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Speed up `which` by avoiding a loop
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index c2b6ff474644e75f9a2f3ab3d2435d18d9a065fa..11370f89e4e1c95da73b086653b56089021e8099 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # This program is licensed under the GNU GPL version 2 or later.
-# (c) Richard "RichiH" Hartmann <richih@debian.org>, 2011-2014
+# (c) Richard "RichiH" Hartmann <richih@debian.org>, 2011-2015
 # For details, see LICENSE. To submit patches, you have to agree to
 # license your code under the GNU GPL version 2 or later.
 
 # If '.git-HEAD' is appended to the version, you are seeing an unreleased
 # version of vcsh; the master branch is supposed to be clean at all times
 # so you can most likely just use it nonetheless
-VERSION='1.20141009'
+VERSION='1.20141026'
 SELF=$(basename $0)
 
 fatal() {
        echo "$SELF: fatal: $1" >&2
-       [ -z $2] && exit 1
+       [ -z $2 ] && exit 1
        exit $2
 }
 
@@ -100,7 +100,8 @@ help() {
    -v                   Enable verbose mode
 
    commands:
-   clone <remote> \\
+   clone [-b <branch>] \\
+         <remote> \\
          [<repo>]       Clone from an existing repository
    commit               Commit in all repositories
    delete <repo>        Delete an existing repository
@@ -108,9 +109,8 @@ help() {
    help                 Display this help text
    init <repo>          Initialize a new repository
    list                 List all repositories
-   list-tracked         List all files tracked by vcsh
-   list-tracked-by \\
-        <repo>          List files tracked by a repository
+   list-tracked \\
+        [<repo>]        List all files tracked all or one repositories
    list-untracked \\
         [<-r>] [<repo>] List all files not tracked by all or one repositories
    pull                 Pull from all vcsh remotes
@@ -119,7 +119,8 @@ help() {
           <newname>     Rename repository
    run <repo> \\
        <command>        Use this repository
-   status [<repo>]      Show statuses of all/one vcsh repositories
+   status \\
+     [--terse] [<repo>] Show statuses of all/one vcsh repositories
    upgrade <repo>       Upgrade repository to currently recommended settings
    version              Print version information
    which <substring>    Find substring in name of any tracked file
@@ -150,16 +151,17 @@ clone() {
        hook pre-clone
        init
        git remote add origin "$GIT_REMOTE"
-       git config branch.master.remote origin
-       git config branch.master.merge  refs/heads/master
-       VCSH_CLONE_ERROR=$(git ls-remote origin master 2>&1)
-       if [ -n "$VCSH_CLONE_ERROR" ]; then
-               rm -rf "$GIT_DIR"
-               fatal "$VCSH_CLONE_ERROR" 1
+       git checkout -b "$VCSH_BRANCH" || return $?
+       git config branch."$VCSH_BRANCH".remote origin
+       git config branch."$VCSH_BRANCH".merge  refs/heads/"$VCSH_BRANCH"
+       if [ $(git ls-remote origin "$VCSH_BRANCH" 2> /dev/null | wc -l ) -lt 1 ]; then
+               info "remote is empty, not merging anything.
+  You should add files to your new repository."
+               exit
        fi
-       git fetch
+       git fetch origin "$VCSH_BRANCH"
        hook pre-merge
-       git ls-tree -r --name-only origin/master | (while read object; do
+       git ls-tree -r --name-only origin/"$VCSH_BRANCH" | (while read object; do
                [ -e "$object" ] &&
                        error "'$object' exists." &&
                        VCSH_CONFLICT=1
@@ -167,7 +169,7 @@ clone() {
        [ x"$VCSH_CONFLICT" = x'1' ]) &&
                fatal "will stop after fetching and not try to merge!
   Once this situation has been resolved, run 'vcsh $VCSH_REPO_NAME pull' to finish cloning." 17
-       git merge origin/master
+       git merge origin/"$VCSH_BRANCH"
        hook post-merge
        hook post-clone
        retire
@@ -247,16 +249,22 @@ get_files() {
 }
 
 list_tracked() {
-       for VCSH_REPO_NAME in $(list); do
-               get_files
-       done | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
-           sed 's/[,\&]/\\&/g')," | sort -u
+       VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
+       if [ -n "$VCSH_REPO_NAME" ]; then
+               get_files | list_tracked_helper
+       else
+               for VCSH_REPO_NAME in $(list); do
+                       get_files
+               done | list_tracked_helper
+       fi
+}
+
+list_tracked_helper() {
+       sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | sed 's/[,\&]/\\&/g')," | sort -u
 }
 
 list_tracked_by() {
-       use
-       git ls-files | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
-           sed 's/[,\&]/\\&/g')," | sort -u
+       list_tracked $2
 }
 
