fix(git): disable GPG signatures for log/show commands (sindrets#540)

Add --no-show-signature flag to git log and show commands to prevent
GPG signature output from interfering with parsing. This fixes issues
when users have log.showSignature enabled in their git config.

Fixes sindrets#537

Author: Naxdy

lua/diffview/vcs/adapters/git/init.lua

@@ -267,11 +267,11 @@ end
 ---@param path string
 ---@param rev Rev?
 function GitAdapter:get_show_args(path, rev)
-  return utils.vec_join(self:args(), "show", fmt("%s:%s", rev and rev:object_name() or "", path))
+  return utils.vec_join(self:args(), "show", "--no-show-signature", fmt("%s:%s", rev and rev:object_name() or "", path))
 end
 
 function GitAdapter:get_log_args(args)
-  return utils.vec_join("log", "--first-parent", "--stat", args)
+  return utils.vec_join("log", "--no-show-signature", "--first-parent", "--stat", args)
 end
 
 function GitAdapter:get_dir(path)
@@ -311,14 +311,14 @@ function GitAdapter:get_merge_context()
   end
 
   local ret = {}
-  local out, code = self:exec_sync({ "show", "-s", "--pretty=format:%H%n%D", "HEAD", "--" }, self.ctx.toplevel)
+  local out, code = self:exec_sync({ "show", "-s", "--pretty=format:%H%n%D", "HEAD", "--no-show-signature", "--" }, self.ctx.toplevel)
 
   ret.ours = code ~= 0 and {} or {
     hash = out[1],
     ref_names = out[2],
   }
 
-  out, code = self:exec_sync({ "show", "-s", "--pretty=format:%H%n%D", their_head, "--" }, self.ctx.toplevel)
+  out, code = self:exec_sync({ "show", "-s", "--pretty=format:%H%n%D", their_head, "--no-show-signature", "--" }, self.ctx.toplevel)
 
   ret.theirs = code ~= 0 and {} or {
     hash = out[1],
@@ -330,7 +330,7 @@ function GitAdapter:get_merge_context()
 
   ret.base = {
     hash = out[1],
-    ref_names = self:exec_sync({ "show", "-s", "--pretty=format:%D", out[1] }, self.ctx.toplevel)[1],
+    ref_names = self:exec_sync({ "show", "-s", "--pretty=format:%D", out[1], "--no-show-signature" }, self.ctx.toplevel)[1],
   }
 
   return ret
@@ -570,6 +570,7 @@ function GitAdapter:stream_fh_data(state)
       "-c",
       "core.quotePath=false",
       "log",
+      "--no-show-signature",
       "--pretty=format:%x00%n" .. GitAdapter.COMMIT_PRETTY_FMT,
       "--numstat",
       "--raw",
@@ -649,6 +650,7 @@ function GitAdapter:stream_line_trace_data(state)
       "-c",
       "core.quotePath=false",
       "log",
+      "--no-show-signature",
       "--color=never",
       "--no-ext-diff",
       "--pretty=format:%x00%n" .. GitAdapter.COMMIT_PRETTY_FMT,
@@ -720,6 +722,7 @@ function GitAdapter:file_history_dry_run(log_opt)
   else
     cmd = utils.vec_join(
       "log",
+      "--no-show-signature",
       "--pretty=format:%H",
       "--name-status",
       options,
@@ -1036,6 +1039,7 @@ GitAdapter.fh_retry_commit = async.wrap(function(self, rev_arg, state, opt, call
       "--pretty=format:" .. GitAdapter.COMMIT_PRETTY_FMT,
       "--numstat",
       "--raw",
+      "--no-show-signature",
       "--diff-merges=" .. state.log_options.diff_merges,
       (state.single_file and state.log_options.follow) and "--follow" or nil,
       rev_arg,