mirror of
https://github.com/kuhyx/testsAndMisc.git
synced 2026-07-04 15:03:01 +02:00
360 lines
17 KiB
Bash
360 lines
17 KiB
Bash
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#!/bin/bash
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# ============================================================================
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# setup_dwm.sh — download, configure (i3-like), build & install suckless dwm
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# ============================================================================
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# Installs dwm ALONGSIDE the existing i3 setup. i3 is never touched; dwm shows
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# up as a separate session you can boot into (see switch-wm).
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#
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# SOURCE OF TRUTH: every customisation lives as a real, version-controlled file
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# under linux_configuration/dwm/ and is COPIED onto a fresh upstream clone:
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# dwm/config.h -> the i3-like config (keys, colours, rules)
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# dwm/pointer-confine.c -> XFixes cursor-lock helper for fullscreen gaming
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# dwm/bin/* -> dwm-session, dwmstatus, dwm-rebuild, switch-wm,
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# pconfine-auto
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# dwm/patches/*.patch -> human-readable form of the two dwm.c changes that
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# this script applies with perl (focus-on-click +
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# fullscreen pointer-confine)
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#
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# Bleeding edge: upstream master is cloned and `git reset --hard`'d on every run;
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# our files are copied/applied on top, so `git pull && rebuild` keeps working.
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# Edit the files in dwm/ and re-run this script to apply a permanent change.
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# ============================================================================
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set -euo pipefail
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readonly SRC_DIR="${HOME}/.local/src/dwm"
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readonly DWM_REPO="https://git.suckless.org/dwm"
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readonly XSESSION="/usr/share/xsessions/dwm.desktop"
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readonly BIN_SESSION="/usr/local/bin/dwm-session"
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readonly BIN_STATUS="/usr/local/bin/dwmstatus"
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readonly BIN_REBUILD="/usr/local/bin/dwm-rebuild"
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readonly BIN_SWITCH="/usr/local/bin/switch-wm"
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readonly BIN_CONFINE="/usr/local/bin/pointer-confine"
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readonly BIN_CONFINE_AUTO="/usr/local/bin/pconfine-auto"
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# Repo dir holding our versioned dwm source (resolved from this script's path,
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# so it works regardless of the caller's CWD): features/ -> ... -> dwm/.
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SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
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readonly SCRIPT_DIR
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REPO_DWM_DIR="$(cd -- "${SCRIPT_DIR}/../../.." && pwd)/dwm"
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readonly REPO_DWM_DIR
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log() { printf '\033[1;34m==>\033[0m %s\n' "$*"; }
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warn() { printf '\033[1;33m!! \033[0m %s\n' "$*" >&2; }
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# ---------------------------------------------------------------------------
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# 0. Confirm the versioned dwm source files are present in the repo before we
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# touch anything. Fail fast and clearly if the checkout is incomplete.
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# ---------------------------------------------------------------------------
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validate_repo_files() {
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local f missing=()
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local need=(
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"config.h"
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"pointer-confine.c"
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"bin/dwm-session"
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"bin/dwmstatus"
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"bin/dwm-rebuild"
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"bin/switch-wm"
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"bin/pconfine-auto"
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)
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for f in "${need[@]}"; do
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[[ -f "${REPO_DWM_DIR}/${f}" ]] || missing+=("${REPO_DWM_DIR}/${f}")
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done
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if ((${#missing[@]})); then
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warn "Missing required dwm source files (is the repo checkout complete?):"
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printf ' %s\n' "${missing[@]}" >&2
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exit 1
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fi
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log "dwm source files present in repo: $REPO_DWM_DIR"
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}
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# ---------------------------------------------------------------------------
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# 1. Dependencies — DETECT ONLY, never auto-install.
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# This system's `pacman` is a digital-wellbeing wrapper that deadlocks when
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# driven non-interactively (stdin /dev/null + the /etc/hosts guard hooks
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# re-enter pacman and futex-deadlock on db.lck). So we never run `pacman -S`
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# from here. We only do a single read-only `pacman -Qq` (no db lock, no
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# transaction hooks) to check what's present, and tell the user to install
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# anything missing themselves, interactively, the way the wrapper expects.
