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vcsh: Implement skeleton of `vcsh foreach`
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index e4f6f33dc2779ff1bd08c5f20c79dd04ec26845f..a5c3f487c0707ad6ddc2cda61e37967dd4e776b2 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -19,18 +19,19 @@
 # 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
 # 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: $1" >&2
 SELF=$(basename $0)
 
 fatal() {
        echo "$SELF: fatal: $1" >&2
+       [ -z $2 ] && exit 1
        exit $2
 }
 
 # We need to run getops as soon as possible so we catch -d and other
 # options that will modify our behaviour.
 # Commands are handled at the end of this script.
        exit $2
 }
 
 # We need to run getops as soon as possible so we catch -d and other
 # options that will modify our behaviour.
 # Commands are handled at the end of this script.
-while getopts "c:dvr" flag; do
+while getopts "c:dv" flag; do
        if [ x"$1" = x'-d' ] || [ x"$1" = x'--debug' ]; then
                set -vx
                VCSH_DEBUG=1
        if [ x"$1" = x'-d' ] || [ x"$1" = x'--debug' ]; then
                set -vx
                VCSH_DEBUG=1
@@ -40,8 +41,6 @@ while getopts "c:dvr" flag; do
                VCSH_VERBOSE=1
                echo "verbose mode on"
                echo "$SELF $VERSION"
                VCSH_VERBOSE=1
                echo "verbose mode on"
                echo "$SELF $VERSION"
-       elif [ x"$1" = x'-r' ]; then
-               VCSH_OPTION_RECURSIVE=1
        elif [ x"$1" = x'-c' ]; then
                VCSH_OPTION_CONFIG=$OPTARG
        fi
        elif [ x"$1" = x'-c' ]; then
                VCSH_OPTION_CONFIG=$OPTARG
        fi
@@ -77,6 +76,7 @@ fi
 # Read defaults
 : ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
 : ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
 # Read defaults
 : ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
 : ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
+: ${VCSH_OVERLAY_D:="$XDG_CONFIG_HOME/vcsh/overlays-enabled"}
 : ${VCSH_BASE:="$HOME"}
 : ${VCSH_GITIGNORE:=exact}
 : ${VCSH_GITATTRIBUTES:=none}
 : ${VCSH_BASE:="$HOME"}
 : ${VCSH_GITIGNORE:=exact}
 : ${VCSH_GITATTRIBUTES:=none}
@@ -100,7 +100,8 @@ help() {
    -v                   Enable verbose mode
 
    commands:
    -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
          [<repo>]       Clone from an existing repository
    commit               Commit in all repositories
    delete <repo>        Delete an existing repository
@@ -108,9 +109,10 @@ help() {
    help                 Display this help text
    init <repo>          Initialize a new repository
    list                 List all repositories
    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
    push                 Push to vcsh remotes
    rename <repo> \\
    pull                 Pull from all vcsh remotes
    push                 Push to vcsh remotes
    rename <repo> \\
@@ -148,15 +150,17 @@ clone() {
        hook pre-clone
        init
        git remote add origin "$GIT_REMOTE"
        hook pre-clone
        init
        git remote add origin "$GIT_REMOTE"
-       git config branch.master.remote origin
-       git config branch.master.merge  refs/heads/master
-       if [ $(git ls-remote origin master 2> /dev/null | wc -l ) -lt 1 ]; then
-               info "remote is empty, not merging anything"
+       git checkout -b "$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
                exit
        fi
-       git fetch
+       git fetch origin "$VCSH_BRANCH"
        hook pre-merge
        hook pre-merge
-       git ls-tree -r --name-only origin/master | (while read object; do
+       git ls-tree -r --name-only origin/"$VCSH_BRANCH" | (while read object; do
                [ -e "$object" ] &&
                        error "'$object' exists." &&
                        VCSH_CONFLICT=1
                [ -e "$object" ] &&
                        error "'$object' exists." &&
                        VCSH_CONFLICT=1
@@ -164,7 +168,7 @@ clone() {
        [ x"$VCSH_CONFLICT" = x'1' ]) &&
                fatal "will stop after fetching and not try to merge!
   Once this situation has been resolved, run 'vcsh $VCSH_REPO_NAME pull' to finish cloning." 17
        [ x"$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
        hook post-merge
        hook post-clone
        retire
@@ -210,6 +214,16 @@ enter() {
        hook post-enter
 }
 
        hook post-enter
 }
 
+foreach() {
+       hook pre-foreach
+       for VCSH_REPO_NAME in $(list); do
+               GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
+               use
+               "$@"
+       done
+       hook post-foreach
+}
+
 git_dir_exists() {
        [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
 }
 git_dir_exists() {
        [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
 }
@@ -244,16 +258,71 @@ get_files() {
 }
 
 list_tracked() {
 }
 
 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() {
 }
 
 list_tracked_by() {
-       use
-       git ls-files | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
-           sed 's/[,\&]/\\&/g')," | sort -u
+       list_tracked $2
+}
+
+list_untracked() {
+       command -v 'comm' >/dev/null 2>&1 || fatal "Could not find 'comm'"
+
+       temp_file_others=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
+       temp_file_untracked=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
+       temp_file_untracked_copy=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
+
+       # Hack in support for `vcsh list-untracked -r`...
+       directory_opt="--directory"
+       shift 1
+       while getopts "r" flag; do
+               if [ x"$1" = x'-r' ]; then
+                       unset directory_opt
+               fi
+               shift 1
+       done
+       # ...and parse for a potential parameter afterwards. As we shifted things out of $* in during getops, we need to look at $1
+       VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
+
+       if [ -n "$VCSH_REPO_NAME" ]; then
+               list_untracked_helper $VCSH_REPO_NAME
+       else
+               for VCSH_REPO_NAME in $(list); do
+                       list_untracked_helper $VCSH_REPO_NAME
+               done
+       fi
+       cat $temp_file_untracked
+
+       unset directory_opt directory_component
+       rm -f $temp_file_others $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not delete temp files'
+}
+
+list_untracked_helper() {
+       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       git ls-files --others "$directory_opt" | (
+               while read line; do
+                       echo "$line"
+                       directory_component=${line%%/*}
+                       [ -d "$directory_component" ] && printf '%s/\n' "$directory_component"
+               done
+               ) | sort -u > $temp_file_others
+       if [ -z "$ran_once" ]; then
+               ran_once=1
+               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
 }
 
