIMP_CONSOLE_EXE@ 2>&1 > /dev/null
+then
+  complete -F __gimp @GIMP_CONSOLE_EXE@
+  if command -v @GIMP_CONSOLE_SYMLINK1@ 2>&1 > /dev/null
+  then
+    complete -F __gimp @GIMP_CONSOLE_SYMLINK1@
+    complete -F __gimp @GIMP_CONSOLE_SYMLINK2@
+  fi
+fi

etc/meson.build

@@ -19,3 +19,35 @@ install_data(
   ],
   install_dir: gimpsysconfdir,
 )
+
+# Bash completion
+have_bash = find_program('bash', required : false).found() # For completion scripts
+bash_comp_dep = dependency('bash-completion', version: '>=2.0', required: false)
+if have_bash
+
+  bash_comp_inst_dir = ''
+  if bash_comp_dep.found()
+    bash_comp_dir_override = bash_comp_dep.version().version_compare('>= 2.10') ? ['datadir', get_option('datadir')] : ['prefix', get_option('prefix')]
+    bash_comp_inst_dir = bash_comp_dep.get_variable('completionsdir', pkgconfig_define: bash_comp_dir_override)
+  endif
+
+  if bash_comp_inst_dir == ''
+    message('Found bash-completion but the .pc file did not set \'completionsdir\', fallback to a predefined path')
+    bash_comp_inst_dir = get_option('datadir') / 'bash-completion' / 'completions'
+  endif
+
+  bash_completion_conf = configuration_data()
+  bash_completion_conf.set('GIMP_MAIN_EXE', gimpmain_exe_name)
+  bash_completion_conf.set('GIMP_SYMLINK1', 'gimp-' + gimp_app_version_major.to_string())
+  bash_completion_conf.set('GIMP_SYMLINK2', 'gimp')
+
+  bash_completion_conf.set('GIMP_CONSOLE_EXE',      gimpconsole_exe_name)
+  bash_completion_conf.set('GIMP_CONSOLE_SYMLINK1', 'gimp-console-' + gimp_app_version_major.to_string())
+  bash_completion_conf.set('GIMP_CONSOLE_SYMLINK2', 'gimp-console')
+
+  configure_file(input : 'bash_completion.in',
+                 output: 'gimp-' + gimp_app_version,
+                 configuration: bash_completion_conf,
+                 install: true,
+                 install_dir: bash_comp_inst_dir)
+endif