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# ---------------------------------------------------------------------------
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install_deps() {
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log "Checking dependencies (read-only; the pacman wrapper is NOT invoked for installs)…"
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local required=(libx11 libxft libxinerama gcc make dmenu terminator)
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local optional=(xorg-xsetroot) # status bar only — dwm runs fine without it
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local installed missing_req=() missing_opt=() p
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installed="$(pacman -Qq 2>/dev/null)" || installed=""
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for p in "${required[@]}"; do
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grep -qxF "$p" <<<"$installed" || missing_req+=("$p")
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done
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for p in "${optional[@]}"; do
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grep -qxF "$p" <<<"$installed" || missing_opt+=("$p")
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done
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if ((${#missing_req[@]})); then
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warn "Missing REQUIRED packages: ${missing_req[*]}"
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warn "Install them yourself (interactively), then re-run this script:"
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warn " sudo pacman -S ${missing_req[*]}"
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exit 1
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fi
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if ((${#missing_opt[@]})); then
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warn "Optional status-bar package missing: ${missing_opt[*]} — dwm will still run."
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warn "For the status bar, install it later in your terminal:"
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warn " sudo pacman -S ${missing_opt[*]}"
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fi
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log "All required dependencies present."
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}
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# ---------------------------------------------------------------------------
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# 2. Fetch the LATEST dwm source (bleeding edge — always upstream master HEAD)
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# into a persistent, user-owned location so it can be re-edited and
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# recompiled at will. On re-run we hard-reset to origin/master to pull in
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# upstream changes; our config.h is untracked, so the reset never touches it.
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# ---------------------------------------------------------------------------
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fetch_dwm() {
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if [[ -d "$SRC_DIR/.git" ]]; then
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log "Updating dwm to the latest upstream master (bleeding edge)…"
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git -C "$SRC_DIR" fetch --quiet origin
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# config.h is untracked, so a hard reset of tracked files preserves it.
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git -C "$SRC_DIR" reset --hard --quiet origin/master
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else
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log "Cloning the latest dwm master into $SRC_DIR…"
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mkdir -p "$(dirname "$SRC_DIR")"
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git clone --quiet "$DWM_REPO" "$SRC_DIR"
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fi
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log "dwm source now at commit $(git -C "$SRC_DIR" rev-parse --short HEAD) ($(git -C "$SRC_DIR" log -1 --format=%cd --date=short))"
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}
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# ---------------------------------------------------------------------------
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# 3. Install our versioned config.h onto the fresh upstream clone. dwm.c stays
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# pristine here — movestack()/togglefullscr() are defined inside config.h, so
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# only the two intentional behaviour changes below patch dwm.c.
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# ---------------------------------------------------------------------------
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install_config() {
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log "Installing config.h from the repo (${REPO_DWM_DIR}/config.h)…"
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cp -- "${REPO_DWM_DIR}/config.h" "$SRC_DIR/config.h"
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}
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# ---------------------------------------------------------------------------
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# 3b. Auto-merge bleeding-edge config churn. When upstream adds a new config
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# knob (e.g. `refreshrate`), dwm.c starts referencing a symbol our
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# hand-written config.h doesn't define, breaking the build. To keep
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# "always latest master" sustainable, copy across any scalar knob that the
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# current dwm.c needs but our config.h lacks, using upstream's default.
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# Only single-line scalars referenced by dwm.c are merged (arrays we own
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# and unused symbols are left alone), so our customisations always win.
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# ---------------------------------------------------------------------------
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heal_config() {
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local defh="$SRC_DIR/config.def.h" cfgh="$SRC_DIR/config.h" dwmc="$SRC_DIR/dwm.c"
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[[ -f "$defh" && -f "$dwmc" ]] || return 0
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local line name added=0
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while IFS= read -r line; do
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name="$(sed -nE 's/^.*[^A-Za-z0-9_]([A-Za-z_][A-Za-z0-9_]*)[[:space:]]*=.*/\1/p' <<<"$line")"
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[[ -n "$name" ]] || continue
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grep -qw "$name" "$cfgh" && continue # we already define it — keep ours
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grep -qw "$name" "$dwmc" || continue # dwm.c doesn't need it — skip
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printf '%s\n' "$line" >>"$cfgh"
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warn "config.h: auto-merged new upstream knob '$name' (bleeding-edge churn)"
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added=1
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done < <(grep -E '^[[:space:]]*static[[:space:]]+const[[:space:]]+[^={]*=[^;{]*;' "$defh")
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((added)) && log "Merged upstream config symbol(s) into config.h for this build."