 list_untracked() {
@@ -305,7 +313,7 @@ list_untracked_helper() {
                cp $temp_file_others $temp_file_untracked || fatal 'Could not copy temp file'
        fi
        cp $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not copy temp file'
-       comm -12 --nocheck-order $temp_file_others $temp_file_untracked_copy > $temp_file_untracked
+       comm -12 $temp_file_others $temp_file_untracked_copy > $temp_file_untracked
 }
 
 pull() {
@@ -360,21 +368,32 @@ run() {
 }
 
 status() {
+       if [ -t 1 ]; then
+               COLORING="-c color.status=always"
+       fi
        if [ -n "$VCSH_REPO_NAME" ]; then
                status_helper $VCSH_REPO_NAME
        else
                for VCSH_REPO_NAME in $(list); do
-                       echo "$VCSH_REPO_NAME:"
-                       status_helper $VCSH_REPO_NAME
-                       echo
+                       STATUS=$(status_helper $VCSH_REPO_NAME "$COLORING")
+                       [ -n "$STATUS" -o -z "$VCSH_STATUS_TERSE" ] && echo "$VCSH_REPO_NAME:"
+                       [ -n "$STATUS" ]            && echo "$STATUS"
+                       [ -z "$VCSH_STATUS_TERSE" ] && echo
                done
        fi
 }
 
 status_helper() {
-       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
+       GIT_DIR=$VCSH_REPO_D/$1.git; export GIT_DIR
+       VCSH_GIT_OPTIONS=$2
        use
-       git status --short --untracked-files='no'
+       remote_tracking_branch=$(git rev-parse --abbrev-ref --symbolic-full-name @{u} 2> /dev/null) && {
+               commits_behind=$(git log ..${remote_tracking_branch} --oneline | wc -l)
+               commits_ahead=$(git log ${remote_tracking_branch}.. --oneline | wc -l)
+               [ ${commits_behind} -ne 0 ] && echo "Behind $remote_tracking_branch by $commits_behind commits"
+               [ ${commits_ahead} -ne 0 ] && echo "Ahead of $remote_tracking_branch by $commits_ahead commits"
+       }
+       git ${VCSH_GIT_OPTIONS} status --short --untracked-files='no'
        VCSH_COMMAND_RETURN_CODE=$?
 }
 
@@ -408,9 +427,7 @@ use() {
 which() {
        [ -e "$VCSH_COMMAND_PARAMETER" ] || fatal "'$VCSH_COMMAND_PARAMETER' does not exist" 1
        for VCSH_REPO_NAME in $(list); do
-               for VCSH_FILE in $(get_files); do
-                       echo "$VCSH_FILE" | grep -q "$VCSH_COMMAND_PARAMETER" && echo "$VCSH_REPO_NAME: $VCSH_FILE"
-               done
+               get_files | grep -- "$VCSH_COMMAND_PARAMETER" | sed "s/^/$VCSH_REPO_NAME: /"
        done | sort -u
 }
 
@@ -486,11 +503,28 @@ case $VCSH_COMMAND in
 esac    
 
 if [ x"$VCSH_COMMAND" = x'clone' ]; then
+       VCSH_BRANCH=
+       if [ "$2" = -b ]; then
+               VCSH_BRANCH=$3
+               shift
+               shift
+       fi
        [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
        GIT_REMOTE="$2"
-       [ -n "$3" ] && VCSH_REPO_NAME=$3 || VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
+       [ -n "$VCSH_BRANCH" ] || if [ "$3" = -b ]; then
+               VCSH_BRANCH=$4
+               shift
+               shift
+       fi
+       if [ -n "$3" ]; then
+               VCSH_REPO_NAME=$3
+               [ -z "$VCSH_BRANCH" ] && [ "$4" = -b ] && VCSH_BRANCH=$5
+       else
+               VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
+       fi
        [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
        export VCSH_REPO_NAME
+       [ -n "$VCSH_BRANCH" ] || VCSH_BRANCH=master
        GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
 elif [ "$VCSH_COMMAND" = 'version' ]; then
        echo "$SELF $VERSION"
@@ -524,6 +558,10 @@ elif [ x"$VCSH_COMMAND" = x'commit' ] ||
      [ x"$VCSH_COMMAND" = x'push'   ]; then
        :
 elif [ x"$VCSH_COMMAND" = x'status' ]; then
+       if [ x"$2" = x'--terse' ]; then
+               VCSH_STATUS_TERSE=1; export VCSH_STATUS_TERSE
+               shift
+       fi
        VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
 elif [ -n "$2" ]; then
        VCSH_COMMAND='run'; export VCSH_COMMAND
@@ -568,6 +606,9 @@ check_dir "$VCSH_REPO_D"
 verbose "$VCSH_COMMAND begin"
 VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
 
+# Source repo-specific configuration file
+[ -r "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME" ] && . "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME"
+
 # source overlay functions
 for overlay in "$VCSH_OVERLAY_D/$VCSH_COMMAND"* "$VCSH_OVERLAY_D/$VCSH_REPO_NAME.$VCSH_COMMAND"*; do
        [ -r "$overlay" ] || continue