 pull() {
 }
 
 pull() {
@@ -286,50 +355,6 @@ retire() {
        unset VCSH_DIRECTORY
 }
 
        unset VCSH_DIRECTORY
 }
 
-command_exists() {
-       command -v "$1" >/dev/null 2>&1 || fatal "Could not find '$1' command"
-}
-
-list_untracked() {
-       command_exists comm
-
-       temp_file_others=$(mktemp) || fatal 'Could not create temp file'
-       temp_file_untracked=$(mktemp) || fatal 'Could not create temp file'
-       temp_file_untracked_copy=$(mktemp) || fatal 'Could not create temp file'
-       
-       # create dummy git repo
-       temp_repo=$(mktemp -d) || fatal 'Could not create temp repo'
-
-       cd $temp_repo || fatal 'Could not cd into temp repo'
-       git init -q
-       mktemp -q -p $(pwd) > /dev/null || fatal 'Could not create dummy file'
-       git add .
-       git commit -q -m "dummy"
-       cd - > /dev/null 2>&1 || fatal 'Could not cd back'
-
-       [ -z "$VCSH_OPTION_RECURSIVE" ] && directory_opt="--directory"
-
-       export GIT_DIR=$temp_repo/.git
-       git ls-files --others "$directory_opt" | sort -u > $temp_file_untracked
-
-       for VCSH_REPO_NAME in $(list); do
-               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
-               git ls-files --others "$directory_opt" | (
-                       while read line; do
-                               echo "$line"
-                               printf '%s/\n' "$(echo "$line" | cut -d'/' -f1)"
-                       done
-                       ) | sort -u > $temp_file_others
-               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
-       done
-       cat $temp_file_untracked
-       
-       unset directory_opt
-       rm -f $temp_file_others $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not delete temp files'
-       rm -rf $temp_repo || fatal 'Could not delete temp repo'
-}
-
 rename() {
        git_dir_exists
        [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
 rename() {
        git_dir_exists
        [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
@@ -353,22 +378,29 @@ run() {
 
 status() {
        if [ -n "$VCSH_REPO_NAME" ]; then
 
 status() {
        if [ -n "$VCSH_REPO_NAME" ]; then
-               GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
-               use
-               git status --short --untracked-files='no'
-               VCSH_COMMAND_RETURN_CODE=$?
+               status_helper $VCSH_REPO_NAME
        else
                for VCSH_REPO_NAME in $(list); do
                        echo "$VCSH_REPO_NAME:"
        else
                for VCSH_REPO_NAME in $(list); do
                        echo "$VCSH_REPO_NAME:"
-                       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
-                       use
-                       git status --short --untracked-files='no'
-                       VCSH_COMMAND_RETURN_CODE=$?
+                       status_helper $VCSH_REPO_NAME
                        echo
                done
        fi
 }
 
                        echo
                done
        fi
 }
 
+status_helper() {
+       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
+       use
+       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 $commits_ahead commits"
+       }
+       git status --short --untracked-files='no'
+       VCSH_COMMAND_RETURN_CODE=$?
+}
+
 upgrade() {
        hook pre-upgrade
        # fake-bare repositories are not bare, actually. Set this to false
 upgrade() {
        hook pre-upgrade
        # fake-bare repositories are not bare, actually. Set this to false
@@ -397,6 +429,7 @@ use() {
 }
 
 which() {
 }
 
 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"
        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"
@@ -476,11 +509,28 @@ case $VCSH_COMMAND in
 esac    
 
 if [ x"$VCSH_COMMAND" = x'clone' ]; then
 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"
        [ -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 "$VCSH_COMMAND: could not determine repository name" 1
        export VCSH_REPO_NAME
        [ -z "$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 $VERSION"
        GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
 elif [ "$VCSH_COMMAND" = 'version' ]; then
        echo "$SELF $VERSION"
@@ -506,6 +556,9 @@ elif [ x"$VCSH_COMMAND" = x'delete' ]           ||
        [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
                                              GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
        [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
        [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
                                              GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
        [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
+elif [ x"$VCSH_COMMAND" = x'foreach' ]; then
+       [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a command" 1
+       shift 1
 elif [ x"$VCSH_COMMAND" = x'commit' ] ||
      [ x"$VCSH_COMMAND" = x'list'   ] ||
      [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
 elif [ x"$VCSH_COMMAND" = x'commit' ] ||
      [ x"$VCSH_COMMAND" = x'list'   ] ||
      [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
@@ -557,6 +610,17 @@ check_dir "$VCSH_REPO_D"
 
 verbose "$VCSH_COMMAND begin"
 VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
 
 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 "$overlay" ] || continue
+       info "sourcing '$overlay'"
+       . "$overlay"
+done
+
 hook pre-command
 $VCSH_COMMAND "$@"
 hook post-command
 hook pre-command
 $VCSH_COMMAND "$@"
 hook post-command
version controlled RC files

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