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return 0
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}
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# ---------------------------------------------------------------------------
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# 3c. Focus-on-click: stop the pointer from changing focus / switching monitors.
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# dwm defaults to focus-follows-mouse — and worse, crossing the screen
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# boundary over EMPTY space (motionnotify) switches the active monitor, which
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# yanks focus away from a fullscreen game on the other screen (no window edge
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# to stop the pointer). We rewrite enternotify + motionnotify to no-ops so
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# focus only changes on a CLICK or via the Mod+,/. (Mod+Ctrl+arrows) keys.
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# Applied as an idempotent source rewrite after each reset so it survives the
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# bleeding-edge `git pull`. perl -0777 slurps the file so the multi-line
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# function bodies match at once (.*? stops at the first column-0 `}`, i.e. the
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# function's own closing brace — nested if-block braces are tab-indented).
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# The dwm/patches/focus-on-click.patch file is the human-readable equivalent.
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# If upstream refactors these handlers the rewrite no-ops and we warn loudly
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# rather than silently dropping the behaviour.
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# ---------------------------------------------------------------------------
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apply_focusonclick() {
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local src="$SRC_DIR/dwm.c"
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[[ -f "$src" ]] || return 0
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perl -0777 -i -pe '
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s!\nenternotify\(XEvent \*e\)\n\{.*?\n\}\n!\nenternotify(XEvent *e)\n{\n\t/* focusonclick: pointer never changes focus; use a click or Mod+keys. */\n\t(void)e;\n}\n!s;
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s!\nmotionnotify\(XEvent \*e\)\n\{.*?\n\}\n!\nmotionnotify(XEvent *e)\n{\n\t/* focusonclick: keep the active monitor fixed when crossing screens. */\n\t(void)e;\n}\n!s;
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' "$src"
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# Verify both rewrites landed; warn (never abort) if upstream changed shape.
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local ok=1
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grep -q 'focusonclick: pointer never changes focus' "$src" || ok=0
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grep -q 'focusonclick: keep the active monitor fixed' "$src" || ok=0
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if ((ok)); then
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log "Applied focus-on-click (pointer no longer changes focus or switches monitors)."
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else
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warn "focus-on-click rewrite did NOT match upstream dwm.c — pointer focus unchanged."
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warn "enternotify/motionnotify were likely refactored upstream; update dwm/patches."
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fi
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return 0
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}
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# ---------------------------------------------------------------------------
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# 3d. Auto pointer-confinement on fullscreen. dwm has no pointer barriers, so on
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# a dual-monitor setup the cursor slides off a fullscreen game onto the other
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# screen (there is no window edge to stop it). We hook setfullscreen() to
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# start the `pointer-confine` helper (XFixes barriers) when a window goes
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# fullscreen and stop it when fullscreen ends; unmanage() also stops it so a
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# game that closes WHILE fullscreen can never leave the cursor trapped. The
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# hook is a quick `if (system(...)) {}` — the `if` consumes system()'s result
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# so -Wall stays warning-free; the trailing `&` returns to dwm immediately.
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# Reapplied after each reset (idempotent via git) and self-verifying; the
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# dwm/patches/fullscreen-pointer-confine.patch file mirrors it for reading.
