git-pull-all

#!/usr/bin/env bash

# TODO: Add --jobs argument to set parallel call concurrency

N_REPOS_UPDATED=0
N_REPOS_SKIPPED=0

INITIAL_PATH="$(pwd)"
INPUT_DIR="$*"

if [[ -z "$INPUT_DIR" ]]; then
  REPO_DIR="$(pwd)"
else
  REPO_DIR="$INPUT_DIR"
fi

if [[ ! -d "$REPO_DIR" ]]; then
  echo -e "${C_ERROR}Errror:${NC} ${C_DIR}$REPO_DIR${NC} ${C_ERROR}is not a directory${NC}"
  exit 1
fi

cd "$REPO_DIR" || exit 1

GIT_REPO_COUNT="$(find "$REPO_DIR" -maxdepth 1 -type d -exec test -e '{}/.git' ';' -print | wc -l)"
REPOS=()

for DIR in ./*; do
  if [[ -d "$DIR/.git" ]]; then
    REPOS+=("$DIR")
  fi
done

if [[ ${#REPOS[@]} -eq 0 ]]; then
  echo -e "${C_TEXT}No git repositories found in${NC} ${C_DIR}$REPO_DIR${NC}"
  cd "$INITIAL_PATH" || exit
  exit
else
  echo -e "${C_TEXT}Found${NC} ${C_NUMBER}$GIT_REPO_COUNT${NC} ${C_TEXT}git repositories in${NC} ${C_DIR}$REPO_DIR${NC} ${C_TEXT}to update...${NC}"
  echo ""
fi

export ARG_DIR=$DIR
export N_REPOS_UPDATED
export N_REPOS_SKIPPED

update_repo() {
  REPO="$1"

	if [[ ! -d "$ARG_DIR/.git" ]]; then
		return
	fi

  cd "$ARG_DIR" || exit 1

	ACTIVE_REMOTE="$(git rev-parse --abbrev-ref --symbolic-full-name @\{u\} | cut -d'/' -f1)"
	ACTIVE_BRANCH="$(git rev-parse --abbrev-ref HEAD)"

	if [[ -n "$(git status --porcelain)" ]]; then
    export N_REPOS_SKIPPED="$((N_REPOS_SKIPPED + 1)))"

		echo -e "${C_TEXT}-${NC} ${C_REPO}$REPO${NC} ${C_TEXT}has uncommitted changes, skipping...${NC}"
    cd ..
    return
	fi

  HASH_BEFORE="$(git rev-parse HEAD)"

  git pull --tags "$ACTIVE_REMOTE" "$ACTIVE_BRANCH" > /dev/null 2>&1

  HASH_AFTER="$(git rev-parse HEAD)"
  N_COMMITS="$(git rev-list --count "$HASH_BEFORE".."$HASH_AFTER")"

  if [[ "$HASH_BEFORE" != "$HASH_AFTER" ]]; then
    echo -e "${C_TEXT}-${NC} ${C_REPO}$REPO${NC}${C_TEXT}: pulled${NC} ${C_NUMBER}$N_COMMITS${NC} ${C_TEXT}new commits (branch${NC} ${C_TEXT_HIGHLIGHT}$ACTIVE_BRANCH${NC} ${C_TEXT}from${NC} ${C_TEXT_HIGHLIGHT}$ACTIVE_REMOTE${NC}${C_TEXT})${NC}"

    export N_REPOS_UPDATED="$((N_REPOS_UPDATED + 1))"
  else
    echo -e "${C_TEXT}-${NC} ${C_REPO}${REPO:2}${NC}${C_TEXT}: no changes${NC}"
  fi

  cd ..
}

export -f update_repo

parallel -j 20 update_repo ::: "${REPOS[@]}"

cd "$INITIAL_PATH" || exit 1

echo ""

if [[ -z $N_REPOS_UPDATED ]]; then
  echo -e "${C_TEXT}No repositories were updated${NC}"
else
  echo -e "${C_TEXT}Updated${NC} ${C_NUMBER}$N_REPOS_UPDATED${NC}${C_TEXT}, skipped${NC} ${C_NUMBER}$N_REPOS_SKIPPED${NC} ${C_TEXT}git repos.${NC}"
fi