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POSIX syntax requires ; before }
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index ba0049e542120cf4931ce3652b9b412808bef2b4..1c4fed3c1bf706b6481eaf3a5cd68835e580e80b 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -1,40 +1,113 @@
 #!/bin/sh
 
 # This program is licensed under the GNU GPL version 2 or later.
 #!/bin/sh
 
 # This program is licensed under the GNU GPL version 2 or later.
-# (c) Richard "RichiH" Hartmann <richih.mailinglist@gmail.com>, 2011-2012
+# (c) Richard "RichiH" Hartmann <richih.mailinglist@gmail.com>, 2011-2013
 # For details, see LICENSE. To submit patches, you have to agree to
 # license your code under the GNU GPL version 2 or later.
 
 # For details, see LICENSE. To submit patches, you have to agree to
 # license your code under the GNU GPL version 2 or later.
 
+# While the following is not legally binding, the author would like to
+# explain the choice of GPLv2+ over GPLv3+.
+# The author prefers GPLv3+ over GPLv2+ but feels it's better to maintain
+# full compatibility's with git. In case git ever changes its licensing terms,
+# which is admittedly extremely unlikely to the point of being impossible,
+# this software will most likely follow suit.
+
+# This should always be the first line of code to facilitate debugging
+[ -n "$VCSH_DEBUG" ] && set -vx
+
+basename() {
+       # Implemented in shell to avoid spawning another process
+       local file
+       file="${1##*/}"
+       [ -z "$2" ] || file="${file%$2}"
+       echo "$file"
+}
+
+SELF=$(basename $0)
+VERSION='1.20130614'
+
+fatal() {
+       echo "$SELF: fatal: $1" >&2
+       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:dv" flag; do
+       if [ "$1" = '-d' ] || [ "$1" = '--debug' ]; then
+               set -vx
+               VCSH_DEBUG=1
+               echo "$SELF $VERSION"
+       elif [ "$1" = '-v' ];then
+               VCSH_VERBOSE=1
+               echo "$SELF $VERSION"
+       elif [ "$1" = '-c' ];then
+               VCSH_OPTION_CONFIG=$OPTARG
+       fi
+       shift 1
+done
+
+source_all() {
+       # Source file even if it's in $PWD and does not have any slashes in it
+       case "$1" in
+               */*) . "$1";;
+               *)   . "$PWD/$1";;
+       esac;
+}
 
 
+
+# Read configuration and set defaults if anything's not set
 [ -n "$VCSH_DEBUG" ]                  && set -vx
 [ -z "$XDG_CONFIG_HOME" ]             && XDG_CONFIG_HOME="$HOME/.config"
 [ -n "$VCSH_DEBUG" ]                  && set -vx
 [ -z "$XDG_CONFIG_HOME" ]             && XDG_CONFIG_HOME="$HOME/.config"
+
+# Read configuration files if there are any
+[ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
 [ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
 [ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
+if [ -n "$VCSH_OPTION_CONFIG" ]; then
+       # Source $VCSH_OPTION_CONFIG if it can be read and is in $PWD of $PATH
+       if [ -r "$VCSH_OPTION_CONFIG" ]; then
+               source_all "$VCSH_OPTION_CONFIG"
+       else
+               fatal "Can not read configuration file '$VCSH_OPTION_CONFIG'" 1
+       fi
+fi
 [ -n "$VCSH_DEBUG" ]                  && set -vx
 [ -n "$VCSH_DEBUG" ]                  && set -vx
+
+# Read defaults
 [ -z "$VCSH_REPO_D" ]                 && VCSH_REPO_D="$XDG_CONFIG_HOME/vcsh/repo.d"
 [ -z "$VCSH_HOOK_D" ]                 && VCSH_HOOK_D="$XDG_CONFIG_HOME/vcsh/hooks-enabled"
 [ -z "$VCSH_BASE" ]                   && VCSH_BASE="$HOME"
 [ -z "$VCSH_GITIGNORE" ]              && VCSH_GITIGNORE='exact'
 
 [ -z "$VCSH_REPO_D" ]                 && VCSH_REPO_D="$XDG_CONFIG_HOME/vcsh/repo.d"
 [ -z "$VCSH_HOOK_D" ]                 && VCSH_HOOK_D="$XDG_CONFIG_HOME/vcsh/hooks-enabled"
 [ -z "$VCSH_BASE" ]                   && VCSH_BASE="$HOME"
 [ -z "$VCSH_GITIGNORE" ]              && VCSH_GITIGNORE='exact'
 