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# ---------------------------------------------------------------------------
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apply_fullscreen_confine_hook() {
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local src="$SRC_DIR/dwm.c"
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[[ -f "$src" ]] || return 0
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perl -0777 -i -pe '
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s!(\n\t\tc->isfullscreen = 1;\n)!$1\t\tif (system("pconfine-auto on &")) {}\n!;
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s!(\n\t\tc->isfullscreen = 0;\n)!$1\t\tif (system("pconfine-auto off &")) {}\n!;
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s!(\nunmanage\(Client \*c, int destroyed\)\n\{\n\tMonitor \*m = c->mon;\n\tXWindowChanges wc;\n)!$1\tif (c->isfullscreen) { if (system("pconfine-auto off &")) {} }\n!;
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' "$src"
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# Expect: 1 "on", 2 "off" (setfullscreen-leave + unmanage). Warn if not.
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local on off
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on=$(grep -c 'pconfine-auto on' "$src")
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off=$(grep -c 'pconfine-auto off' "$src")
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if [[ "$on" == 1 && "$off" == 2 ]]; then
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log "Applied auto pointer-confinement hook (locks the cursor to a fullscreen window's screen)."
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else
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warn "pointer-confine hook only partially applied (on=$on off=$off, expected 1/2)."
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warn "setfullscreen/unmanage were likely refactored upstream; update dwm/patches."
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fi
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return 0
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}
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# ---------------------------------------------------------------------------
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# 4. Build & install (PREFIX defaults to /usr/local).
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# ---------------------------------------------------------------------------
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build_install() {
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log "Compiling dwm…"
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make -C "$SRC_DIR" clean >/dev/null
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make -C "$SRC_DIR" 2>&1 | tail -15
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log "Installing dwm (sudo make install)…"
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sudo make -C "$SRC_DIR" install 2>&1 | tail -8
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}
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# ---------------------------------------------------------------------------
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# 4b. Build & install the pointer-confine helper (XFixes barriers) from the
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# versioned dwm/pointer-confine.c. Standalone C so it stays out of dwm.c;
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# dwm only spawns it via the setfullscreen() hook. If the X dev headers are
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# missing it fails soft: warn and skip, leaving the rest of dwm fully working
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# (fullscreen just won't auto-lock the cursor).
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# ---------------------------------------------------------------------------
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build_pointer_confine() {
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log "Compiling pointer-confine from the repo (${REPO_DWM_DIR}/pointer-confine.c)…"
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local bin
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bin="$(mktemp)"
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if cc -std=c99 -pedantic -Wall -O2 "${REPO_DWM_DIR}/pointer-confine.c" -o "$bin" \
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-lX11 -lXfixes -lXinerama 2>/tmp/pointer-confine-build.log; then
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sudo install -m 755 "$bin" "$BIN_CONFINE"
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log "Installed $BIN_CONFINE."
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else
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warn "pointer-confine failed to compile — fullscreen cursor-lock disabled (dwm itself is fine):"
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sed 's/^/ /' /tmp/pointer-confine-build.log >&2 || true
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fi
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rm -f "$bin"
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}
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# ---------------------------------------------------------------------------
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# 5. Install the helper scripts (from the repo) and register the lightdm
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# xsession. The scripts are the versioned files in dwm/bin/; we just place
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# them on PATH with the right mode.
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# ---------------------------------------------------------------------------
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write_session_files() {
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log "Installing helper scripts from the repo and the lightdm xsession entry…"
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sudo install -m 755 "${REPO_DWM_DIR}/bin/dwm-session" "$BIN_SESSION"
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sudo install -m 755 "${REPO_DWM_DIR}/bin/dwmstatus" "$BIN_STATUS"
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sudo install -m 755 "${REPO_DWM_DIR}/bin/dwm-rebuild" "$BIN_REBUILD"
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sudo install -m 755 "${REPO_DWM_DIR}/bin/switch-wm" "$BIN_SWITCH"
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sudo install -m 755 "${REPO_DWM_DIR}/bin/pconfine-auto" "$BIN_CONFINE_AUTO"
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# --- xsession entry for lightdm (absolute Exec path) --------------------
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sudo tee "$XSESSION" >/dev/null <<'DESKTOP_EOF'
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[Desktop Entry]
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Name=dwm (i3-like)
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Comment=dynamic window manager, compiled from source
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Exec=/usr/local/bin/dwm-session
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TryExec=/usr/local/bin/dwm
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Type=Application
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DesktopNames=dwm
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DESKTOP_EOF
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}
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# ---------------------------------------------------------------------------
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# 6. Verify the build links and the session is registered.
