add ability to specifiy commit ref

1 files changed, 23 insertions, 5 deletions

diff --git a/lua/dep.lua b/lua/dep.lua
index 378ef82..911ceca 100644
--- a/lua/dep.lua
+++ b/lua/dep.lua
@@ -78,6 +78,7 @@ local function register(spec, overrides)
   package.url = spec.url or package.url or ("https://github.com/" .. id .. ".git")
   package.branch = spec.branch or package.branch
   package.dir = base_dir .. package.name
+  package.commit = spec.commit
   package.pin = overrides.pin or spec.pin or package.pin
   package.enabled = not overrides.disable and not spec.disable and package.enabled
 
@@ -493,7 +494,7 @@ local function sync(package, cb)
         log_err(before)
         cb(err)
       else
-        proc.git_fetch(package.dir, "origin", package.branch or "HEAD", function(err, message)
+        local function continue(err, message)
           if err then
             log_err(message)
             cb(err)
@@ -519,7 +520,12 @@ local function sync(package, cb)
               end
             end)
           end
-        end)
+        end
+        if package.commit then
+          proc.git_checkout(package.dir, package.branch, package.commit, continue)
+        else
+          proc.git_fetch(package.dir, "origin", package.branch or "HEAD", continue)
+        end
       end
     end)
   else
@@ -527,9 +533,21 @@ local function sync(package, cb)
       if err then
         logger:log("error", string.format("failed to install %s; reason: %s", package.id, message))
       else
-        package.exists = true
-        mark_reconfigure(package)
-        logger:log("install", string.format("installed %s", package.id))
+        if package.commit then
+          proc.git_checkout(package.dir, package.branch, package.commit, function(err, message)
+            if err then
+              logger:log("error", string.format("failed to checkout %s; reason: %s", package.id, message))
+            else
+              package.exists = true
+              mark_reconfigure(package)
+              logger:log("install", string.format("installed %s", package.id))
+            end
+          end)
+        else
+          package.exists = true
+          mark_reconfigure(package)
+          logger:log("install", string.format("installed %s", package.id))
+        end
       end
 
       cb(err)