-SELF=$(basename $0)
 
 help() {
 
 help() {
-       echo "usage: $SELF <args>
+       echo "usage: $SELF <options> <command>
 
 
+   options:
+   -c <file>            Source file
+   -d                   Enable debug mode
+   -v                   Enable verbose mode
+
+   commands:
    clone <remote> \\
          [<repo>]       Clone from an existing repository
    clone <remote> \\
          [<repo>]       Clone from an existing repository
+   delete <repo>        Delete an existing repository
+   enter <repo>         Enter repository; spawn new instance of \$SHELL
    help                 Display this help text
    help                 Display this help text
-   delete               Delete an existing repository
-   enter                Enter repository; spawn new instance of \$SHELL
    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
    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
+   pull                 Pull from all vcsh remotes
+   push                 Push to vcsh remotes
    rename <repo> \\
           <newname>     Rename repository
    run <repo> \\
        <command>        Use this repository
    rename <repo> \\
           <newname>     Rename repository
    run <repo> \\
        <command>        Use this repository
-   setup                Set up repository with recommended settings
+   upgrade <repo>       Upgrade repository to currently recommended settings
+   version              Print version information
    which <substring>    Find substring in name of any tracked file
    write-gitignore \\
    <repo>               Write .gitignore.d/<repo> via git ls-files
    which <substring>    Find substring in name of any tracked file
    write-gitignore \\
    <repo>               Write .gitignore.d/<repo> via git ls-files
@@ -51,11 +124,6 @@ verbose() {
        if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
 }
 
        if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
 }
 
-fatal() {
-       echo "$SELF: fatal: $1" >&2
-       exit $2
-}
-
 error() {
        echo "$SELF: error: $1" >&2
 }
 error() {
        echo "$SELF: error: $1" >&2
 }
@@ -65,6 +133,7 @@ info() {
 }
 
 clone() {
 }
 
 clone() {
+       hook pre-clone
        init
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        init
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
@@ -83,12 +152,15 @@ clone() {
                fatal "will stop after fetching and not try to merge!
   Once this situation has been resolved, run 'vcsh run $VCSH_REPO_NAME git pull' to finish cloning.\n" 17
        git merge origin/master
                fatal "will stop after fetching and not try to merge!
   Once this situation has been resolved, run 'vcsh run $VCSH_REPO_NAME git pull' to finish cloning.\n" 17
        git merge origin/master
+       hook post-clone
+       retire
+       hook post-clone-retired
 }
 
 delete() {
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
        use
 }
 
 delete() {
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
        use
-       info "This operation WILL DETROY DATA!"
+       info "This operation WILL DESTROY DATA!"
        files=$(git ls-files)
        echo "These files will be deleted:
 
        files=$(git ls-files)
        echo "These files will be deleted:
 
@@ -101,7 +173,7 @@ To continue, type 'Yes, do as I say'"
        for file in $files; do
                rm -f $file || info "could not delete '$file', continuing with deletion"
        done
        for file in $files; do
                rm -f $file || info "could not delete '$file', continuing with deletion"
        done
-       rm -r "$GIT_DIR" || error "could not delete '$GIT_DIR'"
+       rm -rf "$GIT_DIR" || error "could not delete '$GIT_DIR'"
 }
 
 enter() {
 }
 
 enter() {
@@ -118,7 +190,7 @@ git_dir_exists() {
 hook() {
        for hook in $VCSH_HOOK_D/$1* $VCSH_HOOK_D/$VCSH_REPO_NAME.$1*; do
                [ -x "$hook" ] || continue
 hook() {
        for hook in $VCSH_HOOK_D/$1* $VCSH_HOOK_D/$VCSH_REPO_NAME.$1*; do
                [ -x "$hook" ] || continue
-               info "executing '$hook'"
+               verbose "executing '$hook'"
                "$hook"
        done
 }
                "$hook"
        done
 }
@@ -129,12 +201,12 @@ init() {
        mkdir -p "$GIT_WORK_TREE" || fatal "could not create '$GIT_WORK_TREE'" 50
        cd "$GIT_WORK_TREE" || fatal "could not enter '$GIT_WORK_TREE'" 11
        git init
        mkdir -p "$GIT_WORK_TREE" || fatal "could not create '$GIT_WORK_TREE'" 50
        cd "$GIT_WORK_TREE" || fatal "could not enter '$GIT_WORK_TREE'" 11
        git init
-       setup
+       upgrade
 }
 
