TerminalShell: support oils and elvish

src/detection/terminalshell/terminalshell.c

@@ -128,6 +128,21 @@ static bool getShellVersionOksh(FFstrbuf* exe, FFstrbuf* version)
     return true;
 }
 
+static bool getShellVersionOils(FFstrbuf* exe, FFstrbuf* version)
+{
+    if(ffProcessAppendStdOut(version, (char* const[]) {
+        exe->chars,
+        "--version",
+        NULL
+    }) != NULL)
+        return false;
+
+    // Oils 0.18.0		https://www.oilshell.org/...
+    ffStrbufSubstrAfterFirstC(version, ' ');
+    ffStrbufSubstrBeforeFirstC(version, '\t');
+    return true;
+}
+
 static bool getShellVersionNushell(FFstrbuf* exe, FFstrbuf* version)
 {
     ffStrbufSetS(version, getenv("NU_VERSION"));
@@ -170,6 +185,10 @@ bool fftsGetShellVersion(FFstrbuf* exe, const char* exeName, FFstrbuf* version)
         return getShellVersionKsh(exe, version);
     if(strcasecmp(exeName, "oksh") == 0)
         return getShellVersionOksh(exe, version);
+    if(strcasecmp(exeName, "oil.ovm") == 0)
+        return getShellVersionOils(exe, version);
+    if(strcasecmp(exeName, "elvish") == 0)
+        return getExeVersionRaw(exe, version);
     if(strcasecmp(exeName, "python") == 0 && getenv("XONSH_VERSION"))
     {
         ffStrbufSetS(version, getenv("XONSH_VERSION"));

src/detection/terminalshell/terminalshell_linux.c

@@ -164,6 +164,8 @@ static void getTerminalShell(FFTerminalShellResult* result, pid_t pid)
         strcasecmp(name, "pwsh")      == 0 ||
         strcasecmp(name, "nu")        == 0 ||
         strcasecmp(name, "git-shell") == 0 ||
+        strcasecmp(name, "elvish")    == 0 ||
+        strcasecmp(name, "oil.ovm")   == 0 ||
         (strcasecmp(name, "python") == 0 && getenv("XONSH_VERSION"))
     ) {
         if (result->shellProcessName.length == 0)
@@ -355,6 +357,8 @@ const FFTerminalShellResult* ffDetectTerminalShell()
         ffStrbufInitStatic(&result.shellPrettyName, "nushell");
     else if(ffStrbufIgnCaseEqualS(&result.shellProcessName, "python") && getenv("XONSH_VERSION"))
         ffStrbufInitStatic(&result.shellPrettyName, "xonsh");
+    else if(ffStrbufIgnCaseEqualS(&result.shellProcessName, "oil.ovm"))
+        ffStrbufInitStatic(&result.shellPrettyName, "Oils");
     else
     {
         // https://github.com/fastfetch-cli/fastfetch/discussions/280#discussioncomment-3831734