Opening new buffer which is git show commit command

build_file.cpp

@@ -312,11 +312,18 @@ function MatchAgainstIncludes(s)
     return nil
 end
 
+function MatchGitCommit(s)
+    local command = "git --no-pager show "..s
+    return {kind = "exec", cmd = command, working_dir = GetCurrentBufferDir()}
+end
+
 Rules = {
     GenericTextFileRule,
     MatchAgainstIncludes,
+    MatchGitCommit,
 }
 
+
 function ApplyRules(s)
     for i = #Rules,1,-1 do
         rule = Rules[i]

src/basic/win32.cpp

@@ -421,11 +421,24 @@ StdoutPollInfo PollStdout(Process *process, char *buffer, int64_t buffer_size) {
     Assert(process->is_valid);
     Win32Process *p = (Win32Process *)process->platform;
 
-    DWORD bytes_read  = 0;
     DWORD bytes_avail = 0;
 
-    bool peek_error = PeekNamedPipe(p->child_stdout_read, buffer, (DWORD)buffer_size, &bytes_read, &bytes_avail, NULL) == 0;
+    StdoutPollInfo result     = {};
+    bool           peek_error = PeekNamedPipe(p->child_stdout_read, NULL, 0, NULL, &bytes_avail, NULL) == 0;
+    if (peek_error) {
+        return result;
+    }
 
-    StdoutPollInfo result = {bytes_read, bytes_avail};
+    if (bytes_avail == 0) {
+        return result;
+    }
+
+    DWORD bytes_read = 0;
+    bool  read_error = ReadFile(p->child_stdout_read, buffer, (DWORD)buffer_size, &bytes_read, 0) == 0;
+    if (read_error) {
+        return result;
+    }
+
+    result = {bytes_read, bytes_avail - bytes_read};
     return result;
 }

src/text_editor/commands.cpp

@@ -456,12 +456,12 @@ View *FindView(BufferID buffer_id) {
     return NULL;
 }
 
-void Command_Append(ViewID view_id, String16 string) {
+void Command_Append(ViewID view_id, String16 string, bool scroll_to_end_if_cursor_on_last_line) {
     View   *view   = GetView(view_id);
     Buffer *buffer = GetBuffer(view->active_buffer);
 
     bool scroll_to_end = false;
-    if (view) {
+    if (scroll_to_end_if_cursor_on_last_line) {
         Int line = PosToLine(*buffer, GetFront(view->carets[0]));
         if (line == buffer->line_starts.len - 1) scroll_to_end = true;
     }
@@ -484,30 +484,29 @@ void Command_Append(ViewID view_id, String16 string) {
     }
 }
 
-void Command_Append(ViewID view_id, String string) {
+void Command_Append(ViewID view_id, String string, bool scroll_to_end_if_cursor_on_last_line) {
     Scratch  scratch;
     String16 string16 = ToString16(scratch, string);
-    Command_Append(view_id, string16);
+    Command_Append(view_id, string16, scroll_to_end_if_cursor_on_last_line);
 }
 
 void ReportErrorf(const char *fmt, ...) {
     Scratch scratch;
     STRING_FORMAT(scratch, fmt, string);
     SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error!", string.data, NULL);
-    Command_Append(ConsoleViewID, string);
+    Command_Append(ConsoleViewID, string, true);
 }
 
 void ReportConsolef(const char *fmt, ...) {
     Scratch scratch;
     STRING_FORMAT(scratch, fmt, string);
-    Command_Append(ConsoleViewID, string);
+    Command_Append(ConsoleViewID, string, true);
 }
 
 void ReportWarningf(const char *fmt, ...) {
     Scratch scratch;
     STRING_FORMAT(scratch, fmt, string);
-    String16 string16 = ToString16(scratch, string);
-    Command_Append(ConsoleViewID, string16);
+    Command_Append(ConsoleViewID, string, true);
     SetVisibility(ConsoleWindowID, true);
     SetActiveWindow(ConsoleWindowID);
 }

src/text_editor/generated.cpp

@@ -204,11 +204,18 @@ function MatchAgainstIncludes(s)
     return nil
 end
 
+function MatchGitCommit(s)
+    local command = "git --no-pager show "..s
+    return {kind = "exec", cmd = command, working_dir = GetCurrentBufferDir()}
+end
+
 Rules = {
     GenericTextFileRule,
     MatchAgainstIncludes,
+    MatchGitCommit,
 }
 
+
 function ApplyRules(s)
     for i = #Rules,1,-1 do
         rule = Rules[i]

src/text_editor/lua_api.cpp

@@ -57,6 +57,19 @@ void Open(String path) {
         }
         UpdateScroll(window, true);
         SetActiveWindow(window->id);
+    } else if (FieldString(LuaState, "kind") == "exec") {
+        String cmd         = FieldString(LuaState, "cmd");
+        String working_dir = FieldString(LuaState, "working_dir");
+        String asd         = "asd";
+        String buffer_name = Format(scratch, "%.*s/%.*s", FmtString(working_dir), FmtString(asd));
+
+        CheckpointBeforeGoto();
+        Window *window  = GetWindow(GetLastActiveWindow());
+        View   *view    = WindowOpenBufferView(window, buffer_name);
+        Buffer *buffer  = GetBuffer(view->active_buffer);
+        view->carets[0] = MakeCaret({});
+        Exec(view->id, cmd, working_dir);
+        SetActiveWindow(window->id);
     } else {
         ReportWarningf("Failed to match any of ApplyRules results!");
     }
@@ -80,7 +93,7 @@ int LuaPrint(lua_State *L) {
     Scratch scratch;
     String  string = luaL_checkstring(L, 1);
     lua_pop(L, 1);
-    Command_Append(ConsoleViewID, string);
+    Command_Append(ConsoleViewID, string, true);
     return 0;
 }
 

src/text_editor/process.cpp

@@ -21,7 +21,7 @@ void UpdateProcesses() {
         StdoutPollInfo info    = PollStdout(&it, buffer, buffer_size);
         String         string  = {buffer, info.size_read};
         ViewID         view_id = {it.view_id};
-        if (string.len) Command_Append(view_id, string);
+        if (string.len) Command_Append(view_id, string, false);
 
         bool exited = PollExitCode(&it);
         if (exited) remove_item = true;

src/text_editor/text_editor.h

@@ -124,8 +124,8 @@ void     UpdateScroll(Window *window, bool update_caret_scrolling);
 void Command_SelectEntireBuffer(View *view);
 void Command_Replace(View *view, String16 string);
 void Command_SelectRangeOneCursor(View *view, Range range);
-void Command_Append(ViewID view_id, String16 string);
-void Command_Append(ViewID view_id, String string);
+void Command_Append(ViewID view_id, String16 string, bool scroll_to_end_if_cursor_on_last_line);
+void Command_Append(ViewID view_id, String string, bool scroll_to_end_if_cursor_on_last_line);
 
 void ReportErrorf(const char *fmt, ...);
 void ReportWarningf(const char *fmt, ...);

src/text_editor/todo.txt

@@ -1,5 +1,5 @@
 - I guess it's pretty dangerous passing pointers everywhere?
-- Attach BufferID to process, append to that buffer
+- kill process using command in window
 - kill all processes on exit https://devblogs.microsoft.com/oldnewthing/20131209-00/?p=2433
 - if exec is prepended with '!' symbol then run a shell command
 - Open git commit as part of "Open" in new buffer using git --no-pager show <hash>