 list() {
 }
 
 list() {
-       for i in "$VCSH_REPO_D"/*.git; do
-               echo $(basename "$i" .git)
+       for repo in "$VCSH_REPO_D"/*.git; do
+               [ -d "$repo" ] && [ -r "$repo" ] && echo $(basename "$repo" .git)
        done
 }
 
        done
 }
 
@@ -154,28 +226,61 @@ list_tracked_by() {
        git ls-files | sort -u
 }
 
        git ls-files | sort -u
 }
 
+pull() {
+       hook pre-pull
+       for VCSH_REPO_NAME in $(list); do
+               echo -n "$VCSH_REPO_NAME: "
+               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+               use
+               git pull
+       done
+       hook post-pull
+}
+
+push() {
+       hook pre-push
+       for VCSH_REPO_NAME in $(list); do
+               echo -n "$VCSH_REPO_NAME: "
+               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+               use
+               git push
+       done
+       hook post-push
+}
+
+retire() {
+       unset GIT_WORK_TREE
+       unset VCSH_DIRECTORY
+}
+
 rename() {
        git_dir_exists
        [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
        mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
 
 rename() {
        git_dir_exists
        [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
        mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
 
+       # Now that the repository has been renamed, we need to fix up its configuration
+       # Overwrite old name..
+       GIT_DIR="$GIT_DIR_NEW"
+       $VCSH_REPO_NAME="$VCSH_REPO_NAME_NEW"
+       # ..and clobber all old configuration
+       upgrade
 }
 
 run() {
        hook pre-run
        use
 }
 
 run() {
        hook pre-run
        use
-       $VCSH_EXTERNAL_COMMAND
+       "$@"
        hook post-run
 }
 
        hook post-run
 }
 
-setup() {
-       hook pre-setup
+upgrade() {
+       hook pre-upgrade
        use
        git config core.worktree     "$GIT_WORK_TREE"
        use
        git config core.worktree     "$GIT_WORK_TREE"
-       git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
+       [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
        git config vcsh.vcsh         'true'
        [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
        git config vcsh.vcsh         'true'
        [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
-       hook post-setup
+       hook post-upgrade
 }
 
 use() {
 }
 
 use() {
@@ -193,6 +298,12 @@ which() {
 }
 
 write_gitignore() {
 }
 
 write_gitignore() {
+       # Don't do anything if the user does not want to write gitignore
+       if [ "x$VCSH_GITIGNORE" = 'xnone' ]; then
+               info "Not writing gitignore as '\$VCSH_GITIGNORE' is set to 'none'"
+               exit
+       fi
+
        use
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
        gitignores=$(for file in $(git ls-files); do
        use
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
        gitignores=$(for file in $(git ls-files); do
@@ -205,9 +316,9 @@ write_gitignore() {
        tempfile=$(mktemp) || fatal "could not create tempfile" 51
        echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
        for gitignore in $gitignores; do
        tempfile=$(mktemp) || fatal "could not create tempfile" 51
        echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
        for gitignore in $gitignores; do
-               echo "$gitignore" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
-               if [ x$VCSH_GITIGNORE = x'recursive' ] && [ -d "$gitignore" ]; then
-                       { echo "$gitignore/*" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
+               echo "$gitignore" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
+               if [ "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ -d "$gitignore" ]; then
+                       { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
                fi
        done
        if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
                fi
        done
        if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
@@ -223,8 +334,8 @@ write_gitignore() {
                fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
 }
 
                fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
 }
 
-if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
-       fatal "'\$VCSH_GITIGNORE' must be either 'exact' or 'recursive'" 1
+if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ]; then
+       fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'recursive', or 'none'" 1
 fi
 
