--logo-source / --load-config: support path with env variables (*nix)

Author: CarterLi

CHANGELOG.md

@@ -38,6 +38,7 @@ Features:
 * Support yakuake terminal version & font detection (Terminal, Linux)
 * Add new option `--bright-color` which can be used to disable the default bright color of keys, title and ASCII logo.
 * Add module `Monitor` which prints physical parameters (native resolutions and demensions) of connected monitors
+* Support path with environment variables for `--logo-source` and `--load-config`.
 
 Bugfixes:
 * Fix possible hanging (TerminalFont, #493)

src/common/io/io_unix.c

@@ -6,6 +6,7 @@
 #include <termios.h>
 #include <poll.h>
 #include <dirent.h>
+#include <wordexp.h>
 
 static void createSubfolders(const char* fileName)
 {
@@ -109,7 +110,20 @@ bool ffPathExists(const char* path, FFPathType type)
 
 bool ffPathExpandEnv(const char* in, FFstrbuf* out)
 {
-    return false;
+    bool result = false;
+    wordexp_t exp;
+    if(wordexp(in, &exp, WRDE_NOCMD) != 0)
+        return false;
+
+    if (exp.we_wordc == 1)
+    {
+        result = true;
+        ffStrbufSetS(out, exp.we_wordv[0]);
+    }
+
+    wordfree(&exp);
+
+    return result;
 }
 
 const char* ffGetTerminalResponse(const char* request, const char* format, ...)

src/logo/logo.c

@@ -361,7 +361,7 @@ static bool logoPrintFileIfExists(bool doColorReplacement, bool raw)
 
     if(!ffAppendFileBuffer(options->source.chars, &content))
     {
-        fputs("Logo: Failed to load file content from logo source\n", stderr);
+        fprintf(stderr, "Logo: Failed to load file content from logo source: %s \n", options->source.chars);
         return false;
     }