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# ---------------------------------------------------------------------------
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verify() {
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log "Verifying install…"
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local ver
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ver="$(dwm -v 2>&1)" || true # dwm -v prints version then exit(1)
|
||
|
|
log "dwm version: ${ver:-<none>}"
|
||
|
|
command -v dwm >/dev/null && log "dwm binary: $(command -v dwm)"
|
||
|
|
[[ -f "$XSESSION" ]] && log "xsession registered: $XSESSION"
|
||
|
|
}
|
||
|
|
|
||
|
|
print_summary() {
|
||
|
|
cat <<SUMMARY
|
||
|
|
|
||
|
|
dwm is installed alongside i3 (i3 untouched).
|
||
|
|
This machine autologins (no session picker), so choose the WM you boot into:
|
||
|
|
switch-wm dwm -> boot dwm switch-wm i3 -> boot i3 switch-wm -> show
|
||
|
|
then reboot. Recovery if dwm misbehaves: TTY (Ctrl+Alt+F3) -> 'switch-wm i3' -> reboot.
|
||
|
|
|
||
|
|
Key bindings (Mod = Super):
|
||
|
|
Mod+Return terminator Mod+d dmenu
|
||
|
|
Mod+j / Mod+k focus next / prev Mod+Shift+j/k move in stack
|
||
|
|
Mod+h / Mod+l shrink / grow master Mod+i/Shift+i +/- master count
|
||
|
|
Mod+1..0 view tag 1..10 Mod+Shift+1..0 send to tag
|
||
|
|
Mod+f fullscreen Mod+Shift+space toggle floating
|
||
|
|
Mod+t / Mod+w tiling / monocle Mod+Shift+Return promote to master
|
||
|
|
Mod+Shift+q kill window Mod+Shift+e exit dwm
|
||
|
|
Mod+m mic mute Mod+Shift+r recompile (dwm-rebuild)
|
||
|
|
|
||
|
|
Two monitors (no i3-style per-output workspaces — see config.h note):
|
||
|
|
Mod+, / Mod+. focus the other screen (or Mod+Ctrl+Left/Right)
|
||
|
|
Mod+Shift+, / Mod+Shift+. throw window there (or Mod+Ctrl+Shift+L/R)
|
||
|
|
Focus-on-click is ON: the pointer no longer steals focus or switches monitors
|
||
|
|
when it crosses screens. Focus changes on click/keys.
|
||
|
|
Fullscreen cursor-lock is ON: when a window goes fullscreen (games), the cursor
|
||
|
|
is trapped on that screen (XFixes barriers) and released when fullscreen ends.
|
||
|
|
Stuck barrier? Mod+Shift+p force-releases it.
|
||
|
|
|
||
|
|
Status bar (clock, temps, load, RAM, volume) needs xsetroot:
|
||
|
|
sudo pacman -S xorg-xsetroot # then log out / back in
|
||
|
|
Preview it now without the bar: dwmstatus once
|
||
|
|
|
||
|
|
Customise (permanent): edit files in linux_configuration/dwm/ then re-run this
|
||
|
|
script. Quick experiment: edit ~/.local/src/dwm/config.h + run 'dwm-rebuild'
|
||
|
|
(re-running setup_dwm.sh overwrites it from the repo).
|
||
|
|
SUMMARY
|
||
|
|
}
|
||
|
|
|
||
|
|
main() {
|
||
|
|
validate_repo_files
|
||
|
|
install_deps
|
||
|
|
fetch_dwm
|
||
|
|
install_config
|
||
|
|
heal_config
|
||
|
|
apply_focusonclick
|
||
|
|
apply_fullscreen_confine_hook
|
||
|
|
build_install
|
||
|
|
build_pointer_confine
|
||
|
|
write_session_files
|
||
|
|
verify
|
||
|
|
print_summary
|
||
|
|
}
|
||
|
|
|
||
|
|
main "$@"
|