Add new pluging gitopen:open-from-commit (#178)

Given a git commit (default HEAD), open the files that are in the project and
part of this commit.

1 files changed, 53 insertions, 0 deletions

diff --git a/plugins/gitopen.lua b/plugins/gitopen.lua
new file mode 100644
index 0000000..4870191
--- /dev/null
+++ b/plugins/gitopen.lua
@@ -0,0 +1,53 @@
+-- mod-version:3
+local core = require "core"
+local command = require "core.command"
+local common = require "core.common"
+
+
+local function exec(cmd)
+  local proc = process.start(cmd)
+  while proc:running() do
+    coroutine.yield(0.1)
+  end
+  if proc:returncode() > 0 then
+    core.error("ERROR - command: " .. table.concat(cmd, " "))
+  end
+  return proc:read_stdout() or ""
+end
+
+
+local function git_find_files_and_open(commit)
+  local git_root = exec({"git", "rev-parse", "--show-toplevel"}):match( "^%s*(.-)%s*$" )
+  local file_list_str = exec({"git", "show", "--name-only", "--pretty=format:", commit})
+
+  local git_files = {}
+  for str in string.gmatch(file_list_str, "([^\n]+)") do
+    git_files[git_root .. PATHSEP .. str] = true
+  end
+
+  for dir, item in core.get_project_files() do
+    local key = dir .. PATHSEP .. item.filename
+    if git_files[key] then
+      core.root_view:open_doc(core.open_doc(item.filename))
+    end
+  end
+end
+
+-- works in any context
+command.add(nil, {
+  ["gitopen:open-from-commit"] = function(dv)
+    core.command_view:enter("Which commit? (default=HEAD)", {
+      submit = function(commit)
+        if commit == nil or commit == "" then
+          commit = "HEAD"
+        end
+        -- open the files in the background, return immediately
+        core.add_thread(
+          function ()
+            git_find_files_and_open(commit)
+          end
+        )
+      end
+    })
+  end,
+})