aliases: Introduce git_parent and associated rebase aliases

.bash_aliases

@@ -90,6 +90,15 @@ alias cont='git rebase --continue'
 alias branch_clean='git branch --merged | egrep -v "(^\*|master|dev)" | xargs git branch -d'
 alias tag_clean='git tag -l | xargs git tag -d && git fetch -t'
 
+function git_parent {
+  git log --pretty=format:"%D" HEAD^  | \
+    grep -v "^$"                      | \
+    sed "s/, /\n/g"                   | \
+    grep -v "tag:[^,]*,*"             | \
+    head -n1                          | \
+    sed "s/origin\/\([^,]*\)/\1/"
+}
+
 alias log='git log --graph --decorate --oneline'
 
 # Branch
@@ -125,33 +134,43 @@ function grb {
   git rebase --interactive HEAD~$1
 }
 
-function grbm {
+function grbi {
   # Save current branch
   BRANCH=$(git branch | grep \* | cut -d ' ' -f2)
 
-  # Checkout master & pull
-  git checkout master
+  # Save parent branch
+  PARENT=$(git_parent)
+
+  # Checkout parent & pull
+  git checkout ${PARENT}
   git pull
 
+  echo "Rebasing on" ${PARENT}
+
   # Back to previous branch
   git checkout ${BRANCH}
-  git rebase --interactive master
+  git rebase --interactive ${PARENT}
 }
 
-function grbr {
+function grbroot {
   git rebase --interactive --autosquash --root
 }
 
-function gam {
-  git autofixup master
-  git rebase --interactive --autosquash master
-}
-
 function ga {
   git autofixup HEAD~$1
   git rebase --interactive --autosquash HEAD~$1
 }
 
+function gai {
+  # Save parent branch
+  PARENT=$(git_parent)
+
+  echo "Rebasing with autofixup on" ${PARENT}
+
+  git autofixup ${PARENT}
+  git rebase --interactive --autosquash ${PARENT}
+}
+
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