 if [ "$1" = 'clone' ]; then
 fi
 
 if [ "$1" = 'clone' ]; then
@@ -234,6 +345,9 @@ if [ "$1" = 'clone' ]; then
        [ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
        export VCSH_REPO_NAME
        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
        [ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
        export VCSH_REPO_NAME
        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+elif [ "$1" = 'version' ]; then
+       echo "$SELF $VERSION"
+       exit
 elif [ "$1" = 'which' ]; then
        [ -z "$2" ] && fatal "$1: please specify a filename" 1
        [ -n "$3" ] && fatal "$1: too many parameters" 1
 elif [ "$1" = 'which' ]; then
        [ -z "$2" ] && fatal "$1: please specify a filename" 1
        [ -n "$3" ] && fatal "$1: too many parameters" 1
@@ -245,19 +359,22 @@ elif [ "$1" = 'delete' ]           ||
      [ "$1" = 'list-tracked-by' ]  ||
      [ "$1" = 'rename' ]           ||
      [ "$1" = 'run' ]              ||
      [ "$1" = 'list-tracked-by' ]  ||
      [ "$1" = 'rename' ]           ||
      [ "$1" = 'run' ]              ||
-     [ "$1" = 'setup' ]            ||
+     [ "$1" = 'upgrade' ]          ||
      [ "$1" = 'write-gitignore' ]; then
        [ -z $2 ]                      && fatal "$1: please specify repository to work on" 1
        [ "$1" = 'rename' -a -z "$3" ] && fatal "$1: please specify a target name" 1
      [ "$1" = 'write-gitignore' ]; then
        [ -z $2 ]                      && fatal "$1: please specify repository to work on" 1
        [ "$1" = 'rename' -a -z "$3" ] && fatal "$1: please specify a target name" 1
-       [ "$1" = 'run' -a -z "$3" ]    && fatal "$1: please specify a command" 1
+       [ "$1" = 'run'    -a -z "$3" ] && fatal "$1: please specify a command" 1
        export VCSH_COMMAND="$1"
        export VCSH_REPO_NAME="$2"
        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
        export VCSH_COMMAND="$1"
        export VCSH_REPO_NAME="$2"
        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
-       [ "$VCSH_COMMAND" = 'rename' ]         && export GIT_DIR_NEW="$VCSH_REPO_D/$3.git"
-       [ "$VCSH_COMMAND" = 'run' ] && shift 2 && export VCSH_EXTERNAL_COMMAND="$*"
+       [ "$VCSH_COMMAND" = 'rename' ] && { export VCSH_REPO_NAME_NEW="$3";
+                                           export GIT_DIR_NEW="$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git"; }
+       [ "$VCSH_COMMAND" = 'run' ]    && shift 2
        [ "$VCSH_COMMAND" = 'write-gitignore' ]
 elif [ "$1" = 'list' ] ||
        [ "$VCSH_COMMAND" = 'write-gitignore' ]
 elif [ "$1" = 'list' ] ||
-     [ "$1" = 'list-tracked' ]; then
+     [ "$1" = 'list-tracked' ] ||
+     [ "$1" = 'pull' ] ||
+     [ "$1" = 'push' ]; then
        export VCSH_COMMAND="$1"
 elif [ -n "$2" ]; then
        export VCSH_COMMAND='run'
        export VCSH_COMMAND="$1"
 elif [ -n "$2" ]; then
        export VCSH_COMMAND='run'
@@ -265,7 +382,7 @@ elif [ -n "$2" ]; then
        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
        [ -d $GIT_DIR ] || { help; exit 1; }
        shift 1
        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
        [ -d $GIT_DIR ] || { help; exit 1; }
        shift 1
-       export VCSH_EXTERNAL_COMMAND="git $*"
+       set -- "git" "$@"
 elif [ -n "$1" ]; then
        export VCSH_COMMAND='enter'
        export VCSH_REPO_NAME="$1"
 elif [ -n "$1" ]; then
        export VCSH_COMMAND='enter'
        export VCSH_REPO_NAME="$1"
@@ -283,9 +400,8 @@ if echo $VCSH_REPO_NAME | grep -q '/'; then
        export VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git)
 fi
 
        export VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git)
 fi
 
-
-for check_directory in "$VCSH_REPO_D" "$VCSH_BASE/.gitignore.d"
-do
+check_dir() {
+       check_directory="$1"
        if [ ! -d "$check_directory" ]; then
                if [ -e "$check_directory" ]; then
                        fatal "'$check_directory' exists but is not a directory" 13
        if [ ! -d "$check_directory" ]; then
                if [ -e "$check_directory" ]; then
                        fatal "'$check_directory' exists but is not a directory" 13
@@ -294,11 +410,14 @@ do
                        mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
                fi
        fi
                        mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
                fi
        fi
-done
+}
+
+check_dir "$VCSH_REPO_D"
+[ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
 
 verbose "$VCSH_COMMAND begin"
 export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
 hook pre-command
 
 verbose "$VCSH_COMMAND begin"
 export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
 hook pre-command
-$VCSH_COMMAND
+$VCSH_COMMAND "$@"
 hook post-command
 verbose "$VCSH_COMMAND end, exiting"
 hook post-command
 verbose "$VCSH_COMMAND end, exiting"
version controlled RC files

Legalese

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