Ticket #4203: support custom .zshrc.

Custom .zshrc file is  ~/.local/share/mc/.zshrc.

If ZDOTDIR environment variable is not set, set it to ~/.local/share/mc
if a .zshrc is found there. It is the only way to point zsh to an other
rc file than the default.

Thanks Sebastian Gniazdowski <sgniazdowski@gmail.com> for the original
patch.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

doc/man/mc.1.in

@@ -2465,7 +2465,10 @@ and special keyboard maps in ~/.local/share/mc/inputrc (fallback ~/.inputrc).
 .B ash/dash
 users (BusyBox or Debian) may specify startup commands in ~/.local/share/mc/ashrc (fallback ~/.profile).
 .PP
-.B tcsh, zsh, fish
+.B zsh
+users may specify startup commands in ~/.local/share/mc/.zshrc (fallback ~/.zshrc).
+.PP
+.B tcsh, fish
 users cannot specify mc-specific startup commands at present. They have to rely on
 shell-specific startup files.
 .PP

doc/man/ru/mc.1.in

@@ -2801,6 +2801,11 @@ subshell, в файле
 .B ~/.local/share/mc/bashrc
 и специальную карту раскладки клавиатуры в файле
 .BR ~/.local/share/mc/inputrc .
+Если вы используете
+.BR zsh ,
+можно указать команды, которые будут выполняться при запуске
+subshell, в файле
+.B ~/.local/share/mc/.zshrc .
 Пользователи
 .B tcsh
 могут задать выполняемые при запуске команды в файле

lib/fileloc.h

@@ -52,6 +52,7 @@
 #define MC_EXTFS_DIR            "extfs.d"
 
 #define MC_BASHRC_FILE          "bashrc"
+#define MC_ZSHRC_FILE           ".zshrc"
 #define MC_CONFIG_FILE          "ini"
 #define MC_FILEBIND_FILE        "mc.ext"
 #define MC_FILEPOS_FILE         "filepos"

lib/mcconfig/paths.c

@@ -77,6 +77,7 @@ static const struct
     { &mc_data_str, "ashrc" },
     { &mc_data_str, "bashrc" },
     { &mc_data_str, "inputrc" },
+    { &mc_data_str, MC_ZSHRC_FILE },
     { &mc_data_str, MC_EXTFS_DIR },
     { &mc_data_str, MC_HISTORY_FILE },
     { &mc_data_str, MC_FILEPOS_FILE },

src/subshell/common.c

@@ -97,6 +97,7 @@
 
 #include "lib/global.h"
 
+#include "lib/fileloc.h"
 #include "lib/unixcompat.h"
 #include "lib/tty/tty.h"        /* LINES */
 #include "lib/tty/key.h"        /* XCTRL */
@@ -370,9 +371,26 @@ init_subshell_child (const char *pty_name)
 
         break;
 
-        /* TODO: Find a way to pass initfile to TCSH, ZSH and FISH */
-    case SHELL_TCSH:
     case SHELL_ZSH:
+        /* ZDOTDIR environment variable is the only way to point zsh
+         * to an other rc file than the default. */
+
+        /* Don't overwrite $ZDOTDIR */
+        if (g_getenv ("ZDOTDIR") != NULL)
+        {
+            /* Do we have a custom init file ~/.local/share/mc/.zshrc?
+             * Otherwise use standard ~/.zshrc */
+            init_file = mc_config_get_full_path (MC_ZSHRC_FILE);
+            if (exist_file (init_file))
+            {
+                /* Set ZDOTDIR to ~/.local/share/mc */
+                g_setenv ("ZDOTDIR", mc_config_get_data_path (), TRUE);
+            }
+        }
+        break;
+
+        /* TODO: Find a way to pass initfile to TCSH and FISH */
+    case SHELL_TCSH:
     case SHELL_FISH:
         break;
 
@@ -416,7 +434,6 @@ init_subshell_child (const char *pty_name)
         /* Use -g to exclude cmds beginning with space from history
          * and -Z to use the line editor on non-interactive term */
         execl (mc_global.shell->path, "zsh", "-Z", "-g", (char *) NULL);
-
         break;
 
     case SHELL_ASH_BUSYBOX:

tests/lib/mcconfig/user_configs_path.c

@@ -134,37 +134,41 @@ static const struct test_user_config_paths_ds
     },
     { /* 14. */
         CONF_DATA,
-        MC_EXTFS_DIR
+        MC_ZSHRC_FILE
     },
     { /* 15. */
         CONF_DATA,
-        MC_HISTORY_FILE
+        MC_EXTFS_DIR
     },
     { /* 16. */
         CONF_DATA,
-        MC_FILEPOS_FILE
+        MC_HISTORY_FILE
     },
     { /* 17. */
         CONF_DATA,
-        EDIT_HOME_CLIP_FILE
+        MC_FILEPOS_FILE
     },
     { /* 18. */
         CONF_DATA,
-        MC_MACRO_FILE
+        EDIT_HOME_CLIP_FILE
     },
     { /* 19. */
-        CONF_CACHE,
-        "mc.log"
+        CONF_DATA,
+        MC_MACRO_FILE
     },
     { /* 20. */
         CONF_CACHE,
-        MC_TREESTORE_FILE
+        "mc.log"
     },
     { /* 21. */
         CONF_CACHE,
-        EDIT_HOME_TEMP_FILE
+        MC_TREESTORE_FILE
     },
     { /* 22. */
+        CONF_CACHE,
+        EDIT_HOME_TEMP_FILE
+    },
+    { /* 23. */
         CONF_CACHE,
         EDIT_HOME_BLOCK_FILE
     },