fix bug in lint.fish helper script

I just noticed that depending on the state of your working tree there can be
one or more spaces after the modification token and the file name. If there is
more than one space that causes the `string split` to produce unexpected
output.

build_tools/lint.fish

@@ -34,13 +34,8 @@ if test $all = yes
 else
     # We haven't been asked to lint all the source. If there are uncommitted
     # changes lint those, else lint the files in the most recent commit.
-    set pending (git status --porcelain --short --untracked-files=all | sed -e 's/^ *//')
-    if set -q pending[1]
-        # There are pending changes so lint those files.
-        for arg in $pending
-            set files $files (string split -m 1 ' ' $arg)[2]
-        end
-    else
+    set files (git status --porcelain --short --untracked-files=all | sed -e 's/^ *[^ ]* *//')
+    if not set -q files[1]
         # No pending changes so lint the files in the most recent commit.
         set files (git show --word-diff=porcelain --name-only --pretty=oneline head)[2..-1]
     end
@@ -56,10 +51,9 @@ if set -q c_files[1]
         echo ========================================
         echo Running cppcheck
         echo ========================================
-        # The stderr to stdout redirection is because cppcheck, incorrectly
-        # IMHO, writes its diagnostic messages to stderr. Anyone running
-        # this who wants to capture its output will expect those messages to be
-        # written to stdout.
+        # The stderr to stdout redirection is because cppcheck, incorrectly IMHO, writes its
+        # diagnostic messages to stderr. Anyone running this who wants to capture its output will
+        # expect those messages to be written to stdout.
         cppcheck -q --verbose --std=posix --std=c11 --language=c++ --template "[{file}:{line}]: {severity} ({id}): {message}" --suppress=missingIncludeSystem --inline-suppr --enable=$cppchecks $cppcheck_args $c_files 2>& 1
     end
 
@@ -68,10 +62,9 @@ if set -q c_files[1]
         echo ========================================
         echo Running oclint
         echo ========================================
-        # The stderr to stdout redirection is because oclint, incorrectly
-        # writes its final summary counts of the errors detected to stderr.
-        # Anyone running this who wants to capture its output will expect those
-        # messages to be written to stdout.
+        # The stderr to stdout redirection is because oclint, incorrectly writes its final summary
+        # counts of the errors detected to stderr. Anyone running this who wants to capture its
+        # output will expect those messages to be written to stdout.
         if test (uname -s) = "Darwin"
             if not test -f compile_commands.json
                 xcodebuild > xcodebuild.log

src/fish.cpp

@@ -92,39 +92,34 @@ extern "C" {
     int _NSGetExecutablePath(char* buf, uint32_t* bufsize);
 }
 
-/* Return the path to the current executable. This needs to be realpath'd. */
+// Return the path to the current executable. This needs to be realpath'd.
 static std::string get_executable_path(const char *argv0)
 {
-    char buff[PATH_MAX];
+    char buff[PATH_MAX + 1];
+
 #if __APPLE__
-    {
-        /* Returns 0 on success, -1 if the buffer is too small */
-        uint32_t buffSize = sizeof buff;
-        if (0 == _NSGetExecutablePath(buff, &buffSize))
-            return std::string(buff);
-
-        /* Loop until we're big enough */
-        char *mbuff = (char *)malloc(buffSize);
-        while (0 > _NSGetExecutablePath(mbuff, &buffSize))
-            mbuff = (char *)realloc(mbuff, buffSize);
-
-        /* Return the string */
-        std::string result = mbuff;
-        free(mbuff);
-        return result;
-    }
-#endif
-    {
-        /* On other Unixes, try /proc directory. This might be worth breaking out into macros. */
-        if (0 < readlink("/proc/self/exe", buff, sizeof buff) || // Linux
-                0 < readlink("/proc/curproc/file", buff, sizeof buff) || // BSD
-                0 < readlink("/proc/self/path/a.out", buff, sizeof buff)) // Solaris
-        {
-            return std::string(buff);
+    // On OS X use it's proprietary API to get the path to the executable.
+    uint32_t buffSize = sizeof buff;
+    if (_NSGetExecutablePath(buff, &buffSize) == 0) return std::string(buff);
+#else
+    // On non-OS X UNIXes, try /proc directory.
+    ssize_t len;
+    len = readlink("/proc/self/exe", buff, sizeof buff);  // Linux
+    if (len == -1) {
+        len = readlink("/proc/curproc/file", buff, sizeof buff);  // BSD
+        if (len == -1) {
+            len = readlink("/proc/self/path/a.out", buff, sizeof buff);  // Solaris
         }
     }
+    if (len > 0) {
+        buff[len] = '\0';
+        return std::string(buff);
+    }
+#endif
 
-    /* Just return argv0, which probably won't work (i.e. it's not an absolute path or a path relative to the working directory, but instead something the caller found via $PATH). We'll eventually fall back to the compile time paths. */
+    // Just return argv0, which probably won't work (i.e. it's not an absolute path or a path
+    // relative to the working directory, but instead something the caller found via $PATH). We'll
+    // eventually fall back to the compile time paths.
     return std::string(argv0 ? argv0